diff --git a/backport_tests b/backport_tests
index be18be2..01d7555 100755
--- a/backport_tests
+++ b/backport_tests
@@ -31,7 +31,7 @@ log_header "Tests exit code"
 # https://github.com/hazelcast/backport/issues/10
 # Find location of a temp directory, where script is _unlikely_ to exist
 TMPDIR=$(mktemp)
-TMPDIR="$(dirname "${SCRIPT_DIR}")"
+TMPDIR="$(dirname "${TMPDIR}")"
 (cd "${TMPDIR}"; test_get_exit_code 2)
 
 assert_eq 0 "${TESTS_RESULT}" "All tests should pass"