1 files changed, 4 insertions, 0 deletions
diff --git a/t/README b/t/README
index 8eb9e46b1d..a8cfd37387 100644
--- a/t/README
+++ b/t/README
@@ -439,6 +439,10 @@ GIT_TEST_WRITE_REV_INDEX=<boolean>, when true enables the
 GIT_TEST_SPARSE_INDEX=<boolean>, when true enables index writes to use the
 sparse-index format by default.
 
+GIT_TEST_CHECKOUT_WORKERS=<n> overrides the 'checkout.workers' setting
+to <n> and 'checkout.thresholdForParallelism' to 0, forcing the
+execution of the parallel-checkout code.
+
 Naming Tests
 ------------