diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 37a931c045a0de13445b5af4e7e677c245072693..c69241a025b2dc7494ea168c82a42bbf252bdf67 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -20,6 +20,7 @@ RUN apt-get install -y openjdk-11-jdk-headless
 
 # build and run tests
 CMD ls -la && \
+    ls -la /usr/local/lib/ && \
     mkdir build && \
     cd build && \
     /wait-for-it.sh caosdb-server:10443 -t 500 -- \