diff --git a/t/t1092-sparse-checkout-compatibility.sh b/t/t1092-sparse-checkout-compatibility.sh
index e9a815ca7a..141a7bc65b 100755
--- a/t/t1092-sparse-checkout-compatibility.sh
+++ b/t/t1092-sparse-checkout-compatibility.sh
@@ -390,6 +390,8 @@ test_expect_success 'submodule handling' '
 	test_all_match git add modules &&
 	test_all_match git commit -m "add modules directory" &&
 
+	test_config_global protocol.file.allow always &&
+
 	run_on_all git submodule add "$(pwd)/initial-repo" modules/sub &&
 	test_all_match git commit -m "add submodule" &&