completion: add comment for test_completion()

diff --git a/t/t3306-notes-prune.sh b/t/t3306-notes-prune.sh
index c4282179b387c75e084d05075a7fd365c3220cdc..86bf909ee3dfca78f678fdefe961772dcd78d6b1 100755 (executable)
--- a/t/t3306-notes-prune.sh
+++ b/t/t3306-notes-prune.sh
@@ -20,6 +20,9 @@ test_expect_success 'setup: create a few commits with notes' '
        git add file3 &&
        test_tick &&
        git commit -m 3rd &&
+       COMMIT_FILE=.git/objects/5e/e1c35e83ea47cd3cc4f8cbee0568915fbbbd29 &&
+       test -f $COMMIT_FILE &&
+       test-chmtime =+0 $COMMIT_FILE &&
        git notes add -m "Note #3"
 '