diff --git a/t/t1503-rev-parse-verify.sh b/t/t1503-rev-parse-verify.sh
index 94fe413ee3..ba43168d12 100755
--- a/t/t1503-rev-parse-verify.sh
+++ b/t/t1503-rev-parse-verify.sh
@@ -132,8 +132,9 @@ test_expect_success 'use --default' '
 	test_must_fail git rev-parse --verify --default bar
 '
 
-test_expect_success 'main@{n} for various n' '
-	N=$(git reflog | wc -l) &&
+test_expect_success !SANITIZE_LEAK 'main@{n} for various n' '
+	git reflog >out &&
+	N=$(wc -l <out) &&
 	Nm1=$(($N-1)) &&
 	Np1=$(($N+1)) &&
 	git rev-parse --verify main@{0} &&