diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 9d707d2..002433b 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -559,6 +559,7 @@
 test_expect_success 'use --set-upstream-to modify a particular branch' '
 	git branch my13 &&
 	git branch --set-upstream-to master my13 &&
+	test_when_finished "git branch --unset-upstream my13" &&
 	test "$(git config branch.my13.remote)" = "." &&
 	test "$(git config branch.my13.merge)" = "refs/heads/master"
 '