diff --git a/pyproject.toml b/pyproject.toml
index 0898c0c8..5c14389b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -143,6 +143,8 @@ filterwarnings = [
     "ignore:can't resolve package from __spec__ or __package__, falling back on __name__ and __path__:ImportWarning",
     # see https://github.com/dateutil/dateutil/issues/1314
     "ignore:.*datetime.utcfromtimestamp\\(\\) is deprecated.*:DeprecationWarning:",
+    # From anyio https://github.com/agronholm/anyio/pull/715
+    'ignore:Unclosed <MemoryObjectSendStream>:ResourceWarning',
 ]
 
 [tool.mypy]