We need pytest-subtests.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

.gitlab-ci.yml

@@ -12,7 +12,7 @@ test_sensormapgeo:
   script:
     - source /root/mambaforge/bin/activate ci_env
 
-    - pip install pytest pytest-cov pytest-reporter-html1
+    - pip install pytest pytest-cov pytest-reporter-html1 pytest-subtests
 
     # run tests
     - make pytest