Fix test related to matplotlib bug

4 jobs for fixtests in 13 minutes and 59 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Build
passed build_linux_27 #142932
docker

00:13:58

84.0%
passed build_linux_36 #142933
docker

00:13:59

84.0%
passed build_macosx_27 #142934
macosx

00:09:43

84.0%
passed build_macosx_36 #142935
macosx

00:08:03

84.0%