diff --git a/src/Makefile-tests.am b/src/Makefile-tests.am
index a9554a0e0..05c842850 100644
--- a/src/Makefile-tests.am
+++ b/src/Makefile-tests.am
@@ -9,6 +9,7 @@ dist_stacking_DATA =				\
 	tests/stacking/basic-wayland.metatest	\
 	tests/stacking/minimized.metatest   	\
 	tests/stacking/mixed-windows.metatest   \
+	tests/stacking/set-parent.metatest	\
 	tests/stacking/override-redirect.metatest
 
 mutter-all.test: tests/mutter-all.test.in
diff --git a/src/tests/stacking/set-parent.metatest b/src/tests/stacking/set-parent.metatest
new file mode 100644
index 000000000..e95eaca29
--- /dev/null
+++ b/src/tests/stacking/set-parent.metatest
@@ -0,0 +1,14 @@
+new_client 1 wayland
+create 1/1
+show 1/1
+create 1/2
+show 1/2
+wait
+assert_stacking 1/1 1/2
+
+set_parent 1/1 2
+wait
+assert_stacking 1/2 1/1
+
+local_activate 1/2
+assert_stacking 1/2 1/1
diff --git a/src/tests/test-client.c b/src/tests/test-client.c
index 7e24ab2ea..583608300 100644
--- a/src/tests/test-client.c
+++ b/src/tests/test-client.c
@@ -136,6 +136,31 @@ process_line (const char *line)
         }
 
     }
+  else if (strcmp (argv[0], "set_parent") == 0)
+    {
+      if (argc != 3)
+        {
+          g_print ("usage: menu <window-id> <parent-id>");
+          goto out;
+        }
+
+      GtkWidget *window = lookup_window (argv[1]);
+      if (!window)
+        {
+          g_print ("unknown window %s", argv[1]);
+          goto out;
+        }
+
+      GtkWidget *parent_window = lookup_window (argv[2]);
+      if (!parent_window)
+        {
+          g_print ("unknown parent window %s", argv[2]);
+          goto out;
+        }
+
+      gtk_window_set_transient_for (GTK_WINDOW (window),
+                                    GTK_WINDOW (parent_window));
+    }
   else if (strcmp (argv[0], "show") == 0)
     {
       if (argc != 2)
diff --git a/src/tests/test-runner.c b/src/tests/test-runner.c
index 842944d97..4f1f446af 100644
--- a/src/tests/test-runner.c
+++ b/src/tests/test-runner.c
@@ -767,6 +767,23 @@ test_case_do (TestCase *test,
                            NULL))
         return FALSE;
     }
+  else if (strcmp (argv[0], "set_parent") == 0)
+    {
+      if (argc != 3)
+        BAD_COMMAND("usage: %s <client-id>/<window-id> <parent-window-id>",
+                    argv[0]);
+
+      TestClient *client;
+      const char *window_id;
+      if (!test_case_parse_window_id (test, argv[1], &client, &window_id, error))
+        return FALSE;
+
+      if (!test_client_do (client, error,
+                           "set_parent", window_id,
+                           argv[2],
+                           NULL))
+        return FALSE;
+    }
   else if (strcmp (argv[0], "show") == 0 ||
            strcmp (argv[0], "hide") == 0 ||
            strcmp (argv[0], "activate") == 0 ||