MAINT: improve test which checks usage of filterwarnings/simplefilter
MAINT: improve test which checks usage of filterwarnings/simplefilter

endolith/scipy,mdhaber/scipy,ilayn/scipy,endolith/scipy,WarrenWeckesser/scipy,zerothi/scipy,andyfaff/scipy,anntzer/scipy,WarrenWeckesser/scipy,anntzer/scipy,WarrenWeckesser/scipy,perimosocordiae/scipy,perimosocordiae/scipy,zerothi/scipy,mdhaber/scipy,scipy/scipy,anntzer/scipy,endolith/scipy,zerothi/scipy,perimosocordiae/scipy,vigna/scipy,mdhaber/scipy,ilayn/scipy,rgommers/scipy,scipy/scipy,mdhaber/scipy,mdhaber/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,ilayn/scipy,andyfaff/scipy,vigna/scipy,andyfaff/scipy,rgommers/scipy,scipy/scipy,vigna/scipy,zerothi/scipy,perimosocordiae/scipy,anntzer/scipy,anntzer/scipy,WarrenWeckesser/scipy,vigna/scipy,andyfaff/scipy,zerothi/scipy,mdhaber/scipy,perimosocordiae/scipy,endolith/scipy,andyfaff/scipy,ilayn/scipy,ilayn/scipy,WarrenWeckesser/scipy,rgommers/scipy,endolith/scipy,rgommers/scipy,WarrenWeckesser/scipy,ilayn/scipy,scipy/scipy,andyfaff/scipy,Stefan-Endres/scipy,anntzer/scipy,Stefan-Endres/scipy,endolith/scipy,scipy/scipy,Stefan-Endres/scipy,rgommers/scipy,zerothi/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,vigna/scipy,scipy/scipy