collector.failures[0] instanceof TestAssertionFailure
        def failure = collector.failures[0] as TestAssertionFailure
        failure.message == "This exception wraps an assertion error"

        // Extract and assert the wrapped failure
        failure.causes.size() == 1
        failure.causes[0] instanceof TestAssertionFailure
        def cause = failure.causes[0] as TestAssertionFailure

            }
        """

        when:
        runTestTaskWithFailureCollection()

        then:
        thrown(BuildException)
        List<TestAssertionFailure> assertionFailures = failures.findAll { println it.stacktrace; it instanceof TestAssertionFailure }
        List<TestFrameworkFailure> frameworkFailures = failures.findAll { it instanceof TestFrameworkFailure }

        assertionFailures.size() == 1