diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2b821514..64239a76 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@
 * Resolve a warning about usage of a deprecated Python `datetime` API from
   Python 3.12.
 
+### Misc
+
+* Turn Python warnings into errors when running the test suite.
+
 ## pg\_activity 3.5.0 - 2024-03-01
 
 ### Added
diff --git a/pytest.ini b/pytest.ini
index df3eb518..66b7567d 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,2 +1,4 @@
 [pytest]
 addopts = --doctest-modules
+filterwarnings =
+  error