Merge branch 'js/no-more-prepare-for-main-in-test'

Test coverage fix.

* js/no-more-prepare-for-main-in-test:
  tests: drop the `PREPARE_FOR_MAIN_BRANCH` prereq
  t9902: use `main` as initial branch name
  t6302: use `main` as initial branch name
  t5703: use `main` as initial branch name
  t5510: use `main` as initial branch name
  t5505: finalize transitioning to using the branch name `main`
  t3205: finalize transitioning to using the branch name `main`
  t3203: complete the transition to using the branch name `main`
  t3201: finalize transitioning to using the branch name `main`
  t3200: finish transitioning to the initial branch name `main`
  t1400: use `main` as initial branch name

11 files changed, 621 insertions, 619 deletions

diff --git a/t/t1400-update-ref.sh b/t/t1400-update-ref.sh
index 31b64be521..6ee7d216fb 100755
--- a/t/t1400-update-ref.sh
+++ b/t/t1400-update-ref.sh
@@ -8,7 +8,7 @@ test_description='Test git update-ref and basic ref logging'
 
 Z=$ZERO_OID
 
-m=refs/heads/master
+m=refs/heads/main
 n_dir=refs/heads/gu
 n=$n_dir/fixes
 outside=refs/foo
@@ -27,10 +27,11 @@ create_test_commits ()
 }
 
 test_expect_success setup '
+	git checkout --orphan main &&
 	create_test_commits "" &&
 	mkdir $bare &&
 	cd $bare &&
-	git init --bare &&
+	git init --bare -b main &&
 	create_test_commits "bare" &&
 	cd -
 '
@@ -264,7 +265,7 @@ test_expect_success "(not) changed .git/$m" '
 	! test $B = $(git show-ref -s --verify $m)
 '
 
-rm -f .git/logs/refs/heads/master
+rm -f .git/logs/refs/heads/main
 test_expect_success "create $m (logged by touch)" '
 	test_config core.logAllRefUpdates false &&
 	GIT_COMMITTER_DATE="2005-05-26 23:30" \
@@ -300,7 +301,7 @@ test_expect_success 'symref empty directory removal' '
 	git branch e1/e2/r1 HEAD &&
 	git branch e1/r2 HEAD &&
 	git checkout e1/e2/r1 &&
-	test_when_finished "git checkout master" &&
+	test_when_finished "git checkout main" &&
 	test_path_is_file .git/refs/heads/e1/e2/r1 &&
 	test_path_is_file .git/logs/refs/heads/e1/e2/r1 &&
 	git update-ref -d HEAD &&
@@ -364,68 +365,68 @@ test_expect_success 'set up for querying the reflog' '
 ed="Thu, 26 May 2005 18:32:00 -0500"
 gd="Thu, 26 May 2005 18:33:00 -0500"
 ld="Thu, 26 May 2005 18:43:00 -0500"
-test_expect_success 'Query "master@{May 25 2005}" (before history)' '
+test_expect_success 'Query "main@{May 25 2005}" (before history)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{May 25 2005}" >o 2>e &&
+	git rev-parse --verify "main@{May 25 2005}" >o 2>e &&
 	echo "$C" >expect &&
 	test_cmp expect o &&
-	echo "warning: log for '\''master'\'' only goes back to $ed" >expect &&
+	echo "warning: log for '\''main'\'' only goes back to $ed" >expect &&
 	test_i18ncmp expect e
 '
-test_expect_success 'Query master@{2005-05-25} (before history)' '
+test_expect_success 'Query main@{2005-05-25} (before history)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify master@{2005-05-25} >o 2>e &&
+	git rev-parse --verify main@{2005-05-25} >o 2>e &&
 	echo "$C" >expect &&
 	test_cmp expect o &&
-	echo "warning: log for '\''master'\'' only goes back to $ed" >expect &&
+	echo "warning: log for '\''main'\'' only goes back to $ed" >expect &&
 	test_i18ncmp expect e
 '
-test_expect_success 'Query "master@{May 26 2005 23:31:59}" (1 second before history)' '
+test_expect_success 'Query "main@{May 26 2005 23:31:59}" (1 second before history)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{May 26 2005 23:31:59}" >o 2>e &&
+	git rev-parse --verify "main@{May 26 2005 23:31:59}" >o 2>e &&
 	echo "$C" >expect &&
 	test_cmp expect o &&
-	echo "warning: log for '\''master'\'' only goes back to $ed" >expect &&
+	echo "warning: log for '\''main'\'' only goes back to $ed" >expect &&
 	test_i18ncmp expect e
 '
-test_expect_success 'Query "master@{May 26 2005 23:32:00}" (exactly history start)' '
+test_expect_success 'Query "main@{May 26 2005 23:32:00}" (exactly history start)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{May 26 2005 23:32:00}" >o 2>e &&
+	git rev-parse --verify "main@{May 26 2005 23:32:00}" >o 2>e &&
 	echo "$C" >expect &&
 	test_cmp expect o &&
 	test_must_be_empty e
 '
-test_expect_success 'Query "master@{May 26 2005 23:32:30}" (first non-creation change)' '
+test_expect_success 'Query "main@{May 26 2005 23:32:30}" (first non-creation change)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{May 26 2005 23:32:30}" >o 2>e &&
+	git rev-parse --verify "main@{May 26 2005 23:32:30}" >o 2>e &&
 	echo "$A" >expect &&
 	test_cmp expect o &&
 	test_must_be_empty e
 '
-test_expect_success 'Query "master@{2005-05-26 23:33:01}" (middle of history with gap)' '
+test_expect_success 'Query "main@{2005-05-26 23:33:01}" (middle of history with gap)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{2005-05-26 23:33:01}" >o 2>e &&
+	git rev-parse --verify "main@{2005-05-26 23:33:01}" >o 2>e &&
 	echo "$B" >expect &&
 	test_cmp expect o &&
 	test_i18ngrep -F "warning: log for ref $m has gap after $gd" e
 '
-test_expect_success 'Query "master@{2005-05-26 23:38:00}" (middle of history)' '
+test_expect_success 'Query "main@{2005-05-26 23:38:00}" (middle of history)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{2005-05-26 23:38:00}" >o 2>e &&
+	git rev-parse --verify "main@{2005-05-26 23:38:00}" >o 2>e &&
 	echo "$Z" >expect &&
 	test_cmp expect o &&
 	test_must_be_empty e
 '
-test_expect_success 'Query "master@{2005-05-26 23:43:00}" (exact end of history)' '
+test_expect_success 'Query "main@{2005-05-26 23:43:00}" (exact end of history)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{2005-05-26 23:43:00}" >o 2>e &&
+	git rev-parse --verify "main@{2005-05-26 23:43:00}" >o 2>e &&
 	echo "$E" >expect &&
 	test_cmp expect o &&
 	test_must_be_empty e
 '
-test_expect_success 'Query "master@{2005-05-28}" (past end of history)' '
+test_expect_success 'Query "main@{2005-05-28}" (past end of history)' '
 	test_when_finished "rm -f o e" &&
-	git rev-parse --verify "master@{2005-05-28}" >o 2>e &&
+	git rev-parse --verify "main@{2005-05-28}" >o 2>e &&
 	echo "$D" >expect &&
 	test_cmp expect o &&
 	test_i18ngrep -F "warning: log for ref $m unexpectedly ended on $ld" e
@@ -467,14 +468,14 @@ test_expect_success 'git commit logged updates' '
 '
 unset h_TEST h_OTHER h_FIXED h_MERGED
 
-test_expect_success 'git cat-file blob master:F (expect OTHER)' '
-	test OTHER = $(git cat-file blob master:F)
+test_expect_success 'git cat-file blob main:F (expect OTHER)' '
+	test OTHER = $(git cat-file blob main:F)
 '
-test_expect_success 'git cat-file blob master@{2005-05-26 23:30}:F (expect TEST)' '
-	test TEST = $(git cat-file blob "master@{2005-05-26 23:30}:F")
+test_expect_success 'git cat-file blob main@{2005-05-26 23:30}:F (expect TEST)' '
+	test TEST = $(git cat-file blob "main@{2005-05-26 23:30}:F")
 '
-test_expect_success 'git cat-file blob master@{2005-05-26 23:42}:F (expect OTHER)' '
-	test OTHER = $(git cat-file blob "master@{2005-05-26 23:42}:F")
+test_expect_success 'git cat-file blob main@{2005-05-26 23:42}:F (expect OTHER)' '
+	test OTHER = $(git cat-file blob "main@{2005-05-26 23:42}:F")
 '
 
 # Test adding and deleting pseudorefs
@@ -586,21 +587,21 @@ test_expect_success 'stdin fails on unknown command' '
 '
 
 test_expect_success 'stdin fails on unbalanced quotes' '
-	echo "create $a \"master" >stdin &&
+	echo "create $a \"main" >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
-	grep "fatal: badly quoted argument: \\\"master" err
+	grep "fatal: badly quoted argument: \\\"main" err
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'stdin fails on invalid escape' '
+test_expect_success 'stdin fails on invalid escape' '
 	echo "create $a \"ma\zn\"" >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
 	grep "fatal: badly quoted argument: \\\"ma\\\\zn\\\"" err
 '
 
 test_expect_success 'stdin fails on junk after quoted argument' '
-	echo "create \"$a\"master" >stdin &&
+	echo "create \"$a\"main" >stdin &&
 	test_must_fail git update-ref --stdin <stdin 2>err &&
-	grep "fatal: unexpected character after quoted argument: \\\"$a\\\"master" err
+	grep "fatal: unexpected character after quoted argument: \\\"$a\\\"main" err
 '
 
 test_expect_success 'stdin fails create with no ref' '
@@ -710,7 +711,7 @@ test_expect_success 'stdin succeeds with quoted argument' '
 	test_cmp expect actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'stdin succeeds with escaped character' '
+test_expect_success 'stdin succeeds with escaped character' '
 	git update-ref -d $a &&
 	echo "create $a \"ma\\151n\"" >stdin &&
 	git update-ref --stdin <stdin &&
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index a0b832d59e..3ec3e1d730 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -12,6 +12,7 @@ test_expect_success 'prepare a trivial repository' '
 	echo Hello >A &&
 	git update-index --add A &&
 	git commit -m "Initial commit." &&
+	git branch -M main &&
 	echo World >>A &&
 	git update-index --add A &&
 	git commit -m "Second commit." &&
@@ -27,8 +28,8 @@ test_expect_success 'branch -h in broken repository' '
 	mkdir broken &&
 	(
 		cd broken &&
-		git init &&
-		>.git/refs/heads/master &&
+		git init -b main &&
+		>.git/refs/heads/main &&
 		test_expect_code 129 git branch -h >usage 2>&1
 	) &&
 	test_i18ngrep "[Uu]sage" broken/usage
@@ -42,8 +43,8 @@ test_expect_success 'git branch a/b/c should create a branch' '
 	git branch a/b/c && test_path_is_file .git/refs/heads/a/b/c
 '
 
-test_expect_success 'git branch mb master... should create a branch' '
-	git branch mb master... && test_path_is_file .git/refs/heads/mb
+test_expect_success 'git branch mb main... should create a branch' '
+	git branch mb main... && test_path_is_file .git/refs/heads/mb
 '
 
 test_expect_success 'git branch HEAD should fail' '
@@ -51,7 +52,7 @@ test_expect_success 'git branch HEAD should fail' '
 '
 
 cat >expect <<EOF
-$ZERO_OID $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000	branch: Created from master
+$ZERO_OID $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000	branch: Created from main
 EOF
 test_expect_success 'git branch --create-reflog d/e/f should create a branch and a log' '
 	GIT_COMMITTER_DATE="2005-05-26 23:30" \
@@ -110,7 +111,7 @@ test_expect_success 'git branch -m n/n n should work' '
 
 test_expect_success 'git branch -m bbb should rename checked out branch' '
 	test_when_finished git branch -D bbb &&
-	test_when_finished git checkout master &&
+	test_when_finished git checkout main &&
 	git checkout -b aaa &&
 	git commit --allow-empty -m "a new commit" &&
 	git rev-parse aaa@{0} >expect &&
@@ -124,7 +125,7 @@ test_expect_success 'git branch -m bbb should rename checked out branch' '
 
 test_expect_success 'renaming checked out branch works with d/f conflict' '
 	test_when_finished "git branch -D foo/bar || git branch -D foo" &&
-	test_when_finished git checkout master &&
+	test_when_finished git checkout main &&
 	git checkout -b foo &&
 	git branch -m foo/bar &&
 	git symbolic-ref HEAD >actual &&
@@ -178,14 +179,14 @@ test_expect_success 'git branch -M baz bam should add entries to .git/logs/HEAD'
 '
 
 test_expect_success 'git branch -M should leave orphaned HEAD alone' '
-	git init orphan &&
+	git init -b main orphan &&
 	(
 		cd orphan &&
 		test_commit initial &&
 		git checkout --orphan lonely &&
 		grep lonely .git/HEAD &&
 		test_path_is_missing .git/refs/head/lonely &&
-		git branch -M master mistress &&
+		git branch -M main mistress &&
 		grep lonely .git/HEAD
 	)
 '
@@ -201,7 +202,7 @@ test_expect_success 'resulting reflog can be shown by log -g' '
 '
 
 test_expect_success 'git branch -M baz bam should succeed when baz is checked out as linked working tree' '
-	git checkout master &&
+	git checkout main &&
 	git worktree add -b baz bazdir &&
 	git worktree add -f bazdir2 baz &&
 	git branch -M baz bam &&
@@ -224,18 +225,18 @@ test_expect_success 'git branch -M baz bam should succeed within a worktree in w
 	git worktree prune
 '
 
-test_expect_success 'git branch -M master should work when master is checked out' '
-	git checkout master &&
-	git branch -M master
+test_expect_success 'git branch -M main should work when main is checked out' '
+	git checkout main &&
+	git branch -M main
 '
 
-test_expect_success 'git branch -M master master should work when master is checked out' '
-	git checkout master &&
-	git branch -M master master
+test_expect_success 'git branch -M main main should work when main is checked out' '
+	git checkout main &&
+	git branch -M main main
 '
 
-test_expect_success 'git branch -M topic topic should work when master is checked out' '
-	git checkout master &&
+test_expect_success 'git branch -M topic topic should work when main is checked out' '
+	git checkout main &&
 	git branch topic &&
 	git branch -M topic topic
 '
@@ -289,11 +290,11 @@ test_expect_success 'deleting checked-out branch from repo that is a submodule'
 test_expect_success 'bare main worktree has HEAD at branch deleted by secondary worktree' '
 	test_when_finished "rm -rf nonbare base secondary" &&
 
-	git init nonbare &&
+	git init -b main nonbare &&
 	test_commit -C nonbare x &&
 	git clone --bare nonbare bare &&
-	git -C bare worktree add --detach ../secondary master &&
-	git -C secondary branch -D master
+	git -C bare worktree add --detach ../secondary main &&
+	git -C secondary branch -D main
 '
 
 test_expect_success 'git branch --list -v with --abbrev' '
@@ -321,7 +322,7 @@ test_expect_success 'git branch --list -v with --abbrev' '
 
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'git branch --column' '
+test_expect_success 'git branch --column' '
 	COLUMNS=81 git branch --column=column >actual &&
 	cat >expect <<\EOF &&
   a/b/c   bam     foo     l     * main    n       o/p     r
@@ -345,7 +346,7 @@ test_expect_success 'git branch --column with an extremely long branch name' '
   j/k
   l
   m/m
-* master
+* main
   mb
   n
   o/o
@@ -358,7 +359,7 @@ EOF
 	test_cmp expect actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'git branch with column.*' '
+test_expect_success 'git branch with column.*' '
 	git config column.ui column &&
 	git config column.branch "dense" &&
 	COLUMNS=80 git branch >actual &&
@@ -375,7 +376,7 @@ test_expect_success 'git branch --column -v should fail' '
 	test_must_fail git branch --column -v
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'git branch -v with column.ui ignored' '
+test_expect_success 'git branch -v with column.ui ignored' '
 	git config column.ui column &&
 	COLUMNS=80 git branch -v | cut -c -8 | sed "s/ *$//" >actual &&
 	git config --unset column.ui &&
@@ -388,7 +389,7 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH 'git branch -v with column.ui ignore
   j/k
   l
   m/m
-* master
+* main
   mb
   n
   o/o
@@ -427,8 +428,8 @@ test_expect_success 'config information was renamed, too' '
 '
 
 test_expect_success 'git branch -m correctly renames multiple config sections' '
-	test_when_finished "git checkout master" &&
-	git checkout -b source master &&
+	test_when_finished "git checkout main" &&
+	git checkout -b source main &&
 
 	# Assert that a config file with multiple config sections has
 	# those sections preserved...
@@ -587,18 +588,18 @@ test_expect_success 'git branch -C c1 c2 should never touch HEAD' '
 	! grep "$msg$" .git/logs/HEAD
 '
 
-test_expect_success 'git branch -C master should work when master is checked out' '
-	git checkout master &&
-	git branch -C master
+test_expect_success 'git branch -C main should work when main is checked out' '
+	git checkout main &&
+	git branch -C main
 '
 
