fix(test): adjust selector tests to new behavior

public/app/features/scopes/tests/selector.test.ts

@@ -1,7 +1,10 @@
+import {act} from "@testing-library/react";
+
 import { config } from '@grafana/runtime';
 import { sceneGraph } from '@grafana/scenes';
 import { DashboardScene } from 'app/features/dashboard-scene/scene/DashboardScene';
 
+import {scopesSelectorScene} from "../instance";
 import { getClosestScopesFacade } from '../utils';
 
 import { applyScopes, cancelScopes, openSelector, selectResultCloud, updateScopes } from './utils/actions';
@@ -22,12 +25,20 @@ describe('Selector', () => {
   let dashboardScene: DashboardScene;
 
   beforeAll(() => {
+    config.featureToggles.singleTopNav = true;
     config.featureToggles.scopeFilters = true;
     config.featureToggles.groupByVariable = true;
   });
 
-  beforeEach(() => {
+  beforeEach(async () => {
     dashboardScene = renderDashboard();
+    // Enable the scope selector
+    scopesSelectorScene?.enable();
+
+    await act(async () => {
+      await scopesSelectorScene?.fetchBaseNodes();
+      await new Promise(resolve => setTimeout(resolve, 0));
+    });
   });
 
   afterEach(async () => {