This test consistently (12/12) fails on OS X 10.10 and also fails on Ubuntu 14.04. I didn't try more systems since the test flaw is obvious: it let's Robot to release button immediately after it is pressed. Sometimes it works but very rarely on OS X. The fix is simple:
--- a/test/javax/swing/JRadioButton/FocusTraversal/FocusTraversal.java
+++ b/test/javax/swing/JRadioButton/FocusTraversal/FocusTraversal.java
@@ -60,6 +60,7 @@
     public static void main(String[] args) throws Exception {
 
         robot = new Robot();
+robot.setAutoDelay(50);
         robot.delay(2000);
         UIManager.LookAndFeelInfo[] lookAndFeelArray
                 = UIManager.getInstalledLookAndFeels();