diff --git a/jenkins.sh b/jenkins.sh
index 90c0dbd..1628f40 100755
--- a/jenkins.sh
+++ b/jenkins.sh
@@ -28,7 +28,7 @@ _EOF_
 
 $PIP_BIN install --upgrade 'pip<8'
 $PIP_BIN install --upgrade setuptools
-$PIP_BIN install --upgrade 'pytest<4.3' 'more-itertools<6' WebTest mock pytest-cov
+$PIP_BIN install --upgrade 'pytest<4.3' 'attrs<19.2' 'more-itertools<6' WebTest mock pytest-cov
 $PIP_BIN install --upgrade 'pylint<1.8' # 1.8 broken (cf wcs build #3023)
 $PIP_BIN install --upgrade 'Django<1.12' 'gadjo' 'pyproj<2' 'requests' 'django-ratelimit<3'
 $PIP_BIN install git+https://git.entrouvert.org/debian/django-ckeditor.git