diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000000000000000000000000000000000000..de907ac0c334cae2eb35e3413abf8bd616dd3457
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,59 @@
+#
+# This file is a part of the CaosDB Project.
+#
+# Copyright (C) 2019-2021 Indiscale GmbH <info@indiscale.com>
+# Copyright (C) 2019 Henrik tom Wörden <h.tomwoerden@indiscale.com>
+# Copyright (C) 2020 Daniel Hornung <d.hornung@indiscale.com>
+# Copyright (C) 2021 Timm Fitschen <t.fitschen@indiscale.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+
+variables:
+  CI_REGISTRY_IMAGE: $CI_REGISTRY/caosdb/src/caosdb-clib/testenv:latest
+
+image: $CI_REGISTRY_IMAGE
+
+stages:
+  - setup
+  - test
+
+# Build a docker image in which tests for this repository can run
+build-testenv:
+  tags: [ cached-dind ]
+  image: docker:20.10
+  stage: setup
+  script:
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+      # use here general latest or specific branch latest...
+    - docker pull $CI_REGISTRY_IMAGE|| true
+    - docker build 
+      -f test/.docker/Dockerfile
+      --pull
+      --cache-from $CI_REGISTRY_IMAGE
+      -t $CI_REGISTRY_IMAGE .
+    - docker push $CI_REGISTRY_IMAGE
+
+
+# cmocka tests
+test:
+  tags: [ docker ]
+  stage: test
+  script:
+    - mkdir test_build
+    - cd test_build
+    - cmake -DCMAKE_BUILD_TYPE=Debug ..
+    - cmake --build .
+    - ctest
+
diff --git a/test/.docker/Dockerfile b/test/.docker/Dockerfile
new file mode 100644
index 0000000000000000000000000000000000000000..2866eb8c9e89abf3d787e5e53e26dc4f6047b16e
--- /dev/null
+++ b/test/.docker/Dockerfile
@@ -0,0 +1,6 @@
+FROM debian:latest
+RUN apt-get update && \
+    apt-get install -y \
+      cmake
+
+COPY ./ caosdb-clib/
diff --git a/test/test_connection.c b/test/test_connection.c
index 5522a6b776ae01bbbda40b7aaa2016322279325e..8ee7520bfb3537d31e5be8ca722d94dc630cae26 100644
--- a/test/test_connection.c
+++ b/test/test_connection.c
@@ -1,8 +1,8 @@
-#include "connection.h"
-#include <cmocka.h>
 #include <setjmp.h>
 #include <stdarg.h>
 #include <stddef.h>
+#include <cmocka.h>
+#include "connection.h"
 
 static void test_configure_connection(void **state) {
   assert_int_equal(0, configure_connection("localhost", 8080));