diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 80f38616e1abbe4e560d9bbfbd2542d02bfe5007..d6066030f5e22234c82fb5bfaefa9bae004a8a8e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -139,7 +139,7 @@ unittest_py37:
   stage: unittest
   image: python:3.7
   script: &python_test_script
-    - pip install nose pandas pytest pytest-cov gitignore-parser openpyxl>=3.0.7 xlrd==1.2 h5py
+    - pip install nose pandas pytest pytest-cov gitignore-parser openpyxl>=3.0.7 xlrd==1.2 h5py jsonref
     - pip install git+https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git@dev
     - pip install .
     - pytest --cov=caosadvancedtools unittests
diff --git a/tox.ini b/tox.ini
index 0e9664c377366923b60e11d138825e1543cc8c7f..ce18fc00b3eac352ac3b5c4fdd4d580961f7b6ee 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,7 @@ deps=nose
     openpyxl >= 3.0.7
     xlrd == 1.2
     h5py
+    jsonref
 commands=py.test --cov=caosadvancedtools -vv {posargs}
 
 [flake8]