Well done
Could only be one decision .

The TB requirement is for visa application.
Applicants who completed an online visa application form and paid the online visa application fee before 28 February 2013 will not need to take a tuberculosis test.

If your fiancee come under this then it's solely a personal decision if you prepare or not for a likely question at entry. Worst case scenario is that it'll maybe cause a delay as the X-Ray might be done at the airport. (depend which airport)