fix: duplicated tests

[Xiaoy312]

GitHub Issue (If applicable): close #60

PR Type

What kind of change does this PR introduce?

• Bugfix

What is the current behavior?

when using a separate assembly for tests and said assembly name ends with "tests", the tests are run twice.

What is the new behavior?

^no more

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] Tested code with current supported SDKs
• [ ] Docs have been added/updated which fit documentation template. (for bug fixes / features)
• [ ] Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• [ ] Wasm UI Tests are not showing unexpected any differences. Validate PR Screenshots Compare Test Run results.
• [x] Contains NO breaking changes
• [ ] Updated the Release Notes
• [x] Associated with an issue (GitHub or internal)