The test javax/swing/plaf/nimbus/8041642/ScrollBarThumbVisibleTest.java fails with the following output :

#section:main
----------messages:(5/224)----------
command: main ScrollBarThumbVisibleTest
reason: Assumed action based on file name: run main ScrollBarThumbVisibleTest
Mode: othervm
Additional options from @modules: --add-modules java.desktop
elapsed time (seconds): 1.341
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(2/68)----------
java.awt.Color[r=214,g=217,b=223]
java.awt.Color[r=214,g=217,b=223]
----------System.err:(14/841)----------
metalEnabled=1
java.lang.RuntimeException: Thump is not visible
at ScrollBarThumbVisibleTest.main(ScrollBarThumbVisibleTest.java:75)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)

JavaTest Message: Test threw exception: java.lang.RuntimeException: Thump is not visible
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Thump is not visible

The failure was not observed on OpenJDK builds jdk-14-ea+33_osx-x64, jdk-15-ea+7_osx-x64

The reproducibility: 100%
Steps to reproduce:

$ jtreg -Dsun.java2d.metal=true -testjdk:[path_to_lanai_home] test/jdk/javax/swing/plaf/nimbus/8041642/ScrollBarThumbVisibleTest.java