diff --git a/pytest.ini b/pytest.ini
index 92c555f..67ed440 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,2 +1,7 @@
 [pytest]
 addopts = -ra -v --pyargs pytest_trio --verbose --cov
+filterwarnings =
+    error
+    default::pytest.PytestAssertRewriteWarning
+    default::pytest.PytestDeprecationWarning
+    default::pytest.PytestUnraisableExceptionWarning