diff --git a/dockerfiles/ubuntu:19.10/Dockerfile b/dockerfiles/ubuntu:19.10/Dockerfile
index 2c78392..24f472a 100644
--- a/dockerfiles/ubuntu:19.10/Dockerfile
+++ b/dockerfiles/ubuntu:19.10/Dockerfile
@@ -1,13 +1,17 @@
 FROM ubuntu:19.10
 MAINTAINER Guillaume Anciaux <guillaume.anciaux@epfl.ch>
 
 
 ENV LANG C.UTF-8
 ENV LC_ALL C.UTF-8
 
 ## for apt to be noninteractive
 ENV DEBIAN_FRONTEND noninteractive
 ENV DEBCONF_NONINTERACTIVE_SEEN true
 
+# minimal dependencies
 RUN apt-get -qq update && apt-get install -y python3-pip && rm -rf /var/lib/apt/lists/*
 RUN pip3 install jupyter sympy pypdf2 matplotlib wand dill jupyter_contrib_nbextensions pyparsing>=2.3.0
+
+# for testing 
+RUN apt-get -qq update && apt-get install -y python3-pytest python3-pep8 clang-format libmagickwand-dev && rm -rf /var/lib/apt/lists/*
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