Merge branch 'hn/refs-test-cleanup'

Test clean-up.

* hn/refs-test-cleanup:
  t7509: avoid direct file access for writing CHERRY_PICK_HEAD
  t1415: avoid direct filesystem access for writing refs
diff --git a/t/t1415-worktree-refs.sh b/t/t1415-worktree-refs.sh
index 66f27d0..a3e6ea0 100755
--- a/t/t1415-worktree-refs.sh
+++ b/t/t1415-worktree-refs.sh
@@ -40,9 +40,8 @@
 '
 
 test_expect_success 'ambiguous main-worktree/HEAD' '
-	mkdir -p .git/refs/heads/main-worktree &&
-	test_when_finished rm -f .git/refs/heads/main-worktree/HEAD &&
-	cp .git/HEAD .git/refs/heads/main-worktree/HEAD &&
+	test_when_finished git update-ref -d refs/heads/main-worktree/HEAD &&
+	git update-ref refs/heads/main-worktree/HEAD $(git rev-parse HEAD) &&
 	git rev-parse main-worktree/HEAD 2>warn &&
 	grep "main-worktree/HEAD.*ambiguous" warn
 '
@@ -54,9 +53,8 @@
 '
 
 test_expect_success 'ambiguous worktrees/xx/HEAD' '
-	mkdir -p .git/refs/heads/worktrees/wt1 &&
-	test_when_finished rm -f .git/refs/heads/worktrees/wt1/HEAD &&
-	cp .git/HEAD .git/refs/heads/worktrees/wt1/HEAD &&
+	git update-ref refs/heads/worktrees/wt1/HEAD $(git rev-parse HEAD) &&
+	test_when_finished git update-ref -d refs/heads/worktrees/wt1/HEAD &&
 	git rev-parse worktrees/wt1/HEAD 2>warn &&
 	grep "worktrees/wt1/HEAD.*ambiguous" warn
 '
diff --git a/t/t7509-commit-authorship.sh b/t/t7509-commit-authorship.sh
index ee6c474..d568593 100755
--- a/t/t7509-commit-authorship.sh
+++ b/t/t7509-commit-authorship.sh
@@ -147,7 +147,7 @@
 	test_tick &&
 	git commit -am "cherry-pick 1" --author="Cherry <cherry@pick.er>" &&
 	git tag cherry-pick-head &&
-	git rev-parse cherry-pick-head >.git/CHERRY_PICK_HEAD &&
+	git update-ref CHERRY_PICK_HEAD $(git rev-parse cherry-pick-head) &&
 	echo "This is a MERGE_MSG" >.git/MERGE_MSG &&
 	echo "cherry-pick 1b" >>foo &&
 	test_tick &&
@@ -162,7 +162,7 @@
 '
 
 test_expect_success '--reset-author with CHERRY_PICK_HEAD' '
-	git rev-parse cherry-pick-head >.git/CHERRY_PICK_HEAD &&
+	git update-ref CHERRY_PICK_HEAD $(git rev-parse cherry-pick-head) &&
 	echo "cherry-pick 2" >>foo &&
 	test_tick &&
 	git commit -am "cherry-pick 2" --reset-author &&