Fix tests for windows

[5nord]

Describe the bug
Some tests fail on Windows machines, because tests expect linux-style path separators.

It might a good idea to add a Windows-image to your GitHub Actions Tests workflow.

To Reproduce
Steps to reproduce the behavior:

1. Run go test ./... in module root.

Expected behavior
All tests pass on Windows machines

[github-actions]

This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 5 days

[altradits]

I am addressing this issue and working on fixing the tests for Windows.