diff --git a/tox.ini b/tox.ini
index 2cf47b7..e99d1aa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,23 +13,28 @@
 ; limitations under the License.
 
 [tox]
-envlist = py27,py35,py36,py37
-skip_missing_interpreters = True
+envlist = py27
+;,py35,py36,py37
+skip_missing_interpreters = true
 skipsdist = True
 
 [testenv]
 deps =
   -r requirements.txt
-;  -e lib/cord-workflow-essence-extractor
   nose2
   flake8
-  
+
 commands =
   nose2 -c tox.ini --verbose --junit-xml
-#  flake8
+  flake8
 
 [flake8]
 max-line-length = 119
+exclude =
+  .tox
+  build
+  workflow_examples
+  test/workflow_examples
 
 [unittest]
 plugins = nose2.plugins.junitxml
@@ -38,7 +43,10 @@
 path = nose2-results.xml
 
 [coverage]
-always-on = False
+always-on = True
+coverage =
+  src
+  test
 coverage-report =
   term
   xml
\ No newline at end of file