classResult.assertTestCaseStdout("m2", is("m2 out\n"))

        if (providesClassListener(version)) {
            classResult.assertStderr(is("beforeClass err\n"))
            classResult.assertStdout(is("beforeClass out\n"))
        } else {
            classResult.assertStderr(is(""))
            classResult.assertStdout(is(""))
        }
    }

            testClassResults*.assertTestCaseStdout(removeParentheses(testCaseName), matcher)
            this
        }

        TestClassExecutionResult assertStderr(Matcher<? super String> matcher) {
            testClassResults*.assertStderr(matcher)
            this
        }

        TestClassExecutionResult assertTestCaseStderr(String testCaseName, Matcher<? super String> matcher) {

            .assertTestsExecuted("some test", "some test two", "some failing test")
            .assertStdout(equalTo("""1st output message
2nd output message
"""))
            .assertStderr(equalTo("err"))

        and:
        xml == """<?xml version="1.0" encoding="UTF-8"?>

        TestClassExecutionResult assertTestCaseStdout(String testCaseName, Matcher<? super String> matcher) {
            throw new UnsupportedOperationException()
        }

        TestClassExecutionResult assertStderr(Matcher<? super String> matcher) {
            return assertOutput('Standard error', matcher)
        }

        private HtmlTestClassExecutionResult assertOutput(heading, Matcher<? super String> matcher) {

        def stdout = testClassNode.'system-out'[0].text();
        assertThat(stdout, matcher)
        this
    }

    TestClassExecutionResult assertStderr(Matcher<? super String> matcher) {
        def stderr = testClassNode.'system-err'[0].text();
        assertThat(stderr, matcher)
        this
    }