diff --git a/tox.ini b/tox.ini
index 90a1f22..744e19e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -113,7 +113,7 @@ passenv = *
 
 [testenv:cover]
 setenv =
-  PYTHON=coverage run --source validations_common --parallel-mode
+  PYTHON=coverage run --source validations_common --parallel-mode --branch
   HOME={envdir}
 commands =
   coverage erase
@@ -121,7 +121,7 @@ commands =
   coverage combine
   coverage html -d cover
   coverage xml -o cover/coverage.xml
-  coverage report
+  coverage report --show-missing
 
 [testenv:docs]
 deps =