-test_expect_success 'git branch -C master master should work when master is checked out' '
-	git checkout master &&
-	git branch -C master master
+test_expect_success 'git branch -C main main should work when main is checked out' '
+	git checkout main &&
+	git branch -C main main
 '
 
-test_expect_success 'git branch -C main5 main5 should work when master is checked out' '
-	git checkout master &&
+test_expect_success 'git branch -C main5 main5 should work when main is checked out' '
+	git checkout main &&
 	git branch main5 &&
 	git branch -C main5 main5
 '
@@ -620,8 +621,8 @@ test_expect_success 'git branch -C ab cd should overwrite existing config for cd
 test_expect_success 'git branch -c correctly copies multiple config sections' '
 	FOO=1 &&
 	export FOO &&
-	test_when_finished "git checkout master" &&
-	git checkout -b source2 master &&
+	test_when_finished "git checkout main" &&
+	git checkout -b source2 main &&
 
 	# Assert that a config file with multiple config sections has
 	# those sections preserved...
@@ -711,10 +712,10 @@ test_expect_success 'deleting a self-referential symref' '
 '
 
 test_expect_success 'renaming a symref is not allowed' '
-	git symbolic-ref refs/heads/topic refs/heads/master &&
+	git symbolic-ref refs/heads/topic refs/heads/main &&
 	test_must_fail git branch -m topic new-topic &&
 	git symbolic-ref refs/heads/topic &&
-	test_path_is_file .git/refs/heads/master &&
+	test_path_is_file .git/refs/heads/main &&
 	test_path_is_missing .git/refs/heads/new-topic
 '
 
@@ -728,27 +729,27 @@ test_expect_success SYMLINKS 'git branch -m u v should fail when the reflog for
 test_expect_success 'test tracking setup via --track' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track my1 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track my1 local/main &&
 	test $(git config branch.my1.remote) = local &&
-	test $(git config branch.my1.merge) = refs/heads/master
+	test $(git config branch.my1.merge) = refs/heads/main
 '
 
 test_expect_success 'test tracking setup (non-wildcard, matching)' '
 	git config remote.local.url . &&
-	git config remote.local.fetch refs/heads/master:refs/remotes/local/master &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track my4 local/master &&
+	git config remote.local.fetch refs/heads/main:refs/remotes/local/main &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track my4 local/main &&
 	test $(git config branch.my4.remote) = local &&
-	test $(git config branch.my4.merge) = refs/heads/master
+	test $(git config branch.my4.merge) = refs/heads/main
 '
 
 test_expect_success 'tracking setup fails on non-matching refspec' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
 	git config remote.local.fetch refs/heads/s:refs/remotes/local/s &&
-	test_must_fail git branch --track my5 local/master &&
+	test_must_fail git branch --track my5 local/main &&
 	test_must_fail git config branch.my5.remote &&
 	test_must_fail git config branch.my5.merge
 '
@@ -757,21 +758,21 @@ test_expect_success 'test tracking setup via config' '
 	git config branch.autosetupmerge true &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch my3 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch my3 local/main &&
 	test $(git config branch.my3.remote) = local &&
-	test $(git config branch.my3.merge) = refs/heads/master
+	test $(git config branch.my3.merge) = refs/heads/main
 '
 
 test_expect_success 'test overriding tracking setup via --no-track' '
 	git config branch.autosetupmerge true &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --no-track my2 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --no-track my2 local/main &&
 	git config branch.autosetupmerge false &&
 	! test "$(git config branch.my2.remote)" = local &&
-	! test "$(git config branch.my2.merge)" = refs/heads/master
+	! test "$(git config branch.my2.merge)" = refs/heads/main
 '
 
 test_expect_success 'no tracking without .fetch entries' '
@@ -836,26 +837,26 @@ test_expect_success 'branch from tag w/--track causes failure' '
 
 test_expect_success '--set-upstream-to fails on multiple branches' '
 	echo "fatal: too many arguments to set new upstream" >expect &&
-	test_must_fail git branch --set-upstream-to master a b c 2>err &&
+	test_must_fail git branch --set-upstream-to main a b c 2>err &&
 	test_i18ncmp expect err
 '
 
 test_expect_success '--set-upstream-to fails on detached HEAD' '
 	git checkout HEAD^{} &&
 	test_when_finished git checkout - &&
-	echo "fatal: could not set upstream of HEAD to master when it does not point to any branch." >expect &&
-	test_must_fail git branch --set-upstream-to master 2>err &&
+	echo "fatal: could not set upstream of HEAD to main when it does not point to any branch." >expect &&
+	test_must_fail git branch --set-upstream-to main 2>err &&
 	test_i18ncmp expect err
 '
 
 test_expect_success '--set-upstream-to fails on a missing dst branch' '
 	echo "fatal: branch '"'"'does-not-exist'"'"' does not exist" >expect &&
-	test_must_fail git branch --set-upstream-to master does-not-exist 2>err &&
+	test_must_fail git branch --set-upstream-to main does-not-exist 2>err &&
 	test_i18ncmp expect err
 '
 
 test_expect_success '--set-upstream-to fails on a missing src branch' '
-	test_must_fail git branch --set-upstream-to does-not-exist master 2>err &&
+	test_must_fail git branch --set-upstream-to does-not-exist main 2>err &&
 	test_i18ngrep "the requested upstream branch '"'"'does-not-exist'"'"' does not exist" err
 '
 
@@ -874,20 +875,20 @@ test_expect_success '--set-upstream-to fails on locked config' '
 '
 
 test_expect_success 'use --set-upstream-to modify HEAD' '
-	test_config branch.master.remote foo &&
-	test_config branch.master.merge foo &&
+	test_config branch.main.remote foo &&
+	test_config branch.main.merge foo &&
 	git branch my12 &&
 	git branch --set-upstream-to my12 &&
-	test "$(git config branch.master.remote)" = "." &&
-	test "$(git config branch.master.merge)" = "refs/heads/my12"
+	test "$(git config branch.main.remote)" = "." &&
+	test "$(git config branch.main.merge)" = "refs/heads/my12"
 '
 
 test_expect_success 'use --set-upstream-to modify a particular branch' '
 	git branch my13 &&
-	git branch --set-upstream-to master my13 &&
+	git branch --set-upstream-to main my13 &&
 	test_when_finished "git branch --unset-upstream my13" &&
 	test "$(git config branch.my13.remote)" = "." &&
-	test "$(git config branch.my13.merge)" = "refs/heads/master"
+	test "$(git config branch.my13.merge)" = "refs/heads/main"
 '
 
 test_expect_success '--unset-upstream should fail if given a non-existent branch' '
@@ -906,14 +907,14 @@ test_expect_success '--unset-upstream should fail if config is locked' '
 
 test_expect_success 'test --unset-upstream on HEAD' '
 	git branch my14 &&
-	test_config branch.master.remote foo &&
-	test_config branch.master.merge foo &&
+	test_config branch.main.remote foo &&
+	test_config branch.main.merge foo &&
 	git branch --set-upstream-to my14 &&
 	git branch --unset-upstream &&
-	test_must_fail git config branch.master.remote &&
-	test_must_fail git config branch.master.merge &&
+	test_must_fail git config branch.main.remote &&
+	test_must_fail git config branch.main.merge &&
 	# fail for a branch without upstream set
-	echo "fatal: Branch '"'"'master'"'"' has no upstream information" >expect &&
+	echo "fatal: Branch '"'"'main'"'"' has no upstream information" >expect &&
 	test_must_fail git branch --unset-upstream 2>err &&
 	test_i18ncmp expect err
 '
@@ -934,14 +935,14 @@ test_expect_success '--unset-upstream should fail on detached HEAD' '
 
 test_expect_success 'test --unset-upstream on a particular branch' '
 	git branch my15 &&
-	git branch --set-upstream-to master my14 &&
+	git branch --set-upstream-to main my14 &&
 	git branch --unset-upstream my14 &&
 	test_must_fail git config branch.my14.remote &&
 	test_must_fail git config branch.my14.merge
 '
 
 test_expect_success 'disabled option --set-upstream fails' '
-	test_must_fail git branch --set-upstream origin/master
+	test_must_fail git branch --set-upstream origin/main
 '
 
 test_expect_success '--set-upstream-to notices an error to set branch as own upstream' '
@@ -956,32 +957,32 @@ test_expect_success '--set-upstream-to notices an error to set branch as own ups
 
 # Keep this test last, as it changes the current branch
 cat >expect <<EOF
-$ZERO_OID $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000	branch: Created from master
+$ZERO_OID $HEAD $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL> 1117150200 +0000	branch: Created from main
 EOF
 test_expect_success 'git checkout -b g/h/i -l should create a branch and a log' '
 	GIT_COMMITTER_DATE="2005-05-26 23:30" \
-	git checkout -b g/h/i -l master &&
+	git checkout -b g/h/i -l main &&
 	test_path_is_file .git/refs/heads/g/h/i &&
 	test_path_is_file .git/logs/refs/heads/g/h/i &&
 	test_cmp expect .git/logs/refs/heads/g/h/i
 '
 
 test_expect_success 'checkout -b makes reflog by default' '
-	git checkout master &&
+	git checkout main &&
 	git config --unset core.logAllRefUpdates &&
 	git checkout -b alpha &&
 	git rev-parse --verify alpha@{0}
 '
 
 test_expect_success 'checkout -b does not make reflog when core.logAllRefUpdates = false' '
-	git checkout master &&
+	git checkout main &&
 	git config core.logAllRefUpdates false &&
 	git checkout -b beta &&
 	test_must_fail git rev-parse --verify beta@{0}
 '
 
 test_expect_success 'checkout -b with -l makes reflog when core.logAllRefUpdates = false' '
-	git checkout master &&
+	git checkout main &&
 	git checkout -lb gamma &&
 	git config --unset core.logAllRefUpdates &&
 	git rev-parse --verify gamma@{0}
@@ -990,10 +991,10 @@ test_expect_success 'checkout -b with -l makes reflog when core.logAllRefUpdates
 test_expect_success 'avoid ambiguous track' '
 	git config branch.autosetupmerge true &&
 	git config remote.ambi1.url lalala &&
-	git config remote.ambi1.fetch refs/heads/lalala:refs/heads/master &&
+	git config remote.ambi1.fetch refs/heads/lalala:refs/heads/main &&
 	git config remote.ambi2.url lilili &&
-	git config remote.ambi2.fetch refs/heads/lilili:refs/heads/master &&
-	test_must_fail git branch all1 master &&
+	git config remote.ambi2.fetch refs/heads/lilili:refs/heads/main &&
+	test_must_fail git branch all1 main &&
 	test -z "$(git config branch.all1.merge)"
 '
 
@@ -1049,10 +1050,10 @@ test_expect_success 'autosetuprebase local on a tracked remote branch' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
 	git config branch.autosetuprebase local &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track myr5 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track myr5 local/main &&
 	test "$(git config branch.myr5.remote)" = local &&
-	test "$(git config branch.myr5.merge)" = refs/heads/master &&
+	test "$(git config branch.myr5.merge)" = refs/heads/main &&
 	! test "$(git config branch.myr5.rebase)" = true
 '
 
@@ -1060,10 +1061,10 @@ test_expect_success 'autosetuprebase never on a tracked remote branch' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
 	git config branch.autosetuprebase never &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track myr6 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track myr6 local/main &&
 	test "$(git config branch.myr6.remote)" = local &&
-	test "$(git config branch.myr6.merge)" = refs/heads/master &&
+	test "$(git config branch.myr6.merge)" = refs/heads/main &&
 	! test "$(git config branch.myr6.rebase)" = true
 '
 
@@ -1071,10 +1072,10 @@ test_expect_success 'autosetuprebase remote on a tracked remote branch' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
 	git config branch.autosetuprebase remote &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track myr7 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track myr7 local/main &&
 	test "$(git config branch.myr7.remote)" = local &&
-	test "$(git config branch.myr7.merge)" = refs/heads/master &&
+	test "$(git config branch.myr7.merge)" = refs/heads/main &&
 	test "$(git config branch.myr7.rebase)" = true
 '
 
@@ -1082,10 +1083,10 @@ test_expect_success 'autosetuprebase always on a tracked remote branch' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
 	git config branch.autosetuprebase remote &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track myr8 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track myr8 local/main &&
 	test "$(git config branch.myr8.remote)" = local &&
-	test "$(git config branch.myr8.merge)" = refs/heads/master &&
+	test "$(git config branch.myr8.merge)" = refs/heads/main &&
 	test "$(git config branch.myr8.rebase)" = true
 '
 
@@ -1093,10 +1094,10 @@ test_expect_success 'autosetuprebase unconfigured on a tracked remote branch' '
 	git config --unset branch.autosetuprebase &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --track myr9 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --track myr9 local/main &&
 	test "$(git config branch.myr9.remote)" = local &&
-	test "$(git config branch.myr9.merge)" = refs/heads/master &&
+	test "$(git config branch.myr9.merge)" = refs/heads/main &&
 	test "z$(git config branch.myr9.rebase)" = z
 '
 
@@ -1114,7 +1115,7 @@ test_expect_success 'autosetuprebase unconfigured on a tracked local branch' '
 test_expect_success 'autosetuprebase unconfigured on untracked local branch' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
 	git branch --no-track myr11 mybase2 &&
 	test "z$(git config branch.myr11.remote)" = z &&
 	test "z$(git config branch.myr11.merge)" = z &&
@@ -1124,8 +1125,8 @@ test_expect_success 'autosetuprebase unconfigured on untracked local branch' '
 test_expect_success 'autosetuprebase unconfigured on untracked remote branch' '
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --no-track myr12 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --no-track myr12 local/main &&
 	test "z$(git config branch.myr12.remote)" = z &&
 	test "z$(git config branch.myr12.merge)" = z &&
 	test "z$(git config branch.myr12.rebase)" = z
@@ -1135,7 +1136,7 @@ test_expect_success 'autosetuprebase never on an untracked local branch' '
 	git config branch.autosetuprebase never &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
 	git branch --no-track myr13 mybase2 &&
 	test "z$(git config branch.myr13.remote)" = z &&
 	test "z$(git config branch.myr13.merge)" = z &&
@@ -1146,7 +1147,7 @@ test_expect_success 'autosetuprebase local on an untracked local branch' '
 	git config branch.autosetuprebase local &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
 	git branch --no-track myr14 mybase2 &&
 	test "z$(git config branch.myr14.remote)" = z &&
 	test "z$(git config branch.myr14.merge)" = z &&
@@ -1157,7 +1158,7 @@ test_expect_success 'autosetuprebase remote on an untracked local branch' '
 	git config branch.autosetuprebase remote &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
 	git branch --no-track myr15 mybase2 &&
 	test "z$(git config branch.myr15.remote)" = z &&
 	test "z$(git config branch.myr15.merge)" = z &&
@@ -1168,7 +1169,7 @@ test_expect_success 'autosetuprebase always on an untracked local branch' '
 	git config branch.autosetuprebase always &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
 	git branch --no-track myr16 mybase2 &&
 	test "z$(git config branch.myr16.remote)" = z &&
 	test "z$(git config branch.myr16.merge)" = z &&
@@ -1179,8 +1180,8 @@ test_expect_success 'autosetuprebase never on an untracked remote branch' '
 	git config branch.autosetuprebase never &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --no-track myr17 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --no-track myr17 local/main &&
 	test "z$(git config branch.myr17.remote)" = z &&
 	test "z$(git config branch.myr17.merge)" = z &&
 	test "z$(git config branch.myr17.rebase)" = z
@@ -1190,8 +1191,8 @@ test_expect_success 'autosetuprebase local on an untracked remote branch' '
 	git config branch.autosetuprebase local &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --no-track myr18 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --no-track myr18 local/main &&
 	test "z$(git config branch.myr18.remote)" = z &&
 	test "z$(git config branch.myr18.merge)" = z &&
 	test "z$(git config branch.myr18.rebase)" = z
@@ -1201,8 +1202,8 @@ test_expect_success 'autosetuprebase remote on an untracked remote branch' '
 	git config branch.autosetuprebase remote &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --no-track myr19 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --no-track myr19 local/main &&
 	test "z$(git config branch.myr19.remote)" = z &&
 	test "z$(git config branch.myr19.merge)" = z &&
 	test "z$(git config branch.myr19.rebase)" = z
@@ -1212,8 +1213,8 @@ test_expect_success 'autosetuprebase always on an untracked remote branch' '
 	git config branch.autosetuprebase always &&
 	git config remote.local.url . &&
 	git config remote.local.fetch refs/heads/*:refs/remotes/local/* &&
-	(git show-ref -q refs/remotes/local/master || git fetch local) &&
-	git branch --no-track myr20 local/master &&
+	(git show-ref -q refs/remotes/local/main || git fetch local) &&
+	git branch --no-track myr20 local/main &&
 	test "z$(git config branch.myr20.remote)" = z &&
 	test "z$(git config branch.myr20.merge)" = z &&
 	test "z$(git config branch.myr20.rebase)" = z
@@ -1221,7 +1222,7 @@ test_expect_success 'autosetuprebase always on an untracked remote branch' '
 
