diff --git a/gio/tests/dbus-appinfo.c b/gio/tests/dbus-appinfo.c
index 99b4e24b7..80861fdd1 100644
--- a/gio/tests/dbus-appinfo.c
+++ b/gio/tests/dbus-appinfo.c
@@ -467,7 +467,7 @@ test_flatpak_missing_doc_export (void)
 int
 main (int argc, char **argv)
 {
-  g_test_init (&argc, &argv, NULL);
+  g_test_init (&argc, &argv, G_TEST_OPTION_ISOLATE_DIRS, NULL);
 
   g_test_add_func ("/appinfo/dbusappinfo", test_dbus_appinfo);
   g_test_add_func ("/appinfo/flatpak-doc-export", test_flatpak_doc_export);