Fix a type error in a new test
Fix a type error in a new test

hugovk/coveragepy,blueyed/coveragepy,hugovk/coveragepy,hugovk/coveragepy,blueyed/coveragepy,nedbat/coveragepy,hugovk/coveragepy,blueyed/coveragepy,blueyed/coveragepy,nedbat/coveragepy,nedbat/coveragepy,nedbat/coveragepy,nedbat/coveragepy,blueyed/coveragepy,hugovk/coveragepy