fsmonitor: update GIT_TEST_FSMONITOR support

diff --git a/t/t0300-credentials.sh b/t/t0300-credentials.sh
index 03bd31e9f22a1964551cb07d76c45ce90a3cd17e..82eaaea0f4954d22861a4733b80aebcc361aca9a 100755 (executable)
--- a/t/t0300-credentials.sh
+++ b/t/t0300-credentials.sh
@@ -294,8 +294,7 @@ test_expect_success 'helpers can abort the process' '
                -c credential.helper="!f() { echo quit=1; }; f" \
                -c credential.helper="verbatim foo bar" \
                credential fill >stdout &&
-       >expect &&
-       test_cmp expect stdout
+       test_must_be_empty stdout
 '
 
 test_expect_success 'empty helper spec resets helper list' '