diff --git a/tests/testgtk.c b/tests/testgtk.c
index e3c1816da0..d709e21332 100644
--- a/tests/testgtk.c
+++ b/tests/testgtk.c
@@ -2791,6 +2791,8 @@ create_scrolled_windows (GtkWidget *widget)
       gtk_window_set_title (GTK_WINDOW (window), "dialog");
 
       scrolled_window = gtk_scrolled_window_new (NULL, NULL);
+      gtk_widget_set_hexpand (scrolled_window, TRUE);
+      gtk_widget_set_vexpand (scrolled_window, TRUE);
       gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
 				      GTK_POLICY_AUTOMATIC,
 				      GTK_POLICY_AUTOMATIC);