Random failing BasicAliasTest.testBug256837()

[HeikoKlare]

The test case BasicAliasTest.testBug256837() failed in recent I-Build (on Windows): https://download.eclipse.org/eclipse/downloads/drops4/I20240719-1800/testresults/html/org.eclipse.core.tests.resources_ep433I-unit-win32-java17_win32.win32.x86_64_17.html

Expecting actual not to be null

java.lang.AssertionError:
Expecting actual not to be null
at org.eclipse.core.tests.internal.alias.BasicAliasTest.testBug256837(BasicAliasTest.java:434)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

That's probably a regression introduced by the JUnit 5 migration: #1467