def METHOD_NAME(self):
    """'15min' is seen as '15', 'min', not '15min' duration"""
    code, out, err = run_cmd_wait((CALC, "--debug", "15min"))
    self.assertNotIn("token infix '15' Date", out)
    self.assertNotIn("token infix 'min' Identifier", out)
    self.assertNotIn("Error: Unexpected stack size: 2", out)
    self.assertNotIn("Error: Unexpected stack size: 2", err)
    self.assertIn("Eval literal duration ↑'PT15M'", out)
    self.assertRegex(out, re.compile("^PT15M$", re.MULTILINE))