 test_expect_success 'autosetuprebase always on detached HEAD' '
 	git config branch.autosetupmerge always &&
-	test_when_finished git checkout master &&
+	test_when_finished git checkout main &&
 	git checkout HEAD^0 &&
 	git branch my11 &&
 	test -z "$(git config branch.my11.remote)" &&
@@ -1249,18 +1250,18 @@ test_expect_success 'attempt to delete a branch without base and unmerged to HEA
 test_expect_success 'attempt to delete a branch merged to its base' '
 	# we are on my9 which is the initial commit; traditionally
 	# we would not have allowed deleting my8 that is not merged
-	# to my9, but it is set to track master that already has my8
-	git config branch.my8.merge refs/heads/master &&
+	# to my9, but it is set to track main that already has my8
+	git config branch.my8.merge refs/heads/main &&
 	git branch -d my8
 '
 
 test_expect_success 'attempt to delete a branch merged to its base' '
-	git checkout master &&
+	git checkout main &&
 	echo Third >>A &&
 	git commit -m "Third commit" A &&
 	git branch -t my10 my9 &&
 	git branch -f my10 HEAD^ &&
-	# we are on master which is at the third commit, and my10
+	# we are on main which is at the third commit, and my10
 	# is behind us, so traditionally we would have allowed deleting
 	# it; but my10 is set to track my9 that is further behind.
 	test_must_fail git branch -d my10
@@ -1287,7 +1288,7 @@ test_expect_success 'detect typo in branch name when using --edit-description' '
 '
 
 test_expect_success 'refuse --edit-description on unborn branch for now' '
-	test_when_finished "git checkout master" &&
+	test_when_finished "git checkout main" &&
 	write_script editor <<-\EOF &&
 		echo "New contents" >"$1"
 	EOF
@@ -1301,18 +1302,18 @@ test_expect_success '--merged catches invalid object names' '
 
 test_expect_success '--list during rebase' '
 	test_when_finished "reset_rebase" &&
-	git checkout master &&
+	git checkout main &&
 	FAKE_LINES="1 edit 2" &&
 	export FAKE_LINES &&
 	set_fake_editor &&
 	git rebase -i HEAD~2 &&
 	git branch --list >actual &&
-	test_i18ngrep "rebasing master" actual
+	test_i18ngrep "rebasing main" actual
 '
 
 test_expect_success '--list during rebase from detached HEAD' '
-	test_when_finished "reset_rebase && git checkout master" &&
-	git checkout master^0 &&
+	test_when_finished "reset_rebase && git checkout main" &&
+	git checkout main^0 &&
 	oid=$(git rev-parse --short HEAD) &&
 	FAKE_LINES="1 edit 2" &&
 	export FAKE_LINES &&
@@ -1324,17 +1325,17 @@ test_expect_success '--list during rebase from detached HEAD' '
 
 test_expect_success 'tracking with unexpected .fetch refspec' '
 	rm -rf a b c d &&
-	git init a &&
+	git init -b main a &&
 	(
 		cd a &&
 		test_commit a
 	) &&
-	git init b &&
+	git init -b main b &&
 	(
 		cd b &&
 		test_commit b
 	) &&
-	git init c &&
+	git init -b main c &&
 	(
 		cd c &&
 		test_commit c &&
@@ -1342,23 +1343,23 @@ test_expect_success 'tracking with unexpected .fetch refspec' '
 		git remote add b ../b &&
 		git fetch --all
 	) &&
-	git init d &&
+	git init -b main d &&
 	(
 		cd d &&
 		git remote add c ../c &&
 		git config remote.c.fetch "+refs/remotes/*:refs/remotes/*" &&
 		git fetch c &&
-		git branch --track local/a/master remotes/a/master &&
-		test "$(git config branch.local/a/master.remote)" = "c" &&
-		test "$(git config branch.local/a/master.merge)" = "refs/remotes/a/master" &&
+		git branch --track local/a/main remotes/a/main &&
+		test "$(git config branch.local/a/main.remote)" = "c" &&
+		test "$(git config branch.local/a/main.merge)" = "refs/remotes/a/main" &&
 		git rev-parse --verify a >expect &&
-		git rev-parse --verify local/a/master >actual &&
+		git rev-parse --verify local/a/main >actual &&
 		test_cmp expect actual
 	)
 '
 
 test_expect_success 'configured committerdate sort' '
-	git init sort &&
+	git init -b main sort &&
 	(
 		cd sort &&
 		git config branch.sort committerdate &&
@@ -1371,7 +1372,7 @@ test_expect_success 'configured committerdate sort' '
 		test_commit b &&
 		git branch >actual &&
 		cat >expect <<-\EOF &&
-		  master
+		  main
 		  a
 		  c
 		* b
@@ -1389,7 +1390,7 @@ test_expect_success 'option override configured sort' '
 		  a
 		* b
 		  c
-		  master
+		  main
 		EOF
 		test_cmp expect actual
 	)
diff --git a/t/t3201-branch-contains.sh b/t/t3201-branch-contains.sh
index 3733cd0091..6c1ab69ca6 100755
--- a/t/t3201-branch-contains.sh
+++ b/t/t3201-branch-contains.sh
@@ -10,51 +10,52 @@ test_expect_success setup '
 	git add file &&
 	test_tick &&
 	git commit -m initial &&
+	git branch -M main &&
 	git branch side &&
 
 	echo 1 >file &&
 	test_tick &&
-	git commit -a -m "second on master" &&
+	git commit -a -m "second on main" &&
 
 	git checkout side &&
 	echo 1 >file &&
 	test_tick &&
 	git commit -a -m "second on side" &&
 
-	git merge master
+	git merge main
 
 '
 
-test_expect_success 'branch --contains=master' '
+test_expect_success 'branch --contains=main' '
 
-	git branch --contains=master >actual &&
+	git branch --contains=main >actual &&
 	{
-		echo "  master" && echo "* side"
+		echo "  main" && echo "* side"
 	} >expect &&
 	test_cmp expect actual
 
 '
 
-test_expect_success 'branch --contains master' '
+test_expect_success 'branch --contains main' '
 
-	git branch --contains master >actual &&
+	git branch --contains main >actual &&
 	{
-		echo "  master" && echo "* side"
+		echo "  main" && echo "* side"
 	} >expect &&
 	test_cmp expect actual
 
 '
 
-test_expect_success 'branch --no-contains=master' '
+test_expect_success 'branch --no-contains=main' '
 
-	git branch --no-contains=master >actual &&
+	git branch --no-contains=main >actual &&
 	test_must_be_empty actual
 
 '
 
-test_expect_success 'branch --no-contains master' '
+test_expect_success 'branch --no-contains main' '
 
-	git branch --no-contains master >actual &&
+	git branch --no-contains main >actual &&
 	test_must_be_empty actual
 
 '
@@ -73,7 +74,7 @@ test_expect_success 'branch --no-contains=side' '
 
 	git branch --no-contains=side >actual &&
 	{
-		echo "  master"
+		echo "  main"
 	} >expect &&
 	test_cmp expect actual
 
@@ -81,9 +82,9 @@ test_expect_success 'branch --no-contains=side' '
 
 test_expect_success 'branch --contains with pattern implies --list' '
 
-	git branch --contains=master master >actual &&
+	git branch --contains=main main >actual &&
 	{
-		echo "  master"
+		echo "  main"
 	} >expect &&
 	test_cmp expect actual
 
@@ -91,7 +92,7 @@ test_expect_success 'branch --contains with pattern implies --list' '
 
 test_expect_success 'branch --no-contains with pattern implies --list' '
 
-	git branch --no-contains=master master >actual &&
+	git branch --no-contains=main main >actual &&
 	test_must_be_empty actual
 
 '
@@ -100,7 +101,7 @@ test_expect_success 'side: branch --merged' '
 
 	git branch --merged >actual &&
 	{
-		echo "  master" &&
+		echo "  main" &&
 		echo "* side"
 	} >expect &&
 	test_cmp expect actual
@@ -109,9 +110,9 @@ test_expect_success 'side: branch --merged' '
 
 test_expect_success 'branch --merged with pattern implies --list' '
 
-	git branch --merged=side master >actual &&
+	git branch --merged=side main >actual &&
 	{
-		echo "  master"
+		echo "  main"
 	} >expect &&
 	test_cmp expect actual
 
@@ -124,18 +125,18 @@ test_expect_success 'side: branch --no-merged' '
 
 '
 
-test_expect_success 'master: branch --merged' '
+test_expect_success 'main: branch --merged' '
 
-	git checkout master &&
+	git checkout main &&
 	git branch --merged >actual &&
 	{
-		echo "* master"
+		echo "* main"
 	} >expect &&
 	test_cmp expect actual
 
 '
 
-test_expect_success 'master: branch --no-merged' '
+test_expect_success 'main: branch --no-merged' '
 
 	git branch --no-merged >actual &&
 	{
@@ -147,22 +148,22 @@ test_expect_success 'master: branch --no-merged' '
 
 test_expect_success 'branch --no-merged with pattern implies --list' '
 
-	git branch --no-merged=master master >actual &&
+	git branch --no-merged=main main >actual &&
 	test_must_be_empty actual
 
 '
 
 test_expect_success 'implicit --list conflicts with modification options' '
 
-	test_must_fail git branch --contains=master -d &&
-	test_must_fail git branch --contains=master -m foo &&
-	test_must_fail git branch --no-contains=master -d &&
-	test_must_fail git branch --no-contains=master -m foo
+	test_must_fail git branch --contains=main -d &&
+	test_must_fail git branch --contains=main -m foo &&
+	test_must_fail git branch --no-contains=main -d &&
+	test_must_fail git branch --no-contains=main -m foo
 
 '
 
 test_expect_success 'Assert that --contains only works on commits, not trees & blobs' '
-	test_must_fail git branch --contains master^{tree} &&
+	test_must_fail git branch --contains main^{tree} &&
 	blob=$(git hash-object -w --stdin <<-\EOF
 	Some blob
 	EOF
@@ -172,11 +173,11 @@ test_expect_success 'Assert that --contains only works on commits, not trees & b
 '
 
 test_expect_success 'multiple branch --contains' '
-	git checkout -b side2 master &&
+	git checkout -b side2 main &&
 	>feature &&
 	git add feature &&
 	git commit -m "add feature" &&
-	git checkout -b next master &&
+	git checkout -b next main &&
 	git merge side &&
 	git branch --contains side --contains side2 >actual &&
 	cat >expect <<-\EOF &&
@@ -188,9 +189,9 @@ test_expect_success 'multiple branch --contains' '
 '
 
 test_expect_success 'multiple branch --merged' '
-	git branch --merged next --merged master >actual &&
+	git branch --merged next --merged main >actual &&
 	cat >expect <<-\EOF &&
-	  master
+	  main
 	* next
 	  side
 	EOF
@@ -200,13 +201,13 @@ test_expect_success 'multiple branch --merged' '
 test_expect_success 'multiple branch --no-contains' '
 	git branch --no-contains side --no-contains side2 >actual &&
 	cat >expect <<-\EOF &&
-	  master
+	  main
 	EOF
 	test_cmp expect actual
 '
 
 test_expect_success 'multiple branch --no-merged' '
-	git branch --no-merged next --no-merged master >actual &&
+	git branch --no-merged next --no-merged main >actual &&
 	cat >expect <<-\EOF &&
 	  side2
 	EOF
@@ -214,7 +215,7 @@ test_expect_success 'multiple branch --no-merged' '
 '
 
 test_expect_success 'branch --contains combined with --no-contains' '
-	git checkout -b seen master &&
+	git checkout -b seen main &&
 	git merge side &&
 	git merge side2 &&
 	git branch --contains side --no-contains side2 >actual &&
@@ -239,17 +240,17 @@ test_expect_success 'branch --merged combined with --no-merged' '
 # that the latter walk does not mess up our flag to see if it was
 # merged).
 #
-# Here "topic" tracks "master" with one extra commit, and "zzz" points to the
-# same tip as master The name "zzz" must come alphabetically after "topic"
+# Here "topic" tracks "main" with one extra commit, and "zzz" points to the
+# same tip as main The name "zzz" must come alphabetically after "topic"
 # as we process them in that order.
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'branch --merged with --verbose' '
-	git branch --track topic master &&
+test_expect_success 'branch --merged with --verbose' '
+	git branch --track topic main &&
 	git branch zzz topic &&
 	git checkout topic &&
 	test_commit foo &&
 	git branch --merged topic >actual &&
 	cat >expect <<-\EOF &&
-	  master
+	  main
 	* topic
 	  zzz
 	EOF
diff --git a/t/t3203-branch-output.sh b/t/t3203-branch-output.sh
index d65586541d..b945faf470 100755
--- a/t/t3203-branch-output.sh
+++ b/t/t3203-branch-output.sh
@@ -8,6 +8,7 @@ test_expect_success 'make commits' '
 	echo content >file &&
 	git add file &&
 	git commit -m one &&
+	git branch -M main &&
 	echo content >>file &&
 	git commit -a -m two
 '
@@ -26,7 +27,7 @@ test_expect_success 'make remote branches' '
 cat >expect <<'EOF'
   branch-one
   branch-two
-* master
+* main
 EOF
 test_expect_success 'git branch shows local branches' '
 	git branch >actual &&
@@ -60,7 +61,7 @@ test_expect_success 'git branch -r shows remote branches' '
 cat >expect <<'EOF'
   branch-one
   branch-two
-* master
+* main
   remotes/origin/HEAD -> origin/branch-one
   remotes/origin/branch-one
   remotes/origin/branch-two
@@ -152,7 +153,7 @@ test_expect_success 'git branch shows detached HEAD properly' '
 * (HEAD detached at $(git rev-parse --short HEAD^0))
   branch-one
   branch-two
-  master
+  main
 EOF
 	git checkout HEAD^0 &&
 	git branch >actual &&
@@ -160,12 +161,12 @@ EOF
 '
 
 test_expect_success 'git branch shows detached HEAD properly after checkout --detach' '
-	git checkout master &&
+	git checkout main &&
 	cat >expect <<EOF &&
 * (HEAD detached at $(git rev-parse --short HEAD^0))
   branch-one
   branch-two
-  master
+  main
 EOF
 	git checkout --detach &&
 	git branch >actual &&
@@ -177,7 +178,7 @@ test_expect_success 'git branch shows detached HEAD properly after moving' '
 * (HEAD detached from $(git rev-parse --short HEAD))
   branch-one
   branch-two
-  master
+  main
 EOF
 	git reset --hard HEAD^1 &&
 	git branch >actual &&
@@ -189,9 +190,9 @@ test_expect_success 'git branch shows detached HEAD properly from tag' '
 * (HEAD detached at fromtag)
   branch-one
   branch-two
-  master
+  main
 EOF
-	git tag fromtag master &&
+	git tag fromtag main &&
 	git checkout fromtag &&
 	git branch >actual &&
 	test_i18ncmp expect actual
@@ -202,7 +203,7 @@ test_expect_success 'git branch shows detached HEAD properly after moving from t
 * (HEAD detached from fromtag)
   branch-one
   branch-two
-  master
+  main
 EOF
 	git reset --hard HEAD^1 &&
 	git branch >actual &&
@@ -214,7 +215,7 @@ test_expect_success 'git branch `--sort` option' '
 	* (HEAD detached from fromtag)
 	  branch-two
 	  branch-one
-	  master
+	  main
 	EOF
 	git branch --sort=objectsize >actual &&
 	test_i18ncmp expect actual
@@ -223,7 +224,7 @@ test_expect_success 'git branch `--sort` option' '
 test_expect_success 'git branch --points-at option' '
 	cat >expect <<-\EOF &&
 	  branch-one
-	  master
+	  main
 	EOF
 	git branch --points-at=branch-one >actual &&
 	test_cmp expect actual
@@ -251,7 +252,7 @@ test_expect_success 'local-branch symrefs shortened properly' '
 
 test_expect_success 'sort branches, ignore case' '
 	(
-		git init sort-icase &&
+		git init -b main sort-icase &&
 		cd sort-icase &&
 		test_commit initial &&
 		git branch branch-one &&
@@ -260,14 +261,14 @@ test_expect_success 'sort branches, ignore case' '
 		cat >expected <<-\EOF &&
 		BRANCH-two
 		branch-one
-		master
+		main
 		EOF
 		test_cmp expected actual &&
 		git branch --list -i | awk "{print \$NF}" >actual &&
 		cat >expected <<-\EOF &&
 		branch-one
 		BRANCH-two
-		master
+		main
 		EOF
 		test_cmp expected actual
 	)
@@ -279,7 +280,7 @@ test_expect_success 'git branch --format option' '
 	Refname is refs/heads/ambiguous
 	Refname is refs/heads/branch-one
 	Refname is refs/heads/branch-two
-	Refname is refs/heads/master
+	Refname is refs/heads/main
 	Refname is refs/heads/ref-to-branch
 	Refname is refs/heads/ref-to-remote
 	EOF
@@ -293,7 +294,7 @@ test_expect_success 'worktree colors correct' '
 	  ambiguous<RESET>
 	  branch-one<RESET>
 	+ <CYAN>branch-two<RESET>
-	  master<RESET>
+	  main<RESET>
 	  ref-to-branch<RESET> -> branch-one
 	  ref-to-remote<RESET> -> origin/branch-one
 	EOF
@@ -306,9 +307,9 @@ test_expect_success 'worktree colors correct' '
 '
 
 test_expect_success "set up color tests" '
-	echo "<RED>master<RESET>" >expect.color &&
-	echo "master" >expect.bare &&
-	color_args="--format=%(color:red)%(refname:short) --list master"
+	echo "<RED>main<RESET>" >expect.color &&
+	echo "main" >expect.bare &&
+	color_args="--format=%(color:red)%(refname:short) --list main"
 '
 
 test_expect_success '%(color) omitted without tty' '
@@ -329,9 +330,9 @@ test_expect_success '--color overrides auto-color' '
 	test_cmp expect.color actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'verbose output lists worktree path' '
+test_expect_success 'verbose output lists worktree path' '
 	one=$(git rev-parse --short HEAD) &&
-	two=$(git rev-parse --short master) &&
+	two=$(git rev-parse --short main) &&
 	cat >expect <<-EOF &&
 	* (HEAD detached from fromtag) $one one
 	  ambiguous                    $one one
diff --git a/t/t3205-branch-color.sh b/t/t3205-branch-color.sh
index 289625c464..da1c202fa7 100755
--- a/t/t3205-branch-color.sh
+++ b/t/t3205-branch-color.sh
@@ -5,7 +5,8 @@ test_description='basic branch output coloring'
 
 test_expect_success 'set up some sample branches' '
 	test_commit foo &&
-	git update-ref refs/remotes/origin/master HEAD &&
+	git branch -M main &&
+	git update-ref refs/remotes/origin/main HEAD &&
 	git update-ref refs/heads/other HEAD
 '
 
