Reproduction steps:
1. Open the attached “TaskTestsInternalException.zip” project
2. Open the “Test Runner” Window (Window > General > Test Runner)
3. Select “NonYieldingTaskTestsFailedInXmlReport (2 tests)”
4. Click “Run Selected”
5. Observe the green checkboxes next to the tests
6. Click “Export Results” and save them
7. Open the results and observe the messages

Expected result: Test Runner GUI results match the export results, no failure messages are shown
Actual result: Failure message is visible in the Exported Results

Reproducible with: 1.4.2 (2021.3.35f1, 2022.3.19f1, 2023.2.10f1, 2023.3.0b7), 1.4.3 (2021.3.35f1, 2022.3.19f1, 2023.2.10f1, 2023.3.0b7)

Reproducible on: Windows 11
Not reproducible on: no other environment tested

Notes:
- A possible workaround is to yield at least one frame/update at the start of every async test or use other async mechanisms e.g. IEnumerator
- Full failure message in the exported results: “<failure><message><![CDATA[System.InvalidOperationException : EditMode test can only yield null]]></message><stack-trace><![CDATA[]]></stack-trace></failure>”