diff --git a/tox.ini b/tox.ini
index a9f39a8f4..ac52ec5ca 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,9 +12,15 @@ skip_missing_interpreters = True
 deps =
     -r{toxinidir}/fuelweb_test/requirements-devops-source.txt
     -r{toxinidir}/fuelweb_test/requirements.txt
+    mock>=1.2
+    pytest-cov
 usedevelop = False
 commands =
     ./run_system_test.py show-all-groups
+    # Run unit tests and coverage: groups collect does not cover API changes
+    py.test --cov-config .coveragerc --cov-report html --cov=core core/_tests
+    coverage html -d {envlogdir}
+    coverage report --fail-under 75
 
 [testenv:pep8]
 # TODO: #deps = hacking==0.7