Hey, Mocktail looks very similar to Mockito as it seems. As you are using VSCode I recommend the extension Coverage Gutters to show the covered lines in your app. Much easier :)

https://marketplace.visualstudio.com/items?itemName=ryanluker.vscode-coverage-gutters

Here is a post about the setup

https://xeladu.medium.com/show-test-coverage-of-a-flutter-app-in-visual-studio-code-7e26c3b94aaf