diff --git a/pyproject.toml b/pyproject.toml
index 0ad41f90b..cd2800bfb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,6 +27,7 @@ markers = [
     "coturn",
     "datetime",
     "deluge",
+    "domain",
     "dynamicdns",
     "ejabberd",
     "gitweb",