Check error instance for arguments test

[IswaryaS]

Fixes #1087

First commit - I'd like verify that this is the expected change in the tests. Once that is done, will update in all the tests.

Checklist

• I have read the documentation.
• I have included a pull request description of my changes.
• I have included some tests.
• If it's a new feature, I have included documentation updates in both the README and the types.

[IswaryaS]

Hey, @szmarczak is this PR fine for the issue mentioned? Please read description as I've only changed for a single test right now..

P.S. ignore all commits except latest one - those are from previous PR. Hope that one has no work left and can be merged?

[szmarczak]

Please don't duplicate PRs, you need to wait until the previous one gets merged.

[szmarczak]

Or, if the changes don't rely on the previous PR then you can remove those commits.

[IswaryaS]

Will remove those commits shortly.

[szmarczak]

LGTM, it would be awesome if you could the TODOs mentioned above as well ❤️

[szmarczak]

Thanks a lot! 🥇

[IswaryaS]

@szmarczak Hey. I'm looking to pick up some more tasks, maybe slightly more challenging. If there's any change in particular you'd like to be done for this repository, let me know and I'll take a look. That's if you don't mind and willing to help me out if needed.

[szmarczak]

Sure, thanks for your interest! Here you go: #1462