Update pytest command and list conda packages

.gitlab-ci.yml

@@ -43,9 +43,10 @@ coverage:
     - source activate bvpy
     # Install built `bvpy` package (from artifacts):
     - conda install conda-bld/linux-64/bvpy-*py37*
+    - conda list
     # Test it with `pytest`:
     - pytest --version
-    - pytest --cov=bvpy -v
+    - pytest -v --cov=bvpy test/
   retry:
     max: 2
     when: runner_system_failure