diff --git a/t/t9100-git-svn-basic.sh b/t/t9100-git-svn-basic.sh
index 22d8367ff397fc..56acc1e70eea84 100755
--- a/t/t9100-git-svn-basic.sh
+++ b/t/t9100-git-svn-basic.sh
@@ -30,8 +30,7 @@ test_expect_success \
 		echo "deep dir" >dir/a/b/c/d/e/file &&
 		mkdir bar &&
 		echo "zzz" >bar/zzz &&
-		echo "#!/bin/sh" >exec.sh &&
-		chmod +x exec.sh &&
+		write_script exec.sh </dev/null &&
 		svn_cmd import -m "import for git svn" . "$svnrepo" >/dev/null
 	) &&
 	rm -rf import &&