ADDITIONAL SYSTEM INFORMATION :
$ uname -a
Darwin unit-929.local 19.4.0 Darwin Kernel Version 19.4.0: Wed Mar 4 22:28:40 PST 2020; root:xnu-6153.101.6~15/RELEASE_X86_64 x86_64

A DESCRIPTION OF THE PROBLEM :
The test javax/swing/JInternalFrame/8160248/JInternalFrameDraggingTest.java fails on macOS 10.15.4 with the message Background color is wrong!

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
$ jtreg -v -a -testjdk:jdk-15-ea+17_osx-x64/Contents/Home test/jdk/javax/swing/JInternalFrame/8160248/JInternalFrameDraggingTest.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Test passes
ACTUAL -
#section:main
----------messages:(5/293)----------
command: main -Dsun.java2d.uiScale=1.2 JInternalFrameDraggingTest
reason: User specified action: run main/othervm -Dsun.java2d.uiScale=1.2 JInternalFrameDraggingTest
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules java.desktop
elapsed time (seconds): 3.042
----------configuration:(3/40)----------
Boot Layer
  add modules: java.desktop

----------System.out:(1/51)----------
i 1 rgbCW ffffc900 testRGB ffffc800 rgbCH ffffc900
----------System.err:(13/846)----------
java.lang.RuntimeException: Background color is wrong!
at JInternalFrameDraggingTest.main(JInternalFrameDraggingTest.java:80)
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: Background color is wrong!
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: Background color is wrong!


---------- BEGIN SOURCE ----------
http://hg.openjdk.java.net/jdk/jdk/file/801bd63c32f2/test/jdk/javax/swing/JInternalFrame/8160248/JInternalFrameDraggingTest.java
---------- END SOURCE ----------

FREQUENCY : always