diff --git a/tests/reftests/gtk-reftest.c b/tests/reftests/gtk-reftest.c
index 012c0b4122..492031bc4b 100644
--- a/tests/reftests/gtk-reftest.c
+++ b/tests/reftests/gtk-reftest.c
@@ -243,6 +243,7 @@ snapshot_widget (GtkWidget *widget, SnapshotMode mode)
     }
 
   cairo_destroy (cr);
+  g_main_loop_unref (loop);
   gtk_widget_destroy (widget);
 
   return surface;