This test verifies that, after reversion panel is shown, continue typing will dismiss the reversion panel.
After seeing the reversion panel, start typing (excluding whitespace). You should see the panel being dismissed once you start typing.
Note, this test can fail due to user specific spell checking data. If the user has previously frequently revert 'message' to 'mesage'. To fix this, remove all files in ~/Library/Spelling, then kill AppleSpell.service process.