guard against tests trying to import this
guard against tests trying to import this

--HG--
branch : trunk

pelme/pytest,inirudebwoy/pytest,jb098/pytest,gabrielcnr/pytest,rouge8/pytest,mhils/pytest,mbirtwell/pytest,tomviner/pytest,wfxiang08/pytest,ionelmc/pytest,RonnyPfannschmidt/pytest,ghostsquad/pytest,malinoff/pytest,Carreau/pytest,nicoddemus/pytest,doordash/pytest,takluyver/pytest,Bjwebb/pytest,pfctdayelise/pytest,vodik/pytest,jb098/pytest,ddboline/pytest,userzimmermann/pytest,mhils/pytest,davidszotten/pytest,vmalloc/dessert,doordash/pytest,flub/pytest,Carreau/pytest,icemac/pytest,ropez/pytest,Haibo-Wang-ORG/pytest,codewarrior0/pytest,rouge8/pytest,codewarrior0/pytest,Haibo-Wang-ORG/pytest,Bachmann1234/pytest,MichaelAquilina/pytest,lukas-bednar/pytest,ojake/pytest,pytest-dev/pytest,tgoodlet/pytest,mdboom/pytest,txomon/pytest,abusalimov/pytest,MengJueM/pytest,ericdill/pytest,markshao/pytest,etataurov/pytest,hpk42/pytest,MengJueM/pytest,mbirtwell/pytest,The-Compiler/pytest,ionelmc/pytest,tomviner/pytest,bubenkoff/pytest,tareqalayan/pytest,ghostsquad/pytest,rmfitzpatrick/pytest,Akasurde/pytest,nicoddemus/repo-test,vodik/pytest,hunse/pytest,pytest-dev/py,alfredodeza/pytest,oleg-alexandrov/pytest,nicoddemus/repo-test,untitaker/pytest,bubenkoff/pytest,The-Compiler/pytest,lukas-bednar/pytest,ericdill/pytest,inirudebwoy/pytest,takluyver/pytest,chillbear/pytest,chillbear/pytest,gabrielcnr/pytest,hackebrot/pytest,eli-b/pytest,abusalimov/pytest,Bjwebb/pytest,JonathonSonesen/pytest,userzimmermann/pytest,ojake/pytest,wfxiang08/pytest,Bachmann1234/pytest,bukzor/pytest,hpk42/pytest,hunse/pytest,untitaker/pytest,oleg-alexandrov/pytest,Magicjarvis/py,bukzor/pytest,ropez/pytest,skylarjhdownes/pytest,chiller/pytest,omarkohl/pytest,chiller/pytest,omarkohl/pytest,icemac/pytest,nicoddemus/pytest,JonathonSonesen/pytest,mdboom/pytest,pelme/pytest,jaraco/pytest