Changed the tests to pass on python 2 as well.
Changed the tests to pass on python 2 as well.

markshao/pytest,RonnyPfannschmidt/pytest,tareqalayan/pytest,rmfitzpatrick/pytest,nicoddemus/pytest,davidszotten/pytest,tomviner/pytest,tomviner/pytest,pfctdayelise/pytest,ddboline/pytest,flub/pytest,nicoddemus/pytest,pytest-dev/pytest,alfredodeza/pytest,Akasurde/pytest,MichaelAquilina/pytest,hackebrot/pytest,The-Compiler/pytest,The-Compiler/pytest,txomon/pytest