@@ -19,16 +20,16 @@ test_expect_success 'set up some color config' '
 
 test_expect_success 'regular output shows colors' '
 	cat >expect <<-\EOF &&
-	* <CYAN>master<RESET>
+	* <CYAN>main<RESET>
 	  <BLUE>other<RESET>
-	  <YELLOW>remotes/origin/master<RESET>
+	  <YELLOW>remotes/origin/main<RESET>
 	EOF
 	git branch --color -a >actual.raw &&
 	test_decode_color <actual.raw >actual &&
 	test_cmp expect actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'verbose output shows colors' '
+test_expect_success 'verbose output shows colors' '
 	oid=$(git rev-parse --short HEAD) &&
 	cat >expect <<-EOF &&
 	* <CYAN>main               <RESET> $oid foo
diff --git a/t/t5505-remote.sh b/t/t5505-remote.sh
index eaa6e90220..ecadf02d64 100755
--- a/t/t5505-remote.sh
+++ b/t/t5505-remote.sh
@@ -7,7 +7,7 @@ test_description='git remote porcelain-ish'
 setup_repository () {
 	mkdir "$1" && (
 	cd "$1" &&
-	git init &&
+	git init -b main &&
 	>file &&
 	git add file &&
 	test_tick &&
@@ -17,7 +17,7 @@ setup_repository () {
 	git add elif &&
 	test_tick &&
 	git commit -m "Second" &&
-	git checkout master
+	git checkout main
 	)
 }
 
@@ -60,8 +60,8 @@ test_expect_success C_LOCALE_OUTPUT 'remote information for the origin' '
 	(
 		cd test &&
 		tokens_match origin "$(git remote)" &&
-		check_remote_track origin master side &&
-		check_tracking_branch origin HEAD master side
+		check_remote_track origin main side &&
+		check_tracking_branch origin HEAD main side
 	)
 '
 
@@ -70,7 +70,7 @@ test_expect_success 'add another remote' '
 		cd test &&
 		git remote add -f second ../two &&
 		tokens_match "origin second" "$(git remote)" &&
-		check_tracking_branch second master side another &&
+		check_tracking_branch second main side another &&
 		git for-each-ref "--format=%(refname)" refs/remotes |
 		sed -e "/^refs\/remotes\/origin\//d" \
 		    -e "/^refs\/remotes\/second\//d" >actual &&
@@ -81,8 +81,8 @@ test_expect_success 'add another remote' '
 test_expect_success C_LOCALE_OUTPUT 'check remote-tracking' '
 	(
 		cd test &&
-		check_remote_track origin master side &&
-		check_remote_track second master side another
+		check_remote_track origin main side &&
+		check_remote_track second main side another
 	)
 '
 
@@ -99,7 +99,7 @@ test_expect_success 'remote forces tracking branches' '
 test_expect_success 'remove remote' '
 	(
 		cd test &&
-		git symbolic-ref refs/remotes/second/HEAD refs/remotes/second/master &&
+		git symbolic-ref refs/remotes/second/HEAD refs/remotes/second/main &&
 		git remote rm second
 	)
 '
@@ -108,7 +108,7 @@ test_expect_success C_LOCALE_OUTPUT 'remove remote' '
 	(
 		cd test &&
 		tokens_match origin "$(git remote)" &&
-		check_remote_track origin master side &&
+		check_remote_track origin main side &&
 		git for-each-ref "--format=%(refname)" refs/remotes |
 		sed -e "/^refs\/remotes\/origin\//d" >actual &&
 		test_must_be_empty actual
@@ -121,13 +121,13 @@ test_expect_success 'remove remote protects local branches' '
 		cat >expect1 <<-\EOF &&
 		Note: A branch outside the refs/remotes/ hierarchy was not removed;
 		to delete it, use:
-		  git branch -d master
+		  git branch -d main
 		EOF
 		cat >expect2 <<-\EOF &&
 		Note: Some branches outside the refs/remotes/ hierarchy were not removed;
 		to delete them, use:
 		  git branch -d foobranch
-		  git branch -d master
+		  git branch -d main
 		EOF
 		git tag footag &&
 		git config --add remote.oops.fetch "+refs/*:refs/*" &&
@@ -153,7 +153,7 @@ test_expect_success 'remove errors out early when deleting non-existent branch'
 
 test_expect_success 'remove remote with a branch without configured merge' '
 	test_when_finished "(
-		git -C test checkout master;
+		git -C test checkout main;
 		git -C test branch -D two;
 		git -C test config --remove-section remote.two;
 		git -C test config --remove-section branch.second;
@@ -163,9 +163,9 @@ test_expect_success 'remove remote with a branch without configured merge' '
 		cd test &&
 		git remote add two ../two &&
 		git fetch two &&
-		git checkout -b second two/master^0 &&
+		git checkout -b second two/main^0 &&
 		git config branch.second.remote two &&
-		git checkout master &&
+		git checkout main &&
 		git remote rm two
 	)
 '
@@ -211,7 +211,7 @@ cat >test/expect <<EOF
 * remote origin
   Fetch URL: $(pwd)/one
   Push  URL: $(pwd)/one
-  HEAD branch: master
+  HEAD branch: main
   Remote branches:
     main new (next fetch will store in remotes/origin)
     side tracked
@@ -221,32 +221,32 @@ cat >test/expect <<EOF
     octopus  merges with remote topic-a
                 and with remote topic-b
                 and with remote topic-c
-    rebase  rebases onto remote master
+    rebase  rebases onto remote main
   Local refs configured for 'git push':
     main pushes to main     (local out of date)
     main pushes to upstream (create)
 * remote two
   Fetch URL: ../two
   Push  URL: ../three
-  HEAD branch: master
+  HEAD branch: main
   Local refs configured for 'git push':
     ahead forces to main    (fast-forwardable)
     main  pushes to another (up to date)
 EOF
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'show' '
+test_expect_success 'show' '
 	(
 		cd test &&
-		git config --add remote.origin.fetch refs/heads/master:refs/heads/upstream &&
+		git config --add remote.origin.fetch refs/heads/main:refs/heads/upstream &&
 		git fetch &&
-		git checkout -b ahead origin/master &&
+		git checkout -b ahead origin/main &&
 		echo 1 >>file &&
 		test_tick &&
 		git commit -m update file &&
-		git checkout master &&
-		git branch --track octopus origin/master &&
-		git branch --track rebase origin/master &&
-		git branch -d -r origin/master &&
+		git checkout main &&
+		git branch --track octopus origin/main &&
+		git branch --track rebase origin/main &&
+		git branch -d -r origin/main &&
 		git config --add remote.two.url ../two &&
 		git config --add remote.two.pushurl ../three &&
 		git config branch.rebase.rebase true &&
@@ -258,10 +258,10 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH 'show' '
 			git commit -m update file
 		) &&
 		git config --add remote.origin.push : &&
-		git config --add remote.origin.push refs/heads/master:refs/heads/upstream &&
+		git config --add remote.origin.push refs/heads/main:refs/heads/upstream &&
 		git config --add remote.origin.push +refs/tags/lastbackup &&
-		git config --add remote.two.push +refs/heads/ahead:refs/heads/master &&
-		git config --add remote.two.push refs/heads/master:refs/heads/another &&
+		git config --add remote.two.push +refs/heads/ahead:refs/heads/main &&
+		git config --add remote.two.push refs/heads/main:refs/heads/another &&
 		git remote show origin two >output &&
 		git branch -d rebase octopus &&
 		test_i18ncmp expect output
@@ -274,7 +274,7 @@ cat >test/expect <<EOF
   Push  URL: $(pwd)/one
   HEAD branch: (not queried)
   Remote branches: (status not queried)
-    master
+    main
     side
   Local branches configured for 'git pull':
     ahead merges with remote main
@@ -285,7 +285,7 @@ cat >test/expect <<EOF
     refs/tags/lastbackup forces to refs/tags/lastbackup
 EOF
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'show -n' '
+test_expect_success 'show -n' '
 	mv one one.unreachable &&
 	(
 		cd test &&
@@ -322,18 +322,18 @@ test_expect_success 'set-head --auto' '
 	(
 		cd test &&
 		git remote set-head --auto origin &&
-		echo refs/remotes/origin/master >expect &&
+		echo refs/remotes/origin/main >expect &&
 		git symbolic-ref refs/remotes/origin/HEAD >output &&
 		test_cmp expect output
 	)
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'set-head --auto has no problem w/multiple HEADs' '
+test_expect_success 'set-head --auto has no problem w/multiple HEADs' '
 	(
 		cd test &&
 		git fetch two "refs/heads/*:refs/remotes/two/*" &&
 		git remote set-head --auto two >output 2>&1 &&
-		echo "two/HEAD set to master" >expect &&
+		echo "two/HEAD set to main" >expect &&
 		test_i18ncmp expect output
 	)
 '
@@ -347,7 +347,7 @@ test_expect_success 'set-head explicit' '
 		cd test &&
 		git remote set-head origin side2 &&
 		git symbolic-ref refs/remotes/origin/HEAD >output &&
-		git remote set-head origin master &&
+		git remote set-head origin main &&
 		test_cmp expect output
 	)
 '
@@ -394,7 +394,7 @@ test_expect_success 'add --mirror && prune' '
 
 test_expect_success 'add --mirror=fetch' '
 	mkdir mirror-fetch &&
-	git init mirror-fetch/parent &&
+	git init -b main mirror-fetch/parent &&
 	(
 		cd mirror-fetch/parent &&
 		test_commit one
@@ -410,7 +410,7 @@ test_expect_success 'fetch mirrors act as mirrors during fetch' '
 	(
 		cd mirror-fetch/parent &&
 		git branch new &&
-		git branch -m master renamed
+		git branch -m main renamed
 	) &&
 	(
 		cd mirror-fetch/child &&
@@ -424,7 +424,7 @@ test_expect_success 'fetch mirrors can prune' '
 	(
 		cd mirror-fetch/child &&
 		git remote prune parent &&
-		test_must_fail git rev-parse --verify refs/heads/master
+		test_must_fail git rev-parse --verify refs/heads/main
 	)
 '
 
@@ -465,7 +465,7 @@ test_expect_success 'fetch mirror respects specific branches' '
 test_expect_success 'add --mirror=push' '
 	mkdir mirror-push &&
 	git init --bare mirror-push/public &&
-	git init mirror-push/private &&
+	git init -b main mirror-push/private &&
 	(
 		cd mirror-push/private &&
 		test_commit one &&
@@ -477,14 +477,14 @@ test_expect_success 'push mirrors act as mirrors during push' '
 	(
 		cd mirror-push/private &&
 		git branch new &&
-		git branch -m master renamed &&
+		git branch -m main renamed &&
 		git push public
 	) &&
 	(
 		cd mirror-push/private &&
 		git rev-parse --verify refs/heads/new &&
 		git rev-parse --verify refs/heads/renamed &&
-		test_must_fail git rev-parse --verify refs/heads/master
+		test_must_fail git rev-parse --verify refs/heads/main
 	)
 '
 
@@ -610,10 +610,10 @@ test_expect_success 'reject --no-no-tags' '
 '
 
 cat >one/expect <<\EOF
-  apis/master
+  apis/main
   apis/side
   drosophila/another
-  drosophila/master
+  drosophila/main
   drosophila/side
 EOF
 
@@ -630,11 +630,11 @@ test_expect_success 'update' '
 
 cat >one/expect <<\EOF
   drosophila/another
-  drosophila/master
+  drosophila/main
   drosophila/side
-  manduca/master
+  manduca/main
   manduca/side
-  megaloprepus/master
+  megaloprepus/main
   megaloprepus/side
 EOF
 
@@ -673,11 +673,11 @@ test_expect_success 'update --prune' '
 '
 
 cat >one/expect <<-\EOF
-  apis/master
+  apis/main
   apis/side
-  manduca/master
+  manduca/main
   manduca/side
-  megaloprepus/master
+  megaloprepus/main
   megaloprepus/side
 EOF
 
@@ -697,7 +697,7 @@ test_expect_success 'update default' '
 
 cat >one/expect <<\EOF
   drosophila/another
-  drosophila/master
+  drosophila/main
   drosophila/side
 EOF
 
@@ -751,14 +751,14 @@ test_expect_success 'rename a remote' '
 	git clone one four &&
 	(
 		cd four &&
-		git config branch.master.pushRemote origin &&
+		git config branch.main.pushRemote origin &&
 		git remote rename origin upstream &&
 		test -z "$(git for-each-ref refs/remotes/origin)" &&
-		test "$(git symbolic-ref refs/remotes/upstream/HEAD)" = "refs/remotes/upstream/master" &&
-		test "$(git rev-parse upstream/master)" = "$(git rev-parse master)" &&
+		test "$(git symbolic-ref refs/remotes/upstream/HEAD)" = "refs/remotes/upstream/main" &&
+		test "$(git rev-parse upstream/main)" = "$(git rev-parse main)" &&
 		test "$(git config remote.upstream.fetch)" = "+refs/heads/*:refs/remotes/upstream/*" &&
-		test "$(git config branch.master.remote)" = "upstream" &&
-		test "$(git config branch.master.pushRemote)" = "upstream" &&
+		test "$(git config branch.main.remote)" = "upstream" &&
+		test "$(git config branch.main.pushRemote)" = "upstream" &&
 		test "$(git config --global remote.pushDefault)" = "origin"
 	)
 '
@@ -804,7 +804,7 @@ test_expect_success 'rename does not update a non-default fetch refspec' '
 		git config remote.origin.fetch +refs/heads/*:refs/heads/origin/* &&
 		git remote rename origin upstream &&
 		test "$(git config remote.upstream.fetch)" = "+refs/heads/*:refs/heads/origin/*" &&
-		git rev-parse -q origin/master
+		git rev-parse -q origin/main
 	)
 '
 
@@ -824,7 +824,7 @@ test_expect_success 'rename a remote with name prefix of other remote' '
 		cd four.three &&
 		git remote add o git://example.com/repo.git &&
 		git remote rename o upstream &&
-		test "$(git rev-parse origin/master)" = "$(git rev-parse master)"
+		test "$(git rev-parse origin/main)" = "$(git rev-parse main)"
 	)
 '
 
@@ -840,11 +840,11 @@ test_expect_success 'remove a remote' '
 	git clone one four.five &&
 	(
 		cd four.five &&
-		git config branch.master.pushRemote origin &&
+		git config branch.main.pushRemote origin &&
 		git remote remove origin &&
 		test -z "$(git for-each-ref refs/remotes/origin)" &&
-		test_must_fail git config branch.master.remote &&
-		test_must_fail git config branch.master.pushRemote &&
+		test_must_fail git config branch.main.remote &&
+		test_must_fail git config branch.main.pushRemote &&
 		test "$(git config --global remote.pushDefault)" = "origin"
 	)
 '
@@ -885,9 +885,9 @@ test_expect_success 'remove a remote removes repo remote.pushDefault but keeps g
 
 cat >remotes_origin <<EOF
 URL: $(pwd)/one
-Push: refs/heads/master:refs/heads/upstream
+Push: refs/heads/main:refs/heads/upstream
 Push: refs/heads/next:refs/heads/upstream2
-Pull: refs/heads/master:refs/heads/origin
+Pull: refs/heads/main:refs/heads/origin
 Pull: refs/heads/next:refs/heads/origin2
 EOF
 
