ExpectedException.expectMessage((String) null) is not working

I am writing JUnit4 unit tests and have a condition where I need to assert that an exception was thrown with null message.

@Rule
public final ExpectedException exception = ExpectedException.none();

@Test
public final void testNullException() throws Exception {
    exception.expect(Exception.class);
    exception.expectMessage((String) null);
    mPackage.getInfo(null);
}

The line mPackage.getInfo(null) is throwing an Exception with null message properly, but the JUnit test is failing with the message:

java.lang.AssertionError: 
Expected: (an instance of java.lang.Exception and exception with message a string containing null)
     but: exception with message a string containing null message was null

Is there anyway to test for an exception with a null message in JUnit4 way . (I know I can catch the exception and check for the conditions myself).

---

Using org.hamcrest.Matcher with org.hamcrest.core.IsNull worked for me.

The syntax is,

@Rule
public final ExpectedException exception = ExpectedException.none();

@Test
public final void testNullException() throws Exception {
    exception.expect(Exception.class);
    Matcher<String> nullMatcher = new IsNull<>();
    exception.expectMessage(nullMatcher);
    mPackage.getInfo(null);
}

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