diff --git a/interfaces/cython/cantera/test/utilities.py b/interfaces/cython/cantera/test/utilities.py
index 79ac68461e..5f2f20edf2 100644
--- a/interfaces/cython/cantera/test/utilities.py
+++ b/interfaces/cython/cantera/test/utilities.py
@@ -32,6 +32,7 @@ def setUpClass(cls):
         else:
             cls.test_work_dir = tempfile.mkdtemp()
 
+        cantera.make_deprecation_warnings_fatal()
         cantera.add_directory(cls.test_work_dir)
         cls.test_data_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), 'data'))
         cls.cantera_data = os.path.abspath(os.path.join(
diff --git a/test/python/runCythonTests.py b/test/python/runCythonTests.py
index bbccde20e1..54534f2806 100644
--- a/test/python/runCythonTests.py
+++ b/test/python/runCythonTests.py
@@ -36,8 +36,6 @@
 import cantera
 import cantera.test
 
-cantera.make_deprecation_warnings_fatal()
-
 class TestResult(unittest.TextTestResult):
     def __init__(self, *args, **kwargs):
         unittest.TextTestResult.__init__(self, *args, **kwargs)