fix debugging test skipping for older Python versions
fix debugging test skipping for older Python versions

encukou/cython,roxyboy/cython,dahebolangkuan/cython,hhsprings/cython,encukou/cython,andreasvc/cython,acrispin/cython,hickford/cython,mrGeen/cython,slonik-az/cython,cython/cython,larsmans/cython,hickford/cython,madjar/cython,rguillebert/CythonCTypesBackend,c-blake/cython,rguillebert/CythonCTypesBackend,mrGeen/cython,hpfem/cython,JelleZijlstra/cython,ABcDexter/cython,roxyboy/cython,dahebolangkuan/cython,andreasvc/cython,slonik-az/cython,andreasvc/cython,c-blake/cython,acrispin/cython,mcanthony/cython,marscher/cython,hhsprings/cython,hickford/cython,larsmans/cython,da-woods/cython,marscher/cython,acrispin/cython,hpfem/cython,larsmans/cython,madjar/cython,acrispin/cython,achernet/cython,c-blake/cython,slonik-az/cython,c-blake/cython,ChristopherHogan/cython,da-woods/cython,marscher/cython,scoder/cython,mrGeen/cython,mrGeen/cython,cython/cython,achernet/cython,mcanthony/cython,scoder/cython,madjar/cython,ABcDexter/cython,hickford/cython,slonik-az/cython,mcanthony/cython,encukou/cython,encukou/cython,marscher/cython,scoder/cython,fabianrost84/cython,roxyboy/cython,roxyboy/cython,ABcDexter/cython,hickford/cython,hpfem/cython,hhsprings/cython,encukou/cython,marscher/cython,fperez/cython,fperez/cython,achernet/cython,fperez/cython,JelleZijlstra/cython,fabianrost84/cython,achernet/cython,larsmans/cython,mcanthony/cython,achernet/cython,hhsprings/cython,fabianrost84/cython,fabianrost84/cython,cython/cython,mrGeen/cython,fperez/cython,cython/cython,scoder/cython,JelleZijlstra/cython,larsmans/cython,mcanthony/cython,andreasvc/cython,c-blake/cython,da-woods/cython,dahebolangkuan/cython,da-woods/cython,ABcDexter/cython,fperez/cython,acrispin/cython,JelleZijlstra/cython,madjar/cython,rguillebert/CythonCTypesBackend,madjar/cython,hpfem/cython,ChristopherHogan/cython,ChristopherHogan/cython,JelleZijlstra/cython,hhsprings/cython,rguillebert/CythonCTypesBackend,dahebolangkuan/cython,slonik-az/cython,fabianrost84/cython,andreasvc/cython,roxyboy/cython,hpfem/cython,ABcDexter/cython,dahebolangkuan/cython