Can't use packages with unit tests

I'm trying to do unit testing on a project that uses TextMeshPro and I'm running into this error: "error CS0246: The type or namespace name 'TMPro' could not be found (are you missing a using directive or an assembly reference?)". Here are the steps to recreate:

- Create a Project
- Install TextMeshPro from the package manager
- Create a script that uses TextMeshPro
- Create an assembly reference in the same directory as the script
- Use the Test Runner to create an Edit Mode test folder
- Create a test
- Create a reference in the Edit Mode Assembly Reference to the script assembly reference
- Create a reference in the Edit Mode Assembly Reference to Unity.TextMeshPro

This issue is similar to the below link, but I wasn't able to solve my issues with the solutions there.
https://forum.unity.com/threads/namespace-tmpro-not-found-in-test-runner-test.541387/

 

Having this issue also with Visual Studio when using 'using TMPro' in scripts.

 

You might want to re-ask the question a little deeper in this forum here:

https://forum.unity.com/forums/testing-automation.211/

 

May I ask why do you make references? Why don't you just put the reference in the assembly file?