def report_fail()

in teamcity/nose_report.py [0:0]


    def report_fail(self, test, fail_type, err):
        # workaround nose bug on python 3
        if is_string(err[1]):
            err = (err[0], Exception(err[1]), err[2])

        test_id = self.get_test_id(test)

        details = convert_error_to_string(err)

        start_index = details.find(_captured_output_start_marker)
        end_index = details.find(_captured_output_end_marker)

        if 0 <= start_index < end_index:
            # do not log test output twice, see report_finish for actual output handling
            details = details[:start_index] + details[end_index + len(_captured_output_end_marker):]

        try:
            from .jb_local_exc_store import get_exception
            error = get_exception()
            if isinstance(err[1], AssertionError) and isinstance(error, EqualsAssertionError):
                details = convert_error_to_string(err, 1)
                self.messages.testFailed(test_id, message=error.msg, details=details, flowId=test_id, comparison_failure=error)
                return
        except Exception:
            pass
        self.messages.testFailed(test_id, message=fail_type, details=details, flowId=test_id)