diff --git a/t/t3207-branch-submodule.sh b/t/t3207-branch-submodule.sh
index cfde6b237f..fe72b24716 100755
--- a/t/t3207-branch-submodule.sh
+++ b/t/t3207-branch-submodule.sh
@@ -28,6 +28,7 @@ test_no_branch () {
 }
 
 test_expect_success 'setup superproject and submodule' '
+	git config --global protocol.file.allow always &&
 	mkdir test_dirs &&
 	(
 		cd test_dirs &&