Some swing gtk regression tests fail with "java.lang.InternalError: Unable to load native GTK libraries"

openjdk version "13-ea" 2019-09-17
OpenJDK Runtime Environment (build 13-ea+25)
OpenJDK 64-Bit Server VM (build 13-ea+25, mixed mode, sharing)

Platform Details:
javatestOS=Linux 3.8.13-118.34.1.el7uek.x86_64 (amd64)

Failing tests:
com/sun/java/swing/plaf/gtk/4928019/bug4928019.java
com/sun/java/swing/plaf/gtk/Test6635110.java
com/sun/java/swing/plaf/gtk/Test6963870.java

Error Message:
----------System.err:(16/1077)----------
java.lang.InternalError: Unable to load native GTK libraries
at java.desktop/com.sun.java.swing.plaf.gtk.GTKLookAndFeel.initialize(GTKLookAndFeel.java:1421)
at java.desktop/javax.swing.UIManager.setLookAndFeel(UIManager.java:586)
at java.desktop/javax.swing.UIManager.setLookAndFeel(UIManager.java:633)
at bug4928019.main(bug4928019.java:37)
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:567)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:830)

JavaTest Message: Test threw exception: java.lang.InternalError: Unable to load native GTK libraries
JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.InternalError: Unable to load native GTK libraries

Regression Details:
This issue started from JDK 13 build 25, same test cases pass on JDK 13 build 24.
Issue is reproducible in JDK14 also.