diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 6650d33fba..964e1f1569 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -11,9 +11,9 @@ test_description='test bash completion'
 # untraceable with such ancient Bash versions.
 test_untraceable=UnfortunatelyYes
 
-# Override environment and always use master for the default initial branch
+# Override environment and always use main for the default initial branch
 # name for these tests, so that rev completion candidates are as expected.
-GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=master
+GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 
 . ./lib-bash.sh
@@ -1453,7 +1453,7 @@ test_expect_success 'git bisect - start subcommand arguments before double-dash
 		HEAD Z
 		final Z
 		initial Z
-		master Z
+		main Z
 		EOF
 	)
 '