SwingNodeDnDMemoryLeakTest::testSwingNodeMemoryLeak fails sometimes

It is observed that the test SwingNodeDnDMemoryLeakTest .testSwingNodeMemoryLeak fails some times randomly when executed for multiple iterations.
Call stack observed during the failure is as follows:

SwingNodeDnDMemoryLeakTest > testSwingNodeMemoryLeak FAILED
    java.lang.AssertionError: expected:<10> but was:<0>
        at org.junit.Assert.fail(Assert.java:89)
        at org.junit.Assert.failNotEquals(Assert.java:835)
        at org.junit.Assert.assertEquals(Assert.java:647)
        at org.junit.Assert.assertEquals(Assert.java:633)
        at test.javafx.embed.swing.SwingNodeDnDMemoryLeakTest.testSwingNodeMemoryLeak(SwingNodeDnDMemoryLeakTest.java:80)