PageTester SerializationSupport Error

Using the Tapestry 5 PageTester in your unit tests you will need to add a method to shut it down after each test. If you don't you will get this error.

ERROR SerializationSupport - 
Setting a new service proxy provider when there's already an existing provider. 
This may indicate that you have multiple IoC Registries.

For example.

@Before
public void context() {
  pageTester = new PageTester("tapestry","app", "src/main/webapp");
}
  
@After
public void tearDown() {
  pageTester.shutdown();
}

@Test
public void testStartPage() {
  startPage = pageTester.renderPage("Start");
  assertThat(startPage.getElementById("message").getChildMarkup(), equalTo("Hello"));
}