diff --git a/docker/Dockerfile.finn_ci b/docker/Dockerfile.finn_ci
index 5772b16abc8b927def1e2dfbbb8193a2f964f87d..951616651a6d231591413ddd617e9d22ca26d9ef 100644
--- a/docker/Dockerfile.finn_ci
+++ b/docker/Dockerfile.finn_ci
@@ -61,6 +61,7 @@ RUN git clone --branch $FINN_CI_BRANCH https://github.com/Xilinx/finn /workspace
 RUN pip install -r /workspace/finn/requirements.txt
 RUN apt update; apt install nano
 RUN pip install pytest-dependency
+RUN pip install pytest-xdist
 
 ENV PYTHONPATH "${PYTHONPATH}:/workspace/finn/src"
 ENV PYTHONPATH "${PYTHONPATH}:/workspace/pyverilator"
diff --git a/docker/Dockerfile.finn_dev b/docker/Dockerfile.finn_dev
index 0e12b504a26ccdb8fd78e162f04cfdeab5a186f1..3c830bf0b5366cc35137c64a496ae3377b144715 100644
--- a/docker/Dockerfile.finn_dev
+++ b/docker/Dockerfile.finn_dev
@@ -55,6 +55,7 @@ RUN pip install matplotlib
 RUN pip install pytest-dependency
 RUN pip install sphinx
 RUN pip install sphinx_rtd_theme
+RUN pip install pytest-xdist
 
 # switch user
 RUN groupadd -g $GID $GNAME