DynamicTest.testDynamicRegistry fails randomly #2458
Description
Test org.eclipse.ui.tests.activities.DynamicTest.testDynamicRegistry fails randomly.
Last time it failed on Mac in this PR: #2407
org.eclipse.ui.tests.activities.DynamicTest.testDynamicRegistry -- Time elapsed: 21.31 s <<< FAILURE!
java.lang.AssertionError: Activity Listener not called
at org.junit.Assert.fail(Assert.java:89)
at org.junit.Assert.assertTrue(Assert.java:42)
at org.eclipse.ui.tests.activities.DynamicTest.testDynamicRegistry(DynamicTest.java:480)
...