Beginning from 2022-09 I am not able to execute JUnit Plug-in Tests. Works fine with 2022-06 IDE.

My Setup:

• Tests provided within fragment project
• Target definition based on 2022-06
• Test fragment dependend on:
  org.junit.jupiter.api
  org.junit.jupiter.params
• Execution environment: Java17

When installing an IDE 2022-06 I have a context menu Run As -> JUnit Plug-in Test.
Further tests execute fine and results are displayed in the JUnit view.

Now I switched to an IDE 2022-09, keeping the rest of my setup above.

Finding 1) the context menu entry Run As -> JUnit Plug-in Test is gone. To make it reappear I have to add following dependencies to my fragment:
org.junit.platform.commons;bundle-version="1.8.1",
org.junit.platform.engine;bundle-version="1.8.1",
org.junit.jupiter.engine;bundle-version="5.8.1"

Finding 2) With the context menu back I can launch Unit tests, but after execution the JUnit view shows 0 tests. Trying to run with coverage reveals that the test code is actually not executed.

Followed it down to RemoteTestRunner.java#516
The count returned is always 0, so test discovery somehow does not work.