diff --git a/tools/docker/scripts/test_aiida.sh b/tools/docker/scripts/test_aiida.sh
index 42708b16b8..63b62e91fb 100755
--- a/tools/docker/scripts/test_aiida.sh
+++ b/tools/docker/scripts/test_aiida.sh
@@ -23,7 +23,8 @@ apt-get install -qq --no-install-recommends \
   plocate \
   sudo \
   git \
-  ssh
+  ssh \
+  mpich
 rm -rf /var/lib/apt/lists/*
 
 # Create and activate a virtual environment for Python packages.