Fix test that expected a specific error message
Fix test that expected a specific error message

rouge8/pip,xavfernandez/pip,pradyunsg/pip,techtonik/pip,rouge8/pip,sbidoul/pip,rouge8/pip,pradyunsg/pip,sbidoul/pip,pypa/pip,techtonik/pip,pypa/pip,pfmoore/pip,techtonik/pip,xavfernandez/pip,xavfernandez/pip,pfmoore/pip