@@ -903,11 +903,11 @@ test_expect_success 'migrate a remote from named file in $GIT_DIR/remotes' '
 		test_path_is_missing .git/remotes/origin &&
 		test "$(git config remote.origin.url)" = "$origin_url" &&
 		cat >push_expected <<-\EOF &&
-		refs/heads/master:refs/heads/upstream
+		refs/heads/main:refs/heads/upstream
 		refs/heads/next:refs/heads/upstream2
 		EOF
 		cat >fetch_expected <<-\EOF &&
-		refs/heads/master:refs/heads/origin
+		refs/heads/main:refs/heads/origin
 		refs/heads/next:refs/heads/origin2
 		EOF
 		git config --get-all remote.origin.push >push_actual &&
@@ -923,12 +923,12 @@ test_expect_success 'migrate a remote from named file in $GIT_DIR/branches' '
 	(
 		cd six &&
 		git remote rm origin &&
-		echo "$origin_url" >.git/branches/origin &&
+		echo "$origin_url#main" >.git/branches/origin &&
 		git remote rename origin origin &&
 		test_path_is_missing .git/branches/origin &&
 		test "$(git config remote.origin.url)" = "$origin_url" &&
-		test "$(git config remote.origin.fetch)" = "refs/heads/master:refs/heads/origin" &&
-		test "$(git config remote.origin.push)" = "HEAD:refs/heads/master"
+		test "$(git config remote.origin.fetch)" = "refs/heads/main:refs/heads/origin" &&
+		test "$(git config remote.origin.push)" = "HEAD:refs/heads/main"
 	)
 '
 
@@ -951,7 +951,7 @@ test_expect_success 'remote prune to cause a dangling symref' '
 	(
 		cd one &&
 		git checkout side2 &&
-		git branch -D master
+		git branch -D main
 	) &&
 	(
 		cd eight &&
@@ -994,22 +994,22 @@ test_expect_success 'remote set-branches' '
 	EOF
 	sort <<-\EOF >expect.replace &&
 	+refs/heads/maint:refs/remotes/scratch/maint
-	+refs/heads/master:refs/remotes/scratch/master
+	+refs/heads/main:refs/remotes/scratch/main
 	+refs/heads/next:refs/remotes/scratch/next
 	EOF
 	sort <<-\EOF >expect.add-two &&
 	+refs/heads/maint:refs/remotes/scratch/maint
-	+refs/heads/master:refs/remotes/scratch/master
+	+refs/heads/main:refs/remotes/scratch/main
 	+refs/heads/next:refs/remotes/scratch/next
 	+refs/heads/seen:refs/remotes/scratch/seen
 	+refs/heads/t/topic:refs/remotes/scratch/t/topic
 	EOF
 	sort <<-\EOF >expect.setup-ffonly &&
-	refs/heads/master:refs/remotes/scratch/master
+	refs/heads/main:refs/remotes/scratch/main
 	+refs/heads/next:refs/remotes/scratch/next
 	EOF
 	sort <<-\EOF >expect.respect-ffonly &&
-	refs/heads/master:refs/remotes/scratch/master
+	refs/heads/main:refs/remotes/scratch/main
 	+refs/heads/next:refs/remotes/scratch/next
 	+refs/heads/seen:refs/remotes/scratch/seen
 	EOF
@@ -1025,7 +1025,7 @@ test_expect_success 'remote set-branches' '
 		git config --get-all remote.scratch.fetch >config-result &&
 		sort <config-result >../actual.add &&
 
-		git remote set-branches scratch maint master next &&
+		git remote set-branches scratch maint main next &&
 		git config --get-all remote.scratch.fetch >config-result &&
 		sort <config-result >../actual.replace &&
 
@@ -1035,7 +1035,7 @@ test_expect_success 'remote set-branches' '
 
 		git config --unset-all remote.scratch.fetch &&
 		git config remote.scratch.fetch \
-			refs/heads/master:refs/remotes/scratch/master &&
+			refs/heads/main:refs/remotes/scratch/main &&
 		git config --add remote.scratch.fetch \
 			+refs/heads/next:refs/remotes/scratch/next &&
 		git config --get-all remote.scratch.fetch >config-result &&
@@ -1055,14 +1055,14 @@ test_expect_success 'remote set-branches' '
 
 test_expect_success 'remote set-branches with --mirror' '
 	echo "+refs/*:refs/*" >expect.initial &&
-	echo "+refs/heads/master:refs/heads/master" >expect.replace &&
+	echo "+refs/heads/main:refs/heads/main" >expect.replace &&
 	git clone --mirror .git/ setbranches-mirror &&
 	(
 		cd setbranches-mirror &&
 		git remote rename origin scratch &&
 		git config --get-all remote.scratch.fetch >../actual.initial &&
 
-		git remote set-branches scratch heads/master &&
+		git remote set-branches scratch heads/main &&
 		git config --get-all remote.scratch.fetch >../actual.replace
 	) &&
 	test_cmp expect.initial actual.initial &&
@@ -1308,7 +1308,7 @@ test_extra_arg () {
 test_extra_arg add nick url
 test_extra_arg rename origin newname
 test_extra_arg remove origin
-test_extra_arg set-head origin master
+test_extra_arg set-head origin main
 # set-branches takes any number of args
 test_extra_arg get-url origin newurl
 test_extra_arg set-url origin newurl oldurl
@@ -1325,7 +1325,7 @@ test_expect_success 'unqualified <dst> refspec DWIM and advice' '
 	test_when_finished "(cd test && git tag -d some-tag)" &&
 	(
 		cd test &&
-		git tag -a -m "Some tag" some-tag master &&
+		git tag -a -m "Some tag" some-tag main &&
 		exit_with=true &&
 		for type in commit tag tree blob
 		do
@@ -1348,10 +1348,10 @@ test_expect_success 'unqualified <dst> refspec DWIM and advice' '
 	)
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'refs/remotes/* <src> refspec and unqualified <dst> DWIM and advice' '
+test_expect_success 'refs/remotes/* <src> refspec and unqualified <dst> DWIM and advice' '
 	(
 		cd two &&
-		git tag -a -m "Some tag" my-tag master &&
+		git tag -a -m "Some tag" my-tag main &&
 		git update-ref refs/trees/my-head-tree HEAD^{tree} &&
 		git update-ref refs/blobs/my-file-blob HEAD:file
 	) &&
diff --git a/t/t5510-fetch.sh b/t/t5510-fetch.sh
index 5d673358f9..2013051a64 100755
--- a/t/t5510-fetch.sh
+++ b/t/t5510-fetch.sh
@@ -25,7 +25,9 @@ convert_bundle_to_pack () {
 test_expect_success setup '
 	echo >file original &&
 	git add file &&
-	git commit -a -m original'
+	git commit -a -m original &&
+	git branch -M main
+'
 
 test_expect_success "clone and setup child repos" '
 	git clone . one &&
@@ -37,19 +39,19 @@ test_expect_success "clone and setup child repos" '
 	git clone . two &&
 	(
 		cd two &&
-		git config branch.master.remote one &&
+		git config branch.main.remote one &&
 		git config remote.one.url ../one/.git/ &&
-		git config remote.one.fetch refs/heads/master:refs/heads/one
+		git config remote.one.fetch refs/heads/main:refs/heads/one
 	) &&
 	git clone . three &&
 	(
 		cd three &&
-		git config branch.master.remote two &&
-		git config branch.master.merge refs/heads/one &&
+		git config branch.main.remote two &&
+		git config branch.main.merge refs/heads/one &&
 		mkdir -p .git/remotes &&
 		{
 			echo "URL: ../two/.git/"
-			echo "Pull: refs/heads/master:refs/heads/two"
+			echo "Pull: refs/heads/main:refs/heads/two"
 			echo "Pull: refs/heads/one:refs/heads/one"
 		} >.git/remotes/two
 	) &&
@@ -65,7 +67,7 @@ test_expect_success "fetch test" '
 	git fetch &&
 	git rev-parse --verify refs/heads/one &&
 	mine=$(git rev-parse refs/heads/one) &&
-	his=$(cd ../one && git rev-parse refs/heads/master) &&
+	his=$(cd ../one && git rev-parse refs/heads/main) &&
 	test "z$mine" = "z$his"
 '
 
@@ -75,11 +77,11 @@ test_expect_success "fetch test for-merge" '
 	git fetch &&
 	git rev-parse --verify refs/heads/two &&
 	git rev-parse --verify refs/heads/one &&
-	master_in_two=$(cd ../two && git rev-parse master) &&
+	main_in_two=$(cd ../two && git rev-parse main) &&
 	one_in_two=$(cd ../two && git rev-parse one) &&
 	{
 		echo "$one_in_two	"
-		echo "$master_in_two	not-for-merge"
+		echo "$main_in_two	not-for-merge"
 	} >expected &&
 	cut -f -2 .git/FETCH_HEAD >actual &&
 	test_cmp expected actual'
@@ -88,7 +90,7 @@ test_expect_success 'fetch --prune on its own works as expected' '
 	cd "$D" &&
 	git clone . prune &&
 	cd prune &&
-	git update-ref refs/remotes/origin/extrabranch master &&
+	git update-ref refs/remotes/origin/extrabranch main &&
 
 	git fetch --prune origin &&
 	test_must_fail git rev-parse origin/extrabranch
@@ -98,9 +100,9 @@ test_expect_success 'fetch --prune with a branch name keeps branches' '
 	cd "$D" &&
 	git clone . prune-branch &&
 	cd prune-branch &&
-	git update-ref refs/remotes/origin/extrabranch master &&
+	git update-ref refs/remotes/origin/extrabranch main &&
 
-	git fetch --prune origin master &&
+	git fetch --prune origin main &&
 	git rev-parse origin/extrabranch
 '
 
@@ -110,18 +112,18 @@ test_expect_success 'fetch --prune with a namespace keeps other namespaces' '
 	cd prune-namespace &&
 
 	git fetch --prune origin refs/heads/a/*:refs/remotes/origin/a/* &&
-	git rev-parse origin/master
+	git rev-parse origin/main
 '
 
 test_expect_success 'fetch --prune handles overlapping refspecs' '
 	cd "$D" &&
-	git update-ref refs/pull/42/head master &&
+	git update-ref refs/pull/42/head main &&
 	git clone . prune-overlapping &&
 	cd prune-overlapping &&
 	git config --add remote.origin.fetch refs/pull/*/head:refs/remotes/origin/pr/* &&
 
 	git fetch --prune origin &&
-	git rev-parse origin/master &&
+	git rev-parse origin/main &&
 	git rev-parse origin/pr/42 &&
 
 	git config --unset-all remote.origin.fetch &&
@@ -129,7 +131,7 @@ test_expect_success 'fetch --prune handles overlapping refspecs' '
 	git config --add remote.origin.fetch refs/heads/*:refs/remotes/origin/* &&
 
 	git fetch --prune origin &&
-	git rev-parse origin/master &&
+	git rev-parse origin/main &&
 	git rev-parse origin/pr/42
 '
 
@@ -137,13 +139,13 @@ test_expect_success 'fetch --prune --tags prunes branches but not tags' '
 	cd "$D" &&
 	git clone . prune-tags &&
 	cd prune-tags &&
-	git tag sometag master &&
+	git tag sometag main &&
 	# Create what looks like a remote-tracking branch from an earlier
 	# fetch that has since been deleted from the remote:
-	git update-ref refs/remotes/origin/fake-remote master &&
+	git update-ref refs/remotes/origin/fake-remote main &&
 
 	git fetch --prune --tags origin &&
-	git rev-parse origin/master &&
+	git rev-parse origin/main &&
 	test_must_fail git rev-parse origin/fake-remote &&
 	git rev-parse sometag
 '
@@ -152,10 +154,10 @@ test_expect_success 'fetch --prune --tags with branch does not prune other thing
 	cd "$D" &&
 	git clone . prune-tags-branch &&
 	cd prune-tags-branch &&
-	git tag sometag master &&
-	git update-ref refs/remotes/origin/extrabranch master &&
+	git tag sometag main &&
+	git update-ref refs/remotes/origin/extrabranch main &&
 
-	git fetch --prune --tags origin master &&
+	git fetch --prune --tags origin main &&
 	git rev-parse origin/extrabranch &&
 	git rev-parse sometag
 '
@@ -164,9 +166,9 @@ test_expect_success 'fetch --prune --tags with refspec prunes based on refspec'
 	cd "$D" &&
 	git clone . prune-tags-refspec &&
 	cd prune-tags-refspec &&
-	git tag sometag master &&
-	git update-ref refs/remotes/origin/foo/otherbranch master &&
-	git update-ref refs/remotes/origin/extrabranch master &&
+	git tag sometag main &&
+	git update-ref refs/remotes/origin/foo/otherbranch main &&
+	git update-ref refs/remotes/origin/extrabranch main &&
 
 	git fetch --prune --tags origin refs/heads/foo/*:refs/remotes/origin/foo/* &&
 	test_must_fail git rev-parse refs/remotes/origin/foo/otherbranch &&
@@ -177,20 +179,20 @@ test_expect_success 'fetch --prune --tags with refspec prunes based on refspec'
 test_expect_success '--refmap="" ignores configured refspec' '
 	cd "$TRASH_DIRECTORY" &&
 	git clone "$D" remote-refs &&
-	git -C remote-refs rev-parse remotes/origin/master >old &&
-	git -C remote-refs update-ref refs/remotes/origin/master master~1 &&
-	git -C remote-refs rev-parse remotes/origin/master >new &&
+	git -C remote-refs rev-parse remotes/origin/main >old &&
+	git -C remote-refs update-ref refs/remotes/origin/main main~1 &&
+	git -C remote-refs rev-parse remotes/origin/main >new &&
 	git -C remote-refs fetch --refmap= origin "+refs/heads/*:refs/hidden/origin/*" &&
-	git -C remote-refs rev-parse remotes/origin/master >actual &&
+	git -C remote-refs rev-parse remotes/origin/main >actual &&
 	test_cmp new actual &&
 	git -C remote-refs fetch origin &&
-	git -C remote-refs rev-parse remotes/origin/master >actual &&
+	git -C remote-refs rev-parse remotes/origin/main >actual &&
 	test_cmp old actual
 '
 
 test_expect_success '--refmap="" and --prune' '
-	git -C remote-refs update-ref refs/remotes/origin/foo/otherbranch master &&
-	git -C remote-refs update-ref refs/hidden/foo/otherbranch master &&
+	git -C remote-refs update-ref refs/remotes/origin/foo/otherbranch main &&
+	git -C remote-refs update-ref refs/hidden/foo/otherbranch main &&
 	git -C remote-refs fetch --prune --refmap="" origin +refs/heads/*:refs/hidden/* &&
 	git -C remote-refs rev-parse remotes/origin/foo/otherbranch &&
 	test_must_fail git -C remote-refs rev-parse refs/hidden/foo/otherbranch &&
@@ -250,7 +252,7 @@ test_expect_success 'fetch uses remote ref names to describe new refs' '
 		test_i18ngrep "new tag.* -> descriptive-tag$" actual &&
 		test_i18ngrep "new ref.* -> crazy$" actual
 	) &&
-	git checkout master
+	git checkout main
 '
 
 test_expect_success 'fetch must not resolve short tag name' '
@@ -281,7 +283,7 @@ test_expect_success 'create bundle 1' '
 	cd "$D" &&
 	echo >file updated again by origin &&
 	git commit -a -m "tip" &&
-	git bundle create --version=3 bundle1 master^..master
+	git bundle create --version=3 bundle1 main^..main
 '
 
 test_expect_success 'header of bundle looks right' '
@@ -289,7 +291,7 @@ test_expect_success 'header of bundle looks right' '
 	# v3 git bundle
 	@object-format=$(test_oid algo)
 	-OID updated by origin
-	OID refs/heads/master
+	OID refs/heads/main
 
 	EOF
 	sed -e "s/$OID_REGEX/OID/g" -e "5q" "$D"/bundle1 >actual &&
@@ -298,13 +300,13 @@ test_expect_success 'header of bundle looks right' '
 
 test_expect_success 'create bundle 2' '
 	cd "$D" &&
-	git bundle create bundle2 master~2..master
+	git bundle create bundle2 main~2..main
 '
 
 test_expect_success 'unbundle 1' '
 	cd "$D/bundle" &&
 	git checkout -b some-branch &&
-	test_must_fail git fetch "$D/bundle1" master:master
+	test_must_fail git fetch "$D/bundle1" main:main
 '
 
 
@@ -317,8 +319,8 @@ test_expect_success 'bundle 1 has only 3 files ' '
 
 test_expect_success 'unbundle 2' '
 	cd "$D/bundle" &&
-	git fetch ../bundle2 master:master &&
-	test "tip" = "$(git log -1 --pretty=oneline master | cut -d" " -f2)"
+	git fetch ../bundle2 main:main &&
+	test "tip" = "$(git log -1 --pretty=oneline main | cut -d" " -f2)"
 '
 
 test_expect_success 'bundle does not prerequisite objects' '
@@ -335,14 +337,14 @@ test_expect_success 'bundle does not prerequisite objects' '
 test_expect_success 'bundle should be able to create a full history' '
 
 	cd "$D" &&
-	git tag -a -m "1.0" v1.0 master &&
+	git tag -a -m "1.0" v1.0 main &&
 	git bundle create bundle4 v1.0
 
