Tests that pass in Pharo 11 don't pass in Pharo 12

[Eliott-Guevel]

Bug description
Some tests that pass in Pharo 11 don't pass in Pharo 12.

To Reproduce
Steps to reproduce the behavior:

1. Load Molecule (dev-incubator branch)

Metacello new
   baseline: 'Molecule';
   repository: 'github://OpenSmock/Molecule:dev-incubator/src';
   load.

2. Execute MolComponentManager's tests in the Molecule-Examples package
3. testDeepCleanupGarbageCollect, testFlushComponents and testGarbageCollect can fail.
   Executing them individually doesn't raise errors, and since the tests pass in Pharo 11 it seems more of a Pharo 12 problem than an setUp and tearDown problem.

Expected behavior
Tests that pass in Pharo 11 should also pass in Pharo 12.

Screenshots
Examples of different outputs

Version information:

• OS: Windows
• Version: 22H2
• Pharo Version: 12

[Ducasse]

Thanks Eliot
Thank for your report. If your tests works in isolation and not in a group it means that you get a dependency between your tests.
The tester runner has been changed to make sure that the tests are not always run in the same order just to spot such hidden and bad dependencies.
So can you check your code because to us this is not a Pharo problem.
S