diff --git a/pytest_trio/_tests/conftest.py b/pytest_trio/_tests/conftest.py
index 7e1ccd9..c6481d5 100644
--- a/pytest_trio/_tests/conftest.py
+++ b/pytest_trio/_tests/conftest.py
@@ -1,11 +1 @@
-# Temporary hack while waiting for an answer here:
-#    https://github.com/pytest-dev/pytest/issues/4039
-import pytest
-import warnings
-warnings.filterwarnings(
-    "default",
-    category=pytest.RemovedInPytest4Warning,
-    message=".*non-top-level conftest.*",
-)
-
 pytest_plugins = ["pytester"]
diff --git a/pytest_trio/_tests/test_trio_asyncio.py b/pytest_trio/_tests/test_trio_asyncio.py
index 8a3d9d0..0b00a97 100644
--- a/pytest_trio/_tests/test_trio_asyncio.py
+++ b/pytest_trio/_tests/test_trio_asyncio.py
@@ -3,10 +3,18 @@
 import asyncio
 from async_generator import async_generator, yield_
 
+pytestmark = []
+
 try:
     import trio_asyncio
 except ImportError:
-    pytestmark = pytest.mark.skip(reason="trio-asyncio not available")
+    pytestmark.append(pytest.mark.skip(reason="trio-asyncio not available"))
+
+# https://github.com/python-trio/trio-asyncio/issues/61
+pytestmark.append(
+    pytest.mark.
+    filterwarnings("ignore:trio.Event.clear.*:trio.TrioDeprecationWarning")
+)
 
 
 async def use_asyncio():