 '
 
 test_expect_success 'fetch with a non-applying branch.<name>.merge' '
-	git config branch.master.remote yeti &&
-	git config branch.master.merge refs/heads/bigfoot &&
+	git config branch.main.remote yeti &&
+	git config branch.main.merge refs/heads/bigfoot &&
 	git config remote.blub.url one &&
 	git config remote.blub.fetch "refs/heads/*:refs/remotes/one/*" &&
 	git fetch blub
@@ -362,8 +364,8 @@ test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge
 # the merge spec matches the branch the remote HEAD points to
 test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge [2]' '
 	one_ref=$(cd one && git symbolic-ref HEAD) &&
-	git config branch.master.remote blub &&
-	git config branch.master.merge "$one_ref" &&
+	git config branch.main.remote blub &&
+	git config branch.main.merge "$one_ref" &&
 	git update-ref -d FETCH_HEAD &&
 	git fetch one &&
 	test $one_head = "$(git rev-parse --verify FETCH_HEAD)" &&
@@ -373,7 +375,7 @@ test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge
 # URL supplied to fetch matches the url of the configured branch's remote, but
 # the merge spec does not match the branch the remote HEAD points to
 test_expect_success 'fetch from GIT URL with a non-applying branch.<name>.merge [3]' '
-	git config branch.master.merge "${one_ref}_not" &&
+	git config branch.main.merge "${one_ref}_not" &&
 	git update-ref -d FETCH_HEAD &&
 	git fetch one &&
 	test $one_head = "$(git rev-parse --verify FETCH_HEAD)" &&
@@ -389,9 +391,9 @@ test_expect_success 'quoting of a strangely named repo' '
 test_expect_success 'bundle should record HEAD correctly' '
 
 	cd "$D" &&
-	git bundle create bundle5 HEAD master &&
+	git bundle create bundle5 HEAD main &&
 	git bundle list-heads bundle5 >actual &&
-	for h in HEAD refs/heads/master
+	for h in HEAD refs/heads/main
 	do
 		echo "$(git rev-parse --verify $h) $h"
 	done >expect &&
@@ -399,10 +401,10 @@ test_expect_success 'bundle should record HEAD correctly' '
 
 '
 
-test_expect_success 'mark initial state of origin/master' '
+test_expect_success 'mark initial state of origin/main' '
 	(
 		cd three &&
-		git tag base-origin-master refs/remotes/origin/master
+		git tag base-origin-main refs/remotes/origin/main
 	)
 '
 
@@ -412,10 +414,10 @@ test_expect_success 'explicit fetch should update tracking' '
 	git branch -f side &&
 	(
 		cd three &&
-		git update-ref refs/remotes/origin/master base-origin-master &&
-		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git fetch origin master &&
-		n=$(git rev-parse --verify refs/remotes/origin/master) &&
+		git update-ref refs/remotes/origin/main base-origin-main &&
+		o=$(git rev-parse --verify refs/remotes/origin/main) &&
+		git fetch origin main &&
+		n=$(git rev-parse --verify refs/remotes/origin/main) &&
 		test "$o" != "$n" &&
 		test_must_fail git rev-parse --verify refs/remotes/origin/side
 	)
@@ -427,10 +429,10 @@ test_expect_success 'explicit pull should update tracking' '
 	git branch -f side &&
 	(
 		cd three &&
-		git update-ref refs/remotes/origin/master base-origin-master &&
-		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git pull origin master &&
-		n=$(git rev-parse --verify refs/remotes/origin/master) &&
+		git update-ref refs/remotes/origin/main base-origin-main &&
+		o=$(git rev-parse --verify refs/remotes/origin/main) &&
+		git pull origin main &&
+		n=$(git rev-parse --verify refs/remotes/origin/main) &&
 		test "$o" != "$n" &&
 		test_must_fail git rev-parse --verify refs/remotes/origin/side
 	)
@@ -449,13 +451,13 @@ test_expect_success 'explicit --refmap option overrides remote.*.fetch' '
 	git branch -f side &&
 	(
 		cd three &&
-		git update-ref refs/remotes/origin/master base-origin-master &&
-		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git fetch --refmap="refs/heads/*:refs/remotes/other/*" origin master &&
-		n=$(git rev-parse --verify refs/remotes/origin/master) &&
+		git update-ref refs/remotes/origin/main base-origin-main &&
+		o=$(git rev-parse --verify refs/remotes/origin/main) &&
+		git fetch --refmap="refs/heads/*:refs/remotes/other/*" origin main &&
+		n=$(git rev-parse --verify refs/remotes/origin/main) &&
 		test "$o" = "$n" &&
 		test_must_fail git rev-parse --verify refs/remotes/origin/side &&
-		git rev-parse --verify refs/remotes/other/master
+		git rev-parse --verify refs/remotes/other/main
 	)
 '
 
@@ -464,10 +466,10 @@ test_expect_success 'explicitly empty --refmap option disables remote.*.fetch' '
 	git branch -f side &&
 	(
 		cd three &&
-		git update-ref refs/remotes/origin/master base-origin-master &&
-		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git fetch --refmap="" origin master &&
-		n=$(git rev-parse --verify refs/remotes/origin/master) &&
+		git update-ref refs/remotes/origin/main base-origin-main &&
+		o=$(git rev-parse --verify refs/remotes/origin/main) &&
+		git fetch --refmap="" origin main &&
+		n=$(git rev-parse --verify refs/remotes/origin/main) &&
 		test "$o" = "$n" &&
 		test_must_fail git rev-parse --verify refs/remotes/origin/side
 	)
@@ -479,10 +481,10 @@ test_expect_success 'configured fetch updates tracking' '
 	git branch -f side &&
 	(
 		cd three &&
-		git update-ref refs/remotes/origin/master base-origin-master &&
-		o=$(git rev-parse --verify refs/remotes/origin/master) &&
+		git update-ref refs/remotes/origin/main base-origin-main &&
+		o=$(git rev-parse --verify refs/remotes/origin/main) &&
 		git fetch origin &&
-		n=$(git rev-parse --verify refs/remotes/origin/master) &&
+		n=$(git rev-parse --verify refs/remotes/origin/main) &&
 		test "$o" != "$n" &&
 		git rev-parse --verify refs/remotes/origin/side
 	)
@@ -493,12 +495,12 @@ test_expect_success 'non-matching refspecs do not confuse tracking update' '
 	git update-ref refs/odd/location HEAD &&
 	(
 		cd three &&
-		git update-ref refs/remotes/origin/master base-origin-master &&
+		git update-ref refs/remotes/origin/main base-origin-main &&
 		git config --add remote.origin.fetch \
 			refs/odd/location:refs/remotes/origin/odd &&
-		o=$(git rev-parse --verify refs/remotes/origin/master) &&
-		git fetch origin master &&
-		n=$(git rev-parse --verify refs/remotes/origin/master) &&
+		o=$(git rev-parse --verify refs/remotes/origin/main) &&
+		git fetch origin main &&
+		n=$(git rev-parse --verify refs/remotes/origin/main) &&
 		test "$o" != "$n" &&
 		test_must_fail git rev-parse --verify refs/remotes/origin/odd
 	)
@@ -524,7 +526,7 @@ test_expect_success 'auto tag following fetches minimum' '
 			git tag -a -m $i excess-$i || exit 1
 		done
 	) &&
-	git checkout master &&
+	git checkout main &&
 	(
 		cd follow &&
 		git fetch
@@ -533,13 +535,13 @@ test_expect_success 'auto tag following fetches minimum' '
 
 test_expect_success 'refuse to fetch into the current branch' '
 
-	test_must_fail git fetch . side:master
+	test_must_fail git fetch . side:main
 
 '
 
 test_expect_success 'fetch into the current branch with --update-head-ok' '
 
-	git fetch --update-head-ok . side:master
+	git fetch --update-head-ok . side:main
 
 '
 
@@ -568,7 +570,7 @@ test_expect_success "should be able to fetch with duplicate refspecs" '
 	(
 		cd dups &&
 		git init &&
-		git config branch.master.remote three &&
+		git config branch.main.remote three &&
 		git config remote.three.url ../three/.git &&
 		git config remote.three.fetch +refs/heads/*:refs/remotes/origin/* &&
 		git config --add remote.three.fetch +refs/heads/*:refs/remotes/origin/* &&
@@ -877,11 +879,11 @@ test_expect_success 'all boundary commits are excluded' '
 	test_commit oneside &&
 	git checkout HEAD^ &&
 	test_commit otherside &&
-	git checkout master &&
+	git checkout main &&
 	test_tick &&
 	git merge otherside &&
 	ad=$(git log --no-walk --format=%ad HEAD) &&
-	git bundle create twoside-boundary.bdl master --since="$ad" &&
+	git bundle create twoside-boundary.bdl main --since="$ad" &&
 	convert_bundle_to_pack <twoside-boundary.bdl >twoside-boundary.pack &&
 	pack=$(git index-pack --fix-thin --stdin <twoside-boundary.pack) &&
 	test_bundle_object_count .git/objects/pack/pack-${pack##pack	}.pack 3
@@ -942,7 +944,7 @@ test_expect_success 'fetching with auto-gc does not lock up' '
 	)
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH,C_LOCALE_OUTPUT 'fetch aligned output' '
+test_expect_success C_LOCALE_OUTPUT 'fetch aligned output' '
 	git clone . full-output &&
 	test_commit looooooooooooong-tag &&
 	(
@@ -957,7 +959,7 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH,C_LOCALE_OUTPUT 'fetch aligned outpu
 	test_cmp expect actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH,C_LOCALE_OUTPUT 'fetch compact output' '
+test_expect_success C_LOCALE_OUTPUT 'fetch compact output' '
 	git clone . compact &&
 	test_commit extraaa &&
 	(
@@ -1001,7 +1003,7 @@ setup_negotiation_tip () {
 	USE_PROTOCOL_V2="$3"
 
 	rm -rf "$SERVER" client trace &&
-	git init "$SERVER" &&
+	git init -b main "$SERVER" &&
 	test_commit -C "$SERVER" alpha_1 &&
 	test_commit -C "$SERVER" alpha_2 &&
 	git -C "$SERVER" checkout --orphan beta &&
@@ -1017,7 +1019,7 @@ setup_negotiation_tip () {
 	fi &&
 
 	test_commit -C "$SERVER" beta_s &&
-	git -C "$SERVER" checkout master &&
+	git -C "$SERVER" checkout main &&
 	test_commit -C "$SERVER" alpha_s &&
 	git -C "$SERVER" tag -d alpha_1 alpha_2 beta_1 beta_2
 }
diff --git a/t/t5703-upload-pack-ref-in-want.sh b/t/t5703-upload-pack-ref-in-want.sh
index b46940b725..eab966985b 100755
--- a/t/t5703-upload-pack-ref-in-want.sh
+++ b/t/t5703-upload-pack-ref-in-want.sh
@@ -38,12 +38,13 @@ write_command () {
 
 # c(o/foo) d(o/bar)
 #        \ /
-#         b   e(baz)  f(master)
+#         b   e(baz)  f(main)
 #          \__  |  __/
 #             \ | /
 #               a
 test_expect_success 'setup repository' '
 	test_commit a &&
+	git branch -M main &&
 	git checkout -b o/foo &&
 	test_commit b &&
 	test_commit c &&
@@ -51,7 +52,7 @@ test_expect_success 'setup repository' '
 	test_commit d &&
 	git checkout -b baz a &&
 	test_commit e &&
-	git checkout master &&
+	git checkout main &&
 	test_commit f
 '
 
@@ -88,7 +89,7 @@ test_expect_success 'invalid want-ref line' '
 test_expect_success 'basic want-ref' '
 	oid=$(git rev-parse f) &&
 	cat >expected_refs <<-EOF &&
-	$oid refs/heads/master
+	$oid refs/heads/main
 	EOF
 	git rev-parse f >expected_commits &&
 
@@ -97,7 +98,7 @@ test_expect_success 'basic want-ref' '
 	$(write_command fetch)
 	0001
 	no-progress
-	want-ref refs/heads/master
+	want-ref refs/heads/main
 	have $oid
 	done
 	0000
@@ -135,7 +136,7 @@ test_expect_success 'multiple want-ref lines' '
 test_expect_success 'mix want and want-ref' '
 	oid=$(git rev-parse f) &&
 	cat >expected_refs <<-EOF &&
-	$oid refs/heads/master
+	$oid refs/heads/main
 	EOF
 	git rev-parse e f >expected_commits &&
 
@@ -143,7 +144,7 @@ test_expect_success 'mix want and want-ref' '
 	$(write_command fetch)
 	0001
 	no-progress
-	want-ref refs/heads/master
+	want-ref refs/heads/main
 	want $(git rev-parse e)
 	have $(git rev-parse a)
 	done
@@ -182,7 +183,7 @@ LOCAL_PRISTINE="$(pwd)/local_pristine"
 # $REPO
 # c(o/foo) d(o/bar)
 #        \ /
-#         b   e(baz)  f(master)
+#         b   e(baz)  f(main)
 #          \__  |  __/
 #             \ | /
 #               a
@@ -193,10 +194,10 @@ LOCAL_PRISTINE="$(pwd)/local_pristine"
 #		.
 #		.
 #		|
-#		a(master)
+#		a(main)
 test_expect_success 'setup repos for fetching with ref-in-want tests' '
 	(
-		git init "$REPO" &&
+		git init -b main "$REPO" &&
 		cd "$REPO" &&
 		test_commit a &&
 
@@ -209,7 +210,7 @@ test_expect_success 'setup repos for fetching with ref-in-want tests' '
 		test_commit_bulk --id=s 33 &&
 
 		# Add novel commits to upstream
-		git checkout master &&
+		git checkout main &&
 		cd "$REPO" &&
 		git checkout -b o/foo &&
 		test_commit b &&
@@ -218,7 +219,7 @@ test_expect_success 'setup repos for fetching with ref-in-want tests' '
 		test_commit d &&
 		git checkout -b baz a &&
 		test_commit e &&
-		git checkout master &&
+		git checkout main &&
 		test_commit f
 	) &&
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
@@ -245,12 +246,12 @@ test_expect_success 'fetching multiple refs' '
 
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
-	GIT_TRACE_PACKET="$(pwd)/log" git -C local fetch origin master baz &&
+	GIT_TRACE_PACKET="$(pwd)/log" git -C local fetch origin main baz &&
 
-	git -C "$REPO" rev-parse "master" "baz" >expected &&
-	git -C local rev-parse refs/remotes/origin/master refs/remotes/origin/baz >actual &&
+	git -C "$REPO" rev-parse "main" "baz" >expected &&
+	git -C local rev-parse refs/remotes/origin/main refs/remotes/origin/baz >actual &&
 	test_cmp expected actual &&
-	grep "want-ref refs/heads/master" log &&
+	grep "want-ref refs/heads/main" log &&
 	grep "want-ref refs/heads/baz" log
 '
 
@@ -261,13 +262,13 @@ test_expect_success 'fetching ref and exact OID' '
 	cp -r "$LOCAL_PRISTINE" local &&
 	oid=$(git -C "$REPO" rev-parse b) &&
 	GIT_TRACE_PACKET="$(pwd)/log" git -C local fetch origin \
-		master "$oid":refs/heads/actual &&
+		main "$oid":refs/heads/actual &&
 
-	git -C "$REPO" rev-parse "master" "b" >expected &&
-	git -C local rev-parse refs/remotes/origin/master refs/heads/actual >actual &&
+	git -C "$REPO" rev-parse "main" "b" >expected &&
+	git -C local rev-parse refs/remotes/origin/main refs/heads/actual >actual &&
 	test_cmp expected actual &&
 	grep "want $oid" log &&
-	grep "want-ref refs/heads/master" log
+	grep "want-ref refs/heads/main" log
 '
 
 test_expect_success 'fetching with wildcard that does not match any refs' '
@@ -301,7 +302,7 @@ LOCAL_PRISTINE="$(pwd)/local_pristine"
 
 test_expect_success 'setup repos for change-while-negotiating test' '
 	(
-		git init "$REPO" &&
+		git init -b main "$REPO" &&
 		cd "$REPO" &&
 		>.git/git-daemon-export-ok &&
 		test_commit m1 &&
@@ -316,7 +317,7 @@ test_expect_success 'setup repos for change-while-negotiating test' '
 		test_commit_bulk --id=s 33 &&
 
 		# Add novel commits to upstream
-		git checkout master &&
+		git checkout main &&
 		cd "$REPO" &&
 		test_commit m2 &&
 		test_commit m3 &&
@@ -342,7 +343,7 @@ test_expect_success 'server is initially ahead - no ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant false &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
-	inconsistency master $(test_oid numeric) &&
+	inconsistency main $(test_oid numeric) &&
 	test_must_fail git -C local fetch 2>err &&
 	test_i18ngrep "fatal: remote error: upload-pack: not our ref" err
 '
@@ -351,11 +352,11 @@ test_expect_success 'server is initially ahead - ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
-	inconsistency master $(test_oid numeric) &&
+	inconsistency main $(test_oid numeric) &&
 	git -C local fetch &&
 
