diff --git a/docker/rootfs/usr/local/bin/run-tests.sh b/docker/rootfs/usr/local/bin/run-tests.sh
index f2baf135f8..23452ec413 100755
--- a/docker/rootfs/usr/local/bin/run-tests.sh
+++ b/docker/rootfs/usr/local/bin/run-tests.sh
@@ -3,7 +3,7 @@
 export DEBIAN_FRONTEND=noninteractive
 
 apt-get update
-apt-get install -y --no-install-recommends tesseract-ocr-deu
+apt-get install -y --no-install-recommends gcc python-dev tesseract-ocr-deu
 
 $MAYAN_PIP_BIN install -r ${MAYAN_INSTALL_DIR}/testing-base.txt