diff --git a/pyproject.toml b/pyproject.toml
index 6b0c561f8..10ddd5994 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -274,6 +274,8 @@ markers = [
 ]
 filterwarnings = [
     "ignore::DeprecationWarning:twisted.web.static",
+    # Twisted doesn't close failed sockets after CannotListenError
+    "ignore:Exception ignored in. <socket\\.socket.*laddr=..0\\.0\\.0\\.0., 0.:pytest.PytestUnraisableExceptionWarning",
 ]
 
 [tool.ruff.lint]