Index: src/test/api/java/common/javax/swing/plaf/basic/BasicInternalFrameTitlePaneTest.java =================================================================== --- src/test/api/java/common/javax/swing/plaf/basic/BasicInternalFrameTitlePaneTest.java (revision 490282) +++ src/test/api/java/common/javax/swing/plaf/basic/BasicInternalFrameTitlePaneTest.java (working copy) @@ -540,4 +540,13 @@ public void testPaintComponent() { // Note: painting code, cannot test } + + public void testConstructor() { + try { + new BasicInternalFrameTitlePane((JInternalFrame) null); + fail("NPE should be thrown"); + } catch (NullPointerException npe) { + // PASSED + } + } }