//mobile/flutter/tests/app:basic_runner_test_*
during a google3 roll.

The following exception was being thrown

_TypeError: type 'String' is not a subtype of type 'File'

```
8)
<asynchronous suspension>
utter_command.dart:347:18)
<asynchronous suspension>
/flutter_command.dart:282:33)
<asynchronous suspension>
xt.dart:142:29)
<asynchronous suspension>