diff --git a/.github/workflows/py3_casacore_master.docker b/.github/workflows/py3_casacore_master.docker
index 66fd089..809866c 100644
--- a/.github/workflows/py3_casacore_master.docker
+++ b/.github/workflows/py3_casacore_master.docker
@@ -11,8 +11,8 @@ RUN docker-apt-install \
     python3-six \
     python3-pip \
     python3-nose
-COPY . /code
 WORKDIR /code
+ADD . .
 RUN pip3 install -e .
 RUN pip3 install -r tests/requirements.txt
 RUN nosetests3 --with-coverage --verbose --cover-package=casacore