Failure in fzf test does not fail overall test

[KaiHoewelmeyer-TomTom]

|| Error detected while processing command line..function Test[12]..Test_LuaParsing:
|| line    1:
:lua|9| attempt to call global 'parse_rename_line' (a nil value)
|| stack traceback:
:lua|9| in function 'test_parsing'
:lua|1| in main chunk

should fail the test. But it does not.