On a fresh macOS26 device, this jtreg test consistently fails when it passes on a different mac device using macOS 15.6. This is the only JInternalFrame test to fail on macOS 26.

Test result logs below:

----------System.out:(1/51)----------
i 1 rgbCW ffffc905 testRGB ffffc800 rgbCH ffffc905
----------System.err:(11/658)----------
java.lang.RuntimeException: Background color is wrong!
at JInternalFrameDraggingTest.main(JInternalFrameDraggingTest.java:80)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1474)

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!