-	git -C "$REPO" rev-parse --verify master >expected &&
-	git -C local rev-parse --verify refs/remotes/origin/master >actual &&
+	git -C "$REPO" rev-parse --verify main >expected &&
+	git -C local rev-parse --verify refs/remotes/origin/main >actual &&
 	test_cmp expected actual
 '
 
@@ -363,11 +364,11 @@ test_expect_success 'server is initially behind - no ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant false &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
-	inconsistency master "master^" &&
+	inconsistency main "main^" &&
 	git -C local fetch &&
 
-	git -C "$REPO" rev-parse --verify "master^" >expected &&
-	git -C local rev-parse --verify refs/remotes/origin/master >actual &&
+	git -C "$REPO" rev-parse --verify "main^" >expected &&
+	git -C local rev-parse --verify refs/remotes/origin/main >actual &&
 	test_cmp expected actual
 '
 
@@ -375,15 +376,15 @@ test_expect_success 'server is initially behind - ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
-	inconsistency master "master^" &&
+	inconsistency main "main^" &&
 	git -C local fetch &&
 
-	git -C "$REPO" rev-parse --verify "master" >expected &&
-	git -C local rev-parse --verify refs/remotes/origin/master >actual &&
+	git -C "$REPO" rev-parse --verify "main" >expected &&
+	git -C local rev-parse --verify refs/remotes/origin/main >actual &&
 	test_cmp expected actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'server loses a ref - ref in want' '
+test_expect_success 'server loses a ref - ref in want' '
 	git -C "$REPO" config uploadpack.allowRefInWant true &&
 	rm -rf local &&
 	cp -r "$LOCAL_PRISTINE" local &&
diff --git a/t/t6302-for-each-ref-filter.sh b/t/t6302-for-each-ref-filter.sh
index 0a21669f56..9b8c8b2842 100755
--- a/t/t6302-for-each-ref-filter.sh
+++ b/t/t6302-for-each-ref-filter.sh
@@ -7,6 +7,7 @@ test_description='test for-each-refs usage of ref-filter APIs'
 
 test_expect_success 'setup some history and refs' '
 	test_commit one &&
+	git branch -M main &&
 	test_commit two &&
 	test_commit three &&
 	git checkout -b side &&
@@ -26,17 +27,17 @@ test_expect_success 'setup some history and refs' '
 	git tag $sign -m "A signed tag" signed-tag &&
 	git tag $sign -m "Signed doubly" doubly-signed-tag signed-tag &&
 
-	git checkout master &&
-	git update-ref refs/odd/spot master
+	git checkout main &&
+	git update-ref refs/odd/spot main
 '
 
 test_expect_success 'filtering with --points-at' '
 	cat >expect <<-\EOF &&
-	refs/heads/master
+	refs/heads/main
 	refs/odd/spot
 	refs/tags/three
 	EOF
-	git for-each-ref --format="%(refname)" --points-at=master >actual &&
+	git for-each-ref --format="%(refname)" --points-at=main >actual &&
 	test_cmp expect actual
 '
 
@@ -53,13 +54,13 @@ test_expect_success 'check signed tags with --points-at' '
 
 test_expect_success 'filtering with --merged' '
 	cat >expect <<-\EOF &&
-	refs/heads/master
+	refs/heads/main
 	refs/odd/spot
 	refs/tags/one
 	refs/tags/three
 	refs/tags/two
 	EOF
-	git for-each-ref --format="%(refname)" --merged=master >actual &&
+	git for-each-ref --format="%(refname)" --merged=main >actual &&
 	test_cmp expect actual
 '
 
@@ -72,13 +73,13 @@ test_expect_success 'filtering with --no-merged' '
 	refs/tags/four
 	refs/tags/signed-tag
 	EOF
-	git for-each-ref --format="%(refname)" --no-merged=master >actual &&
+	git for-each-ref --format="%(refname)" --no-merged=main >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'filtering with --contains' '
 	cat >expect <<-\EOF &&
-	refs/heads/master
+	refs/heads/main
 	refs/heads/side
 	refs/odd/spot
 	refs/tags/annotated-tag
@@ -113,7 +114,7 @@ test_expect_success '%(color) must fail' '
 	test_must_fail git for-each-ref --format="%(color)%(refname)"
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'left alignment is default' '
+test_expect_success 'left alignment is default' '
 	cat >expect <<-\EOF &&
 	refname is refs/heads/main    |refs/heads/main
 	refname is refs/heads/side    |refs/heads/side
@@ -131,7 +132,7 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH 'left alignment is default' '
 	test_cmp expect actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'middle alignment' '
+test_expect_success 'middle alignment' '
 	cat >expect <<-\EOF &&
 	|  refname is refs/heads/main  |refs/heads/main
 	|  refname is refs/heads/side  |refs/heads/side
@@ -149,7 +150,7 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH 'middle alignment' '
 	test_cmp expect actual
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'right alignment' '
+test_expect_success 'right alignment' '
 	cat >expect <<-\EOF &&
 	|    refname is refs/heads/main|refs/heads/main
 	|    refname is refs/heads/side|refs/heads/side
@@ -184,7 +185,7 @@ EOF
 test_align_permutations() {
 	while read -r option
 	do
-		test_expect_success PREPARE_FOR_MAIN_BRANCH "align:$option" '
+		test_expect_success "align:$option" '
 			git for-each-ref --format="|%(align:$option)refname is %(refname)%(end)|%(refname)" >actual &&
 			test_cmp expect actual
 		'
@@ -213,7 +214,7 @@ EOF
 
 # Individual atoms inside %(align:...) and %(end) must not be quoted.
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'alignment with format quote' "
+test_expect_success 'alignment with format quote' "
 	cat >expect <<-\EOF &&
 	|'       '\''main| A U Thor'\''       '|
 	|'       '\''side| A U Thor'\''       '|
@@ -231,7 +232,7 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH 'alignment with format quote' "
 	test_cmp expect actual
 "
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'nested alignment with quote formatting' "
+test_expect_success 'nested alignment with quote formatting' "
 	cat >expect <<-\EOF &&
 	|'           main               '|
 	|'           side               '|
@@ -251,7 +252,7 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH 'nested alignment with quote formatt
 
 test_expect_success 'check `%(contents:lines=1)`' '
 	cat >expect <<-\EOF &&
-	master |three
+	main |three
 	side |four
 	odd/spot |three
 	annotated-tag |An annotated tag
@@ -269,7 +270,7 @@ test_expect_success 'check `%(contents:lines=1)`' '
 
 test_expect_success 'check `%(contents:lines=0)`' '
 	cat >expect <<-\EOF &&
-	master |
+	main |
 	side |
 	odd/spot |
 	annotated-tag |
@@ -287,7 +288,7 @@ test_expect_success 'check `%(contents:lines=0)`' '
 
 test_expect_success 'check `%(contents:lines=99999)`' '
 	cat >expect <<-\EOF &&
-	master |three
+	main |three
 	side |four
 	odd/spot |three
 	annotated-tag |An annotated tag
@@ -360,7 +361,7 @@ test_expect_success 'improper usage of %(if), %(then), %(else) and %(end) atoms'
 test_expect_success 'check %(if)...%(then)...%(end) atoms' '
 	git for-each-ref --format="%(refname)%(if)%(authorname)%(then) Author: %(authorname)%(end)" >actual &&
 	cat >expect <<-\EOF &&
-	refs/heads/master Author: A U Thor
+	refs/heads/main Author: A U Thor
 	refs/heads/side Author: A U Thor
 	refs/odd/spot Author: A U Thor
 	refs/tags/annotated-tag
@@ -381,7 +382,7 @@ test_expect_success 'check %(if)...%(then)...%(end) atoms' '
 test_expect_success 'check %(if)...%(then)...%(else)...%(end) atoms' '
 	git for-each-ref --format="%(if)%(authorname)%(then)%(authorname)%(else)No author%(end): %(refname)" >actual &&
 	cat >expect <<-\EOF &&
-	A U Thor: refs/heads/master
+	A U Thor: refs/heads/main
 	A U Thor: refs/heads/side
 	A U Thor: refs/odd/spot
 	No author: refs/tags/annotated-tag
@@ -401,7 +402,7 @@ test_expect_success 'check %(if)...%(then)...%(else)...%(end) atoms' '
 test_expect_success 'ignore spaces in %(if) atom usage' '
 	git for-each-ref --format="%(refname:short): %(if)%(HEAD)%(then)Head ref%(else)Not Head ref%(end)" >actual &&
 	cat >expect <<-\EOF &&
-	master: Head ref
+	main: Head ref
 	side: Not Head ref
 	odd/spot: Not Head ref
 	annotated-tag: Not Head ref
@@ -420,19 +421,19 @@ test_expect_success 'ignore spaces in %(if) atom usage' '
 '
 
 test_expect_success 'check %(if:equals=<string>)' '
-	git for-each-ref --format="%(if:equals=master)%(refname:short)%(then)Found master%(else)Not master%(end)" refs/heads/ >actual &&
+	git for-each-ref --format="%(if:equals=main)%(refname:short)%(then)Found main%(else)Not main%(end)" refs/heads/ >actual &&
 	cat >expect <<-\EOF &&
-	Found master
-	Not master
+	Found main
+	Not main
 	EOF
 	test_cmp expect actual
 '
 
 test_expect_success 'check %(if:notequals=<string>)' '
-	git for-each-ref --format="%(if:notequals=master)%(refname:short)%(then)Not master%(else)Found master%(end)" refs/heads/ >actual &&
+	git for-each-ref --format="%(if:notequals=main)%(refname:short)%(then)Not main%(else)Found main%(end)" refs/heads/ >actual &&
 	cat >expect <<-\EOF &&
-	Found master
-	Not master
+	Found main
+	Not main
 	EOF
 	test_cmp expect actual
 '
@@ -443,11 +444,11 @@ test_expect_success '--merged is compatible with --no-merged' '
 
 test_expect_success 'validate worktree atom' '
 	cat >expect <<-EOF &&
-	master: $(pwd)
-	master_worktree: $(pwd)/worktree_dir
+	main: $(pwd)
+	main_worktree: $(pwd)/worktree_dir
 	side: not checked out
 	EOF
-	git worktree add -b master_worktree worktree_dir master &&
+	git worktree add -b main_worktree worktree_dir main &&
 	git for-each-ref --format="%(refname:short): %(if)%(worktreepath)%(then)%(worktreepath)%(else)not checked out%(end)" refs/heads/ >actual &&
 	rm -r worktree_dir &&
 	git worktree prune &&
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 81a728c743..a1c4f1f6d4 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -136,7 +136,7 @@ fi
 test_expect_success 'setup for __git_find_repo_path/__gitdir tests' '
 	mkdir -p subdir/subsubdir &&
 	mkdir -p non-repo &&
-	git init otherrepo
+	git init -b main otherrepo
 '
 
 test_expect_success '__git_find_repo_path - from command line (through $__git_dir)' '
@@ -614,12 +614,13 @@ test_expect_success '__git_is_configured_remote' '
 
 test_expect_success 'setup for ref completion' '
 	git commit --allow-empty -m initial &&
+	git branch -M main &&
 	git branch matching-branch &&
 	git tag matching-tag &&
 	(
 		cd otherrepo &&
 		git commit --allow-empty -m initial &&
-		git branch -m master master-in-other &&
+		git branch -m main main-in-other &&
 		git branch branch-in-other &&
 		git tag tag-in-other
 	) &&
@@ -632,10 +633,10 @@ test_expect_success 'setup for ref completion' '
 test_expect_success '__git_refs - simple' '
 	cat >expected <<-EOF &&
 	HEAD
-	master
+	main
 	matching-branch
 	other/branch-in-other
-	other/master-in-other
+	other/main-in-other
 	matching-tag
 	EOF
 	(
@@ -647,10 +648,10 @@ test_expect_success '__git_refs - simple' '
 
 test_expect_success '__git_refs - full refs' '
 	cat >expected <<-EOF &&
-	refs/heads/master
+	refs/heads/main
 	refs/heads/matching-branch
 	refs/remotes/other/branch-in-other
-	refs/remotes/other/master-in-other
+	refs/remotes/other/main-in-other
 	refs/tags/matching-tag
 	EOF
 	(
@@ -664,7 +665,7 @@ test_expect_success '__git_refs - repo given on the command line' '
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
-	master-in-other
+	main-in-other
 	tag-in-other
 	EOF
 	(
@@ -679,7 +680,7 @@ test_expect_success '__git_refs - remote on local file system' '
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
-	master-in-other
+	main-in-other
 	tag-in-other
 	EOF
 	(
@@ -692,7 +693,7 @@ test_expect_success '__git_refs - remote on local file system' '
 test_expect_success '__git_refs - remote on local file system - full refs' '
 	cat >expected <<-EOF &&
 	refs/heads/branch-in-other
-	refs/heads/master-in-other
+	refs/heads/main-in-other
 	refs/tags/tag-in-other
 	EOF
 	(
@@ -706,7 +707,7 @@ test_expect_success '__git_refs - configured remote' '
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
-	master-in-other
+	main-in-other
 	EOF
 	(
 		cur= &&
@@ -719,7 +720,7 @@ test_expect_success '__git_refs - configured remote - full refs' '
 	cat >expected <<-EOF &&
 	HEAD
 	refs/heads/branch-in-other
-	refs/heads/master-in-other
+	refs/heads/main-in-other
 	refs/tags/tag-in-other
 	EOF
 	(
@@ -733,7 +734,7 @@ test_expect_success '__git_refs - configured remote - repo given on the command
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
-	master-in-other
+	main-in-other
 	EOF
 	(
 		cd thirdrepo &&
@@ -748,7 +749,7 @@ test_expect_success '__git_refs - configured remote - full refs - repo given on
 	cat >expected <<-EOF &&
 	HEAD
 	refs/heads/branch-in-other
-	refs/heads/master-in-other
+	refs/heads/main-in-other
 	refs/tags/tag-in-other
 	EOF
 	(
@@ -764,7 +765,7 @@ test_expect_success '__git_refs - configured remote - remote name matches a dire
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
-	master-in-other
+	main-in-other
 	EOF
 	mkdir other &&
 	test_when_finished "rm -rf other" &&
@@ -779,7 +780,7 @@ test_expect_success '__git_refs - URL remote' '
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
-	master-in-other
+	main-in-other
 	tag-in-other
 	EOF
 	(
@@ -793,7 +794,7 @@ test_expect_success '__git_refs - URL remote - full refs' '
 	cat >expected <<-EOF &&
 	HEAD
 	refs/heads/branch-in-other
-	refs/heads/master-in-other
+	refs/heads/main-in-other
 	refs/tags/tag-in-other
 	EOF
 	(
@@ -849,23 +850,23 @@ test_expect_success '__git_refs - not in a git repository' '
 test_expect_success '__git_refs - unique remote branches for git checkout DWIMery' '
 	cat >expected <<-EOF &&
 	HEAD
-	master
+	main
 	matching-branch
 	other/ambiguous
 	other/branch-in-other
-	other/master-in-other
+	other/main-in-other
 	remote/ambiguous
 	remote/branch-in-remote
 	matching-tag
 	branch-in-other
 	branch-in-remote
-	master-in-other
+	main-in-other
 	EOF
 	for remote_ref in refs/remotes/other/ambiguous \
 		refs/remotes/remote/ambiguous \
 		refs/remotes/remote/branch-in-remote
 	do
-		git update-ref $remote_ref master &&
+		git update-ref $remote_ref main &&
 		test_when_finished "git update-ref -d $remote_ref"
 	done &&
 	(
@@ -878,10 +879,10 @@ test_expect_success '__git_refs - unique remote branches for git checkout DWIMer
 test_expect_success '__git_refs - after --opt=' '
 	cat >expected <<-EOF &&
 	HEAD
-	master
+	main
 	matching-branch
 	other/branch-in-other
-	other/master-in-other
+	other/main-in-other
 	matching-tag
 	EOF
 	(
@@ -893,10 +894,10 @@ test_expect_success '__git_refs - after --opt=' '
 
 test_expect_success '__git_refs - after --opt= - full refs' '
 	cat >expected <<-EOF &&
-	refs/heads/master
+	refs/heads/main
 	refs/heads/matching-branch
 	refs/remotes/other/branch-in-other
-	refs/remotes/other/master-in-other
+	refs/remotes/other/main-in-other
 	refs/tags/matching-tag
 	EOF
 	(
@@ -909,10 +910,10 @@ test_expect_success '__git_refs - after --opt= - full refs' '
 test_expect_success '__git refs - excluding refs' '
 	cat >expected <<-EOF &&
 	^HEAD
-	^master
+	^main
 	^matching-branch
 	^other/branch-in-other
-	^other/master-in-other
+	^other/main-in-other
 	^matching-tag
 	EOF
 	(
@@ -924,10 +925,10 @@ test_expect_success '__git refs - excluding refs' '
 
 test_expect_success '__git refs - excluding full refs' '
 	cat >expected <<-EOF &&
-	^refs/heads/master
+	^refs/heads/main
 	^refs/heads/matching-branch
 	^refs/remotes/other/branch-in-other
-	^refs/remotes/other/master-in-other
+	^refs/remotes/other/main-in-other
 	^refs/tags/matching-tag
 	EOF
 	(
@@ -948,17 +949,17 @@ test_expect_success 'setup for filtering matching refs' '
 test_expect_success '__git_refs - do not filter refs unless told so' '
 	cat >expected <<-EOF &&
 	HEAD
-	master
+	main
 	matching-branch
 	matching/branch
 	other/branch-in-other
-	other/master-in-other
+	other/main-in-other
 	other/matching/branch-in-other
 	matching-tag
 	matching/tag
 	EOF
 	(
-		cur=master &&
+		cur=main &&
 		__git_refs >"$actual"
 	) &&
 	test_cmp expected "$actual"
@@ -992,7 +993,7 @@ test_expect_success '__git_refs - only matching refs - full refs' '
 
 test_expect_success '__git_refs - only matching refs - remote on local file system' '
 	cat >expected <<-EOF &&
-	master-in-other
+	main-in-other
 	matching/branch-in-other
 	EOF
 	(
@@ -1004,7 +1005,7 @@ test_expect_success '__git_refs - only matching refs - remote on local file syst
 
 test_expect_success '__git_refs - only matching refs - configured remote' '
 	cat >expected <<-EOF &&
-	master-in-other
+	main-in-other
 	matching/branch-in-other
 	EOF
 	(
@@ -1016,7 +1017,7 @@ test_expect_success '__git_refs - only matching refs - configured remote' '
 
 test_expect_success '__git_refs - only matching refs - remote - full refs' '
 	cat >expected <<-EOF &&
-	refs/heads/master-in-other
+	refs/heads/main-in-other
 	refs/heads/matching/branch-in-other
 	EOF
 	(
@@ -1038,7 +1039,7 @@ test_expect_success '__git_refs - only matching refs - checkout DWIMery' '
 		refs/remotes/remote/ambiguous \
 		refs/remotes/remote/branch-in-remote
 	do
-		git update-ref $remote_ref master &&
+		git update-ref $remote_ref main &&
 		test_when_finished "git update-ref -d $remote_ref"
 	done &&
 	(
@@ -1055,9 +1056,9 @@ test_expect_success 'teardown after filtering matching refs' '
 	git -C otherrepo branch -D matching/branch-in-other
 '
 
