When running the AS testsuite, this test case shows an error:
org.jboss.test.security.test.HttpsUnitTestCase

The error message is:
unknown Error N/A
java.lang.NullPointerException
at java.security.Security.insertProviderAt(Security.java:357)
at java.security.Security.addProvider(Security.java:406)
at org.jboss.test.security.test.HttpsUnitTestCase$1.setUp(HttpsUnitTestCase.java:171)
at junit.extensions.TestSetup$1.protect(TestSetup.java:20)
at junit.extensions.TestSetup.run(TestSetup.java:25)

When you look in the source code, this is the line where it fails:
Security.addProvider(SecurityProviderUtil.getJSSEProvider());