- Run JetBrains Rider in Internal mode as described here;
- Go to File | Settings | Build, Execution, Deployment | UnitTesting | Test Runner | Set "Logging Level" to TRACE | Save;
- Reproduce the issue;
- Collect logs bundle with Help | Collect Logs;
- Share the resulting ZIP archive.
Hint: Don't forget to disable logging at File | Settings | Build, Execution, Deployment | UnitTesting | Test Runner when you don't need it anymore, since gathering log files might affect the performance and disk space.