diff --git a/testproject/.coveragerc b/testproject/.coveragerc
index 443d248..87ca0dc 100644
--- a/testproject/.coveragerc
+++ b/testproject/.coveragerc
@@ -3,8 +3,10 @@ branch = True
 source =
     captcha
 omit =
-    ../*migrations*
-    ../*tests*
-    ../*management*
+    ../captcha/migrations/*
+    ../captcha/tests/*
+    ../captcha/management/*
+
 [report]
 precision = 2
+fail_under = 80.0
diff --git a/tox.ini b/tox.ini
index 956c5d0..9ab05d9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@ envlist =
         py{39,310}-django42-jinja2,
         py{310,311}-django{42,50}-jinja2,
         py312-django{50,51}-jinja2,
-        gettext,flake8,docs
+        gettext,flake8,docs,coverage
 
 [gh-actions]
 python =
@@ -93,3 +93,15 @@ deps =
 changedir = docs
 commands=
         sphinx-build -b html . _build/html
+
+
+[testenv:coverage]
+changedir = testproject
+
+deps =
+        coverage
+
+commands=
+        # coverage debug config
+        coverage run --rcfile=.coveragerc manage.py test captcha
+        coverage report --rcfile=.coveragerc