Missed an async.

tests/test-console/src/panel.spec.ts

@@ -87,7 +87,7 @@ describe('console/panel', () => {
     });
 
     describe('#onAfterAttach()', () => {
-      it('should start the session', () => {
+      it('should start the session', async () => {
         Widget.attach(panel, document.body);
         await dismissDialog();
         return panel.session.ready;