diff --git a/trio/tests/test_deprecate.py b/trio/tests/test_deprecate.py
index a11e9b8d1..421278f0d 100644
--- a/trio/tests/test_deprecate.py
+++ b/trio/tests/test_deprecate.py
@@ -16,6 +16,9 @@
 @pytest.fixture
 def recwarn_always(recwarn):
     warnings.simplefilter("always")
+    # ResourceWarnings about unclosed sockets can occur nondeterministically
+    # (during GC) which throws off the tests in this file
+    warnings.simplefilter("ignore", ResourceWarning)
     return recwarn