diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dfdebcd2dc8e7a5cec4e5111eae5541a21bebfd2..a56a9c0284c478164ce633b2d152fbb6f5bd8e6d 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,6 +23,19 @@ build:main:
       - $CI_PROJECT_DIR/build-cmake/doc/html/
     expire_in: 1 week
 
+build:python3:
+  script:
+    - cd /opt/dune/venv
+    - virtualenv dorie3 --py=/usr/bin/python3
+    - source /opt/dune/venv/dorie3/bin/activate && python --version && python -m pip install virtualenv
+    - cd /opt/dune
+    - python --version
+    - ./dune-common/bin/dunecontrol exec "rm -rf build-cmake"
+    - ./dune-common/bin/dunecontrol all
+    - export PATH=/opt/dune/dorie/build-cmake/bin:$PATH
+    - ARGS="--output-on-failure -j 2" ./dune-common/bin/dunecontrol --only=dorie make test
+  stage: build
+
 build:update_dune:
   script:
     - ./dune-common/bin/dunecontrol update || true
diff --git a/bin/dorie.in b/bin/dorie.in
index db19bea32b203de736a20df579d2ab4c45f84634..75a7dbe249691068eb787eb01589e4e4b811b44c 100644
--- a/bin/dorie.in
+++ b/bin/dorie.in
@@ -25,8 +25,8 @@ MPIEXEC_POSTFLAGS = "@MPIEXEC_POSTFLAGS@"
 DORIE_EXECUTABLE = os.path.join(DORIEDIR, "dune/dorie/dorie")
 PARAMETERDIR = os.path.join(DORIEDIR, "doc/default_files")
 DORIE_PYTHON = os.path.join(DORIEDIR, "dune-env")
-def MPIRUN(nproc,exe,*args,mpi_flags=None):
-    mpi_flags = [] if not mpi_flags else list(mpi_flags)
+def MPIRUN(nproc,exe,*args,**kwargs):
+    mpi_flags = [] if not "mpi_flags" in kwargs else kwargs["mpi_flags"]
     return [k for k in [MPIEXEC,MPIEXEC_NUMPROC_FLAG,str(nproc)] \
                         + mpi_flags + [MPIEXEC_PREFLAG,str(exe),
                         MPIEXEC_POSTFLAGS] + list(args) if k]
diff --git a/python/parfield/wrapper/pf_from_file.py.in b/python/parfield/wrapper/pf_from_file.py.in
index c107280046f3b3ac724969a166e9b4dee0bd753b..5a68fc50eba0c471bbeae9d6288d37462fa29804 100644
--- a/python/parfield/wrapper/pf_from_file.py.in
+++ b/python/parfield/wrapper/pf_from_file.py.in
@@ -23,8 +23,8 @@ MPIEXEC_POSTFLAGS = "@MPIEXEC_POSTFLAGS@"
 #
 
 RFG_EXEC = os.path.join(DORIEDIR, "dune/dorie-rfg/dorie-rfg")
-def MPIRUN(nproc,exe,*args,mpi_flags=None):
-    mpi_flags = [] if not mpi_flags else list(mpi_flags)
+def MPIRUN(nproc,exe,*args,**kwargs):
+    mpi_flags = [] if not "mpi_flags" in kwargs else kwargs["mpi_flags"]
     return [k for k in [MPIEXEC,MPIEXEC_NUMPROC_FLAG,str(nproc)] \
                         + mpi_flags + [MPIEXEC_PREFLAG,str(exe),
                         MPIEXEC_POSTFLAGS] + list(args) if k]