diff --git a/pyproject.toml b/pyproject.toml
index 3d17510d7..3b6dd22e1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -142,6 +142,7 @@ markers = [
     "apps",
     "domain",
     "system",
+    "tags",
 ]
 
 # Useful when pylint is invoked separately instead of flake8