Prevent tests from reading set environment variables

What does this MR do and why?

Describe in detail what your merge request does and why.

Prevents the QA tests from failing due to environment variables being set in the project settings.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.