Question: I am working with spyder - python. I want to test my codes. I have followed the `pip install spyder-unittest` and `pip install pytest`. I have restarted the kernel and restarted my MAC as well. Yet, Unit Testing tab does not appear. Even when I drop down Run cannot find the Run Unit test. Does someone know how to do this?

Answer: 
So, I solved the issue by running the command:

`conda config --set channel_priority false`. 

And then proceeded with the `unittest` download with the command run:

`conda install -c spyder-ide spyder-unittest`. 

The first command run `conda config --set channel_priority false` may solve other issues such as:

`Solving environment: failed with initial frozen solve. Retrying with flexible solve`
I solved a similar problem by doing the following:

```
conda update --all --yes
conda install -c spyder-ide spyder-unittest

```