Avoid displaying the same warning multiple times for an item
Avoid displaying the same warning multiple times for an item

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