diff --git a/pytest.ini b/pytest.ini
index 4a1dcca16..7d0b19223 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,4 +1,6 @@
 [pytest]
 addopts = --numprocesses auto --pyargs
+# ResourceWarnings are ignored as errors, since they're raised at close
 filterwarnings =
     error
+    always::ResourceWarning