diff --git a/tox.ini b/tox.ini
index 9861fcb6..51e863c8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -71,9 +71,13 @@ commands =
 [testenv:lint]
 basepython = python3.8
 skip_install = true
-deps = pre-commit
+deps =
+    pre-commit
+    interrogate
 passenv = HOMEPATH  # needed on Windows
-commands = pre-commit run --all-files
+commands =
+    pre-commit run --all-files
+    interrogate -vv --fail-under 100 --whitelist-regex "test_.*" tests
 
 
 [testenv:docs]