javax/swing/text/GlyphView/TestGlyphBGHeight.java was added in JDK 26 b22 via https://bugs.openjdk.org/browse/JDK-8017266 and the test fails in Ubuntu 24.04 X11

----------System.out:(1/9)----------
ffffff00
----------System.err:(11/732)----------
java.lang.RuntimeException: Background is painted taller than needed for styled text
at TestGlyphBGHeight.main(TestGlyphBGHeight.java:97)
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)