Flaky test CanRenderTextOnlyComponent

https://dnceng.visualstudio.com/internal/_build/results?buildId=664692&view=ms.vss-test-web.build-test-results-tab&runId=20610968&paneView=debug&resultId=100295
```
Assert.Equal() Failure
          ↓ (pos 0)
Expected: Hello from TextOnlyComponent
Actual:   
          ↑ (pos 0)
```