Fix the test for tinycss warnings
Fix the test for tinycss warnings

marclaporte/WeasyPrint,Kozea/WeasyPrint,prepare/TestWeasyPrint,andrewleech/WeasyPrint,marclaporte/WeasyPrint,prepare/TestWeasyPrint,Kozea/WeasyPrint,jasco/WeasyPrint,jasco/WeasyPrint,andrewleech/WeasyPrint