title: Flutter Driver: Test file not found
body: <p>I'm attempting to run <code>flutter drive --target=test_driver/app.dart</code> and I get the error:</p>
  <pre><code>Target file &quot;test_driver/app.dart&quot; not found.
  </code></pre>
  <p>So I changed the path to <code>flutter drive --target=lib/test_driver/app.dart</code> and I get the error:</p>
  <pre><code>Using device sdk gphone x86 arm.
  Test file not found: /home/user/Documents/dev/flutter-app/test_driver/test_driver/app_test.dart.
  </code></pre>
  <p>This is my project structure:</p>
  <pre><code>flutter-app/
    lib/
      test_driver/
        app.dart
        app_test.dart
  </code></pre>
  <p>Why can't it locate the test file?</p>