-test_expect_success PREPARE_FOR_MAIN_BRANCH '__git_refs - for-each-ref format specifiers in prefix' '
+test_expect_success '__git_refs - for-each-ref format specifiers in prefix' '
 	cat >expected <<-EOF &&
-	evil-%%-%42-%(refname)..master
+	evil-%%-%42-%(refname)..main
 	EOF
 	(
 		cur="evil-%%-%42-%(refname)..mai" &&
@@ -1069,10 +1070,10 @@ test_expect_success PREPARE_FOR_MAIN_BRANCH '__git_refs - for-each-ref format sp
 test_expect_success '__git_complete_refs - simple' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	matching-tag Z
 	EOF
 	(
@@ -1100,7 +1101,7 @@ test_expect_success '__git_complete_refs - remote' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	HEAD Z
 	branch-in-other Z
-	master-in-other Z
+	main-in-other Z
 	EOF
 	(
 		cur= &&
@@ -1113,13 +1114,13 @@ test_expect_success '__git_complete_refs - remote' '
 test_expect_success '__git_complete_refs - track' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	matching-tag Z
 	branch-in-other Z
-	master-in-other Z
+	main-in-other Z
 	EOF
 	(
 		cur= &&
@@ -1158,10 +1159,10 @@ test_expect_success '__git_complete_refs - prefix' '
 test_expect_success '__git_complete_refs - suffix' '
 	cat >expected <<-EOF &&
 	HEAD.
-	master.
+	main.
 	matching-branch.
 	other/branch-in-other.
-	other/master-in-other.
+	other/main-in-other.
 	matching-tag.
 	EOF
 	(
@@ -1176,7 +1177,7 @@ test_expect_success '__git_complete_fetch_refspecs - simple' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	HEAD:HEAD Z
 	branch-in-other:branch-in-other Z
-	master-in-other:master-in-other Z
+	main-in-other:main-in-other Z
 	EOF
 	(
 		cur= &&
@@ -1202,7 +1203,7 @@ test_expect_success '__git_complete_fetch_refspecs - prefix' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	+HEAD:HEAD Z
 	+branch-in-other:branch-in-other Z
-	+master-in-other:master-in-other Z
+	+main-in-other:main-in-other Z
 	EOF
 	(
 		cur="+" &&
@@ -1215,7 +1216,7 @@ test_expect_success '__git_complete_fetch_refspecs - prefix' '
 test_expect_success '__git_complete_fetch_refspecs - fully qualified' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	refs/heads/branch-in-other:refs/heads/branch-in-other Z
-	refs/heads/master-in-other:refs/heads/master-in-other Z
+	refs/heads/main-in-other:refs/heads/main-in-other Z
 	refs/tags/tag-in-other:refs/tags/tag-in-other Z
 	EOF
 	(
@@ -1229,7 +1230,7 @@ test_expect_success '__git_complete_fetch_refspecs - fully qualified' '
 test_expect_success '__git_complete_fetch_refspecs - fully qualified & prefix' '
 	sed -e "s/Z$//" >expected <<-EOF &&
 	+refs/heads/branch-in-other:refs/heads/branch-in-other Z
-	+refs/heads/master-in-other:refs/heads/master-in-other Z
+	+refs/heads/main-in-other:refs/heads/main-in-other Z
 	+refs/tags/tag-in-other:refs/tags/tag-in-other Z
 	EOF
 	(
@@ -1243,8 +1244,8 @@ test_expect_success '__git_complete_fetch_refspecs - fully qualified & prefix' '
 test_expect_success 'git switch - with no options, complete local branches and unique remote branch names for DWIM logic' '
 	test_completion "git switch " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
@@ -1253,25 +1254,25 @@ test_expect_success 'git checkout - completes refs and unique remote branches fo
 	test_completion "git checkout " <<-\EOF
 	HEAD Z
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with --no-guess, complete only local branches' '
 	test_completion "git switch --no-guess " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - with GIT_COMPLETION_CHECKOUT_NO_GUESS=1, complete only local branches' '
 	GIT_COMPLETION_CHECKOUT_NO_GUESS=1 test_completion "git switch " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
@@ -1279,8 +1280,8 @@ test_expect_success 'git switch - with GIT_COMPLETION_CHECKOUT_NO_GUESS=1, compl
 test_expect_success 'git switch - --guess overrides GIT_COMPLETION_CHECKOUT_NO_GUESS=1, complete local branches and unique remote names for DWIM logic' '
 	GIT_COMPLETION_CHECKOUT_NO_GUESS=1 test_completion "git switch --guess " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
@@ -1288,15 +1289,15 @@ test_expect_success 'git switch - --guess overrides GIT_COMPLETION_CHECKOUT_NO_G
 test_expect_success 'git switch - a later --guess overrides previous --no-guess, complete local and remote unique branches for DWIM' '
 	test_completion "git switch --no-guess --guess " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - a later --no-guess overrides previous --guess, complete only local branches' '
 	test_completion "git switch --guess --no-guess " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
@@ -1304,11 +1305,11 @@ test_expect_success 'git switch - a later --no-guess overrides previous --guess,
 test_expect_success 'git checkout - with GIT_COMPLETION_NO_GUESS=1 only completes refs' '
 	GIT_COMPLETION_CHECKOUT_NO_GUESS=1 test_completion "git checkout " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -1316,23 +1317,23 @@ test_expect_success 'git checkout - --guess overrides GIT_COMPLETION_NO_GUESS=1,
 	GIT_COMPLETION_CHECKOUT_NO_GUESS=1 test_completion "git checkout --guess " <<-\EOF
 	HEAD Z
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with --no-guess, only completes refs' '
 	test_completion "git checkout --no-guess " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -1340,23 +1341,23 @@ test_expect_success 'git checkout - a later --guess overrides previous --no-gues
 	test_completion "git checkout --no-guess --guess " <<-\EOF
 	HEAD Z
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - a later --no-guess overrides previous --guess, complete only refs' '
 	test_completion "git checkout --guess --no-guess " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -1364,11 +1365,11 @@ test_expect_success 'git checkout - with checkout.guess = false, only completes
 	test_config checkout.guess false &&
 	test_completion "git checkout " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -1377,12 +1378,12 @@ test_expect_success 'git checkout - with checkout.guess = true, completes refs a
 	test_completion "git checkout " <<-\EOF
 	HEAD Z
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -1391,12 +1392,12 @@ test_expect_success 'git checkout - a later --guess overrides previous checkout.
 	test_completion "git checkout --guess " <<-\EOF
 	HEAD Z
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -1404,75 +1405,75 @@ test_expect_success 'git checkout - a later --no-guess overrides previous checko
 	test_config checkout.guess true &&
 	test_completion "git checkout --no-guess " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with --detach, complete all references' '
 	test_completion "git switch --detach " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with --detach, complete only references' '
 	test_completion "git checkout --detach " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -d, complete all references' '
 	test_completion "git switch -d " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -d, complete only references' '
 	test_completion "git checkout -d " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with --track, complete only remote branches' '
 	test_completion "git switch --track " <<-\EOF
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with --track, complete only remote branches' '
 	test_completion "git checkout --track " <<-\EOF
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with --no-track, complete only local branch names' '
 	test_completion "git switch --no-track " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
@@ -1480,151 +1481,151 @@ test_expect_success 'git switch - with --no-track, complete only local branch na
 test_expect_success 'git checkout - with --no-track, complete only local references' '
 	test_completion "git checkout --no-track " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -c, complete all references' '
 	test_completion "git switch -c new-branch " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -C, complete all references' '
 	test_completion "git switch -C new-branch " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -c and --track, complete all references' '
 	test_completion "git switch -c new-branch --track " <<-EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -C and --track, complete all references' '
 	test_completion "git switch -C new-branch --track " <<-EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -c and --no-track, complete all references' '
 	test_completion "git switch -c new-branch --no-track " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - with -C and --no-track, complete all references' '
 	test_completion "git switch -C new-branch --no-track " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -b, complete all references' '
 	test_completion "git checkout -b new-branch " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -B, complete all references' '
 	test_completion "git checkout -B new-branch " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -b and --track, complete all references' '
 	test_completion "git checkout -b new-branch --track " <<-EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -B and --track, complete all references' '
 	test_completion "git checkout -B new-branch --track " <<-EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -b and --no-track, complete all references' '
 	test_completion "git checkout -b new-branch --no-track " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git checkout - with -B and --no-track, complete all references' '
 	test_completion "git checkout -B new-branch --no-track " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
 test_expect_success 'git switch - for -c, complete local branches and unique remote branches' '
 	test_completion "git switch -c " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
@@ -1632,36 +1633,36 @@ test_expect_success 'git switch - for -c, complete local branches and unique rem
 test_expect_success 'git switch - for -C, complete local branches and unique remote branches' '
 	test_completion "git switch -C " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - for -c with --no-guess, complete local branches only' '
 	test_completion "git switch --no-guess -c " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - for -C with --no-guess, complete local branches only' '
 	test_completion "git switch --no-guess -C " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - for -c with --no-track, complete local branches only' '
 	test_completion "git switch --no-track -c " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - for -C with --no-track, complete local branches only' '
 	test_completion "git switch --no-track -C " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
@@ -1669,8 +1670,8 @@ test_expect_success 'git switch - for -C with --no-track, complete local branche
 test_expect_success 'git checkout - for -b, complete local branches and unique remote branches' '
 	test_completion "git checkout -b " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
@@ -1678,36 +1679,36 @@ test_expect_success 'git checkout - for -b, complete local branches and unique r
 test_expect_success 'git checkout - for -B, complete local branches and unique remote branches' '
 	test_completion "git checkout -B " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git checkout - for -b with --no-guess, complete local branches only' '
 	test_completion "git checkout --no-guess -b " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git checkout - for -B with --no-guess, complete local branches only' '
 	test_completion "git checkout --no-guess -B " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git checkout - for -b with --no-track, complete local branches only' '
 	test_completion "git checkout --no-track -b " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git checkout - for -B with --no-track, complete local branches only' '
 	test_completion "git checkout --no-track -B " <<-\EOF
-	master Z
+	main Z
 	matching-branch Z
 	EOF
 '
@@ -1715,14 +1716,14 @@ test_expect_success 'git checkout - for -B with --no-track, complete local branc
 test_expect_success 'git switch - with --orphan completes local branch names and unique remote branch names' '
 	test_completion "git switch --orphan " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git switch - --orphan with branch already provided completes nothing else' '
-	test_completion "git switch --orphan master " <<-\EOF
+	test_completion "git switch --orphan main " <<-\EOF
 
 	EOF
 '
@@ -1730,20 +1731,20 @@ test_expect_success 'git switch - --orphan with branch already provided complete
 test_expect_success 'git checkout - with --orphan completes local branch names and unique remote branch names' '
 	test_completion "git checkout --orphan " <<-\EOF
 	branch-in-other Z
-	master Z
-	master-in-other Z
+	main Z
+	main-in-other Z
 	matching-branch Z
 	EOF
 '
 
 test_expect_success 'git checkout - --orphan with branch already provided completes local refs for a start-point' '
-	test_completion "git checkout --orphan master " <<-\EOF
+	test_completion "git checkout --orphan main " <<-\EOF
 	HEAD Z
-	master Z
+	main Z
 	matching-branch Z
 	matching-tag Z
 	other/branch-in-other Z
-	other/master-in-other Z
+	other/main-in-other Z
 	EOF
 '
 
@@ -2067,7 +2068,7 @@ test_expect_success 'setup for integration tests' '
 
 test_expect_success 'checkout completes ref names' '
 	test_completion "git checkout m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2081,7 +2082,7 @@ test_expect_success 'git -C <path> checkout uses the right repo' '
 
 test_expect_success 'show completes all refs' '
 	test_completion "git show m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2118,7 +2119,7 @@ test_expect_success PERL 'send-email' '
 	--cover-from-description=Z
 	--cover-letter Z
 	EOF
-	test_completion "git send-email ma" "master "
+	test_completion "git send-email ma" "main "
 '
 
 test_expect_success 'complete files' '
@@ -2198,7 +2199,7 @@ test_expect_success 'complete files' '
 test_expect_success "simple alias" '
 	test_config alias.co checkout &&
 	test_completion "git co m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2208,7 +2209,7 @@ test_expect_success "recursive alias" '
 	test_config alias.co checkout &&
 	test_config alias.cod "co --detached" &&
 	test_completion "git cod m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2217,7 +2218,7 @@ test_expect_success "recursive alias" '
 test_expect_success "completion uses <cmd> completion for alias: !sh -c 'git <cmd> ...'" '
 	test_config alias.co "!sh -c '"'"'git checkout ...'"'"'" &&
 	test_completion "git co m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2226,7 +2227,7 @@ test_expect_success "completion uses <cmd> completion for alias: !sh -c 'git <cm
 test_expect_success 'completion uses <cmd> completion for alias: !f () { VAR=val git <cmd> ... }' '
 	test_config alias.co "!f () { VAR=val git checkout ... ; } f" &&
 	test_completion "git co m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2235,7 +2236,7 @@ test_expect_success 'completion uses <cmd> completion for alias: !f () { VAR=val
 test_expect_success 'completion used <cmd> completion for alias: !f() { : git <cmd> ; ... }' '
 	test_config alias.co "!f() { : git checkout ; if ... } f" &&
 	test_completion "git co m" <<-\EOF
-	master Z
+	main Z
 	mybranch Z
 	mytag Z
 	EOF
@@ -2266,7 +2267,7 @@ for flag in -d --delete
 do
 	test_expect_success "__git_complete_remote_or_refspec - push $flag other" '
 		sed -e "s/Z$//" >expected <<-EOF &&
-		master-in-other Z
+		main-in-other Z
 		EOF
 		(
 			words=(git push '$flag' other ma) &&
@@ -2279,7 +2280,7 @@ do
 
 	test_expect_failure "__git_complete_remote_or_refspec - push other $flag" '
 		sed -e "s/Z$//" >expected <<-EOF &&
-		master-in-other Z
+		main-in-other Z
 		EOF
 		(
 			words=(git push other '$flag' ma) &&
diff --git a/t/test-lib.sh b/t/test-lib.sh
index a863ccee7e..9fa7c1d0f6 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -1712,14 +1712,6 @@ test_lazy_prereq REBASE_P '
 	test -z "$GIT_TEST_SKIP_REBASE_P"
 '
 
-# Special-purpose prereq for transitioning to a new default branch name:
-# Some tests need more than just a mindless (case-preserving) s/master/main/g
-# replacement. The non-trivial adjustments are guarded behind this
-# prerequisite, acting kind of as a feature flag
-test_lazy_prereq PREPARE_FOR_MAIN_BRANCH '
-	test "$GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME" = main
-'
-
 # Ensure that no test accidentally triggers a Git command
 # that runs 'crontab', affecting a user's cron schedule.
 # Tests that verify the cron integration must set this locally