diff --git a/test/.docker/Dockerfile b/test/.docker/Dockerfile
index 2866eb8c9e89abf3d787e5e53e26dc4f6047b16e..7af10e7eec79119e71c9999eb6562a2f82bac3b3 100644
--- a/test/.docker/Dockerfile
+++ b/test/.docker/Dockerfile
@@ -1,6 +1,6 @@
 FROM debian:latest
 RUN apt-get update && \
-    apt-get install -y \
-      cmake
+    apt-get install -y cmake
+RUN apt-get install -y libcmocka0
 
 COPY ./ caosdb-clib/
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 2f9562cb80e7c438c33cb1952f3320bc1cc3c35f..1ac6166e5eba53302055f9ae44989eb04cc1b9c3 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -8,9 +8,9 @@ if (cmocka-static)
     message(STATUS "Found pre-installed cmocka: ${cmocka-static}")
 elseif (${CMAKE_VERSION} VERSION_LESS "3.14.0")
     message(FATAL_ERROR
-        "Failed to run tests. A pre-installed cmocka could not be found and
-        your cmake version is prior to 3.14. Please consider to upgrade you
-        cmake (>=3.14) or install cmocka.")
+"Failed to run tests. A pre-installed cmocka could not be found and
+your cmake version is prior to 3.14. Please consider to upgrade you
+cmake (>=3.14) or install cmocka.")
 else ()
     include(FetchCMocka)
 endif ()