diff --git a/test/python/runCythonTests.py b/test/python/runCythonTests.py
index 25a68346b5..5a757d67bb 100644
--- a/test/python/runCythonTests.py
+++ b/test/python/runCythonTests.py
@@ -21,7 +21,9 @@
 
 import sys
 import os
+import warnings
 
+warnings.simplefilter('default')
 cantera_root = os.path.relpath(__file__).split(os.sep)[:-1] + ['..', '..']
 py_version = 'python3' if sys.version_info[0] == 3 else 'python2'
 module_path = os.path.abspath(os.sep.join(cantera_root + ['build', py_version]))