diff --git a/tornado/test/runtests.py b/tornado/test/runtests.py
index 6075b1e..dc4fb89 100644
--- a/tornado/test/runtests.py
+++ b/tornado/test/runtests.py
@@ -123,7 +123,6 @@ def main():
# Tornado generally shouldn't use anything deprecated, but some of
# our dependencies do (last match wins).
warnings.filterwarnings("ignore", category=DeprecationWarning)
- warnings.filterwarnings("error", category=DeprecationWarning, module=r"tornado\..*")
warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
warnings.filterwarnings(
"error", category=PendingDeprecationWarning, module=r"tornado\..*"