diff --git a/tox.ini b/tox.ini
index bebb8cf..7e90f14 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,6 +4,7 @@ envlist = py27, py350, pep8, pyflakes
 [testenv]
 commands = {envpython} -m unittest discover -s tests -p "*test*"
 deps = requests
+usedevelop = true
 
 [testenv:pep8]
 deps =
@@ -20,7 +21,7 @@ commands =
 [testenv:coverage]
 deps = coverage
 commands =
-    {envpython} -m coverage run --source {envsitepackagesdir}/codacy/ -m unittest discover -p "*test*" -s tests
+    {envpython} -m coverage run --source src/codacy -m unittest discover -p "*test*" -s tests
     {envpython} -m coverage xml
 
 [testenv:upload_coverage]