BUG: Fix NameError in tab complete warning test
- [ ] closes #xxxx (Replace xxxx with the GitHub issue number)
- [ ] [Tests added and passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#writing-tests) if fixing a bug or adding a new feature
- [ ] All [code checks passed](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit).
- [ ] Added [type annotations](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#type-hints) to new arguments/methods/functions.
- [ ] Added an entry in the latest `doc/source/whatsnew/vX.X.X.rst` file if fixing a bug or adding a new feature.


I was running the unit tests locally and noticed this:
<img width="1049" alt="image" src="https://user-images.githubusercontent.com/122238526/219918687-6005cb1e-b3ac-4fc0-ad48-85be36014135.png">

From what I can tell, this is a problem with the test.

With this pull request, the test now passes without throwing this NameError:
<img width="1030" alt="image" src="https://user-images.githubusercontent.com/122238526/219919331-5a7f58b6-7f1e-4a0f-b9a7-4dadaa9d28f8.png">



I run `pytest pandas` in the terminal:

<img width="998" alt="image" src="https://user-images.githubusercontent.com/122238526/219968285-00bc80e6-8b9f-4604-80b8-8f4e5681a372.png">

I set up my environment using mamba following the instructions:
https://pandas.pydata.org/pandas-docs/stable/development/contributing_environment.html#option-1-using-mamba-recommended i regularly see this in my local test output thx @smij720 