Testsuite name: Regression
Test name(s): jdk/test/javax/swing/JRootPane/DefaultButtonTest.java

Product(s) tested: 8u361
OS/architecture: Linux (tested on Ubuntu 22.04, 20.10, 18.04)
Reproducible: Always

Is it a Regression: No. Test is introduced in 8u361 (JDK-8291156) as part of test-colocation efforts.
Is it reproducible on other trains: Tried it on JDK11u, 19u and not reproducible.
Is it a platform specific issue: Yes, issue is seen only with Linux and not reproducible on Windows, Mac platforms