diff --git a/.arclint b/.arclint
index f98064824..50876d186 100644
--- a/.arclint
+++ b/.arclint
@@ -1,19 +1,23 @@
 {
     "linters": {
         "format": {
             "type": "clang-format",
             "include": [ "(\\.cc$)", "(\\.hh$)" ],
             "exclude": "(^third-party/)"
         },
 	"python": {
-            "type": "pyflakes",
-	    "bin": "pyflakes3",
+            "type": "flake8",
             "include": [ "(\\.py$)" ],
-            "exclude": "(^third-party/)"
+            "exclude": "(^third-party/)",
+	    "severity.rules": {
+		"(^E)": "error",
+		"(^W)": "warning",
+		"(^F)": "advice"
+	    }
         },
 
         "merges": {
             "type": "merge-conflict"
         }
     }
 }
diff --git a/test/ci/Dockerfile b/test/ci/Dockerfile
index 8cae608bb..3b663cf1f 100644
--- a/test/ci/Dockerfile
+++ b/test/ci/Dockerfile
@@ -1,16 +1,16 @@
 FROM debian:testing
 MAINTAINER Nicolas Richart <nicolas.richart@epfl.ch>
 
 # Make sure the package repository is up to date.
 RUN apt-get -qq update && apt-get -qq -y install \
     g++ gfortran  cmake \
     libmumps-seq-dev libscotch-dev \
     libboost-dev libopenblas-dev \
     python3 python3-dev \
     python3-numpy python3-scipy python3-mpi4py\
     python3-phabricator python3-click python3-yaml \
-    swig3.0 gmsh curl \
+    swig3.0 gmsh curl flake8 \
     git arcanist clang-format xsltproc jq \
     && rm -rf /var/lib/apt/lists/*
 
 # apt-get on one line due to https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#run
diff --git a/test/ci/scripts/harbomaster/__init__.py b/test/ci/scripts/harbomaster/__init__.py
index b88afb730..9d8de9186 100644
--- a/test/ci/scripts/harbomaster/__init__.py
+++ b/test/ci/scripts/harbomaster/__init__.py
@@ -1,26 +1,26 @@
 # for the module
 import sys as __hbm_sys
 
 
 def export(definition):
     """
     Decorator to export definitions from sub-modules to the top-level package
 
     :param definition: definition to be exported
     :return: definition
     """
     __module = __hbm_sys.modules[definition.__module__]
     __pkg = __hbm_sys.modules[__module.__package__]
     __pkg.__dict__[definition.__name__] = definition
 
     if '__all__' not in __pkg.__dict__:
         __pkg.__dict__['__all__'] = []
 
     __pkg.__all__.append(definition.__name__)
 
     return definition
 
 
-from . import ctestresults
-from . import arclint
+from . import ctestresults  
+from . import arclint       
 from . import hbm