• error in one of the test results?

Question related to mission Caps Lock

Your result:"MDDER THn MD BRIn of MDCstle"
Right result:"MDDER THn MD bRIn of MDCstle"
Fail:caps_lock("Madder than Mad Brian of Madcastle")

Hi, I cannot solve this problem because of this test case, shouldn't the 'b' in 'Brian' be 'B' as the mission info states?