Intermittent test failure in test.com.sun.webkit.network.CookieTest

We've had several failures recently in this test:

test.com.sun.webkit.network.CookieTest > testParseMaxAge FAILED
    java.lang.AssertionError: Unexpected expiryTime, test string: [foo=bar; Max-Age=9223370545339964], expected:<-9223372036854775802> but was:<9223372036854775807>
        at org.junit.Assert.fail(Assert.java:91)
        at org.junit.Assert.failNotEquals(Assert.java:645)
        at org.junit.Assert.assertEquals(Assert.java:126)
        at org.junit.Assert.assertEquals(Assert.java:470)
        at test.com.sun.webkit.network.CookieTest.assertAsExpected(CookieTest.java:455)
        at test.com.sun.webkit.network.CookieTest.testParseMaxAge(CookieTest.java:204)

It seems to be timing related. It is probably a test bug, but should be evaluated.