diff --git a/device-detection/fiftyone_devicedetection_examples/tests/test_onpremisegettingstartedweb.py b/device-detection/fiftyone_devicedetection_examples/tests/test_onpremisegettingstartedweb.py
index 9787fe3c..2ffd2896 100644
--- a/device-detection/fiftyone_devicedetection_examples/tests/test_onpremisegettingstartedweb.py
+++ b/device-detection/fiftyone_devicedetection_examples/tests/test_onpremisegettingstartedweb.py
@@ -39,11 +39,23 @@ class OnPremiseGettingStartedWebTests(flask_unittest.ClientTestCase):
     config = GettingStartedWeb.build_config()
     app = GettingStartedWeb().build(config, logger).app
 
+    # The example's config.json shares usage, so sending is stood in for
+    # while the tests run and while the pipeline closes, and no usage data
+    # leaves the machine the tests run on.
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+        cls.sending = mock.patch("requests.post")
+        cls.sending.start()
+
     # The example's pipeline lives as long as its app, so it is closed once
     # the tests are finished with the app.
     @classmethod
     def tearDownClass(cls):
-        GettingStartedWeb.pipeline.close()
+        try:
+            GettingStartedWeb.pipeline.close()
+        finally:
+            cls.sending.stop()
         super().tearDownClass()
 
     def test_onpremise_getting_started_web(self, client):
diff --git a/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/devicedetection_onpremise.py b/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/devicedetection_onpremise.py
index 3a078053..28e0ddaa 100644
--- a/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/devicedetection_onpremise.py
+++ b/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/devicedetection_onpremise.py
@@ -242,6 +242,11 @@ def __init__(
         if update_matched_useragent is not None:
             config.setUpdateMatchedUserAgent(update_matched_useragent)
 
+        # Whether the matched User-Agents are recorded, which the native
+        # default turns on. UserAgents is empty when they are not.
+        self.update_matched_useragent = (
+            update_matched_useragent is None or bool(update_matched_useragent))
+
         if allow_unmatched == True or allow_unmatched == False:
             config.setAllowUnmatched(allow_unmatched)
 
diff --git a/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/swig_data.py b/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/swig_data.py
index e7e6252d..270f7aa4 100644
--- a/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/swig_data.py
+++ b/device-detection/fiftyone_devicedetection_onpremise/src/fiftyone_devicedetection_onpremise/swig_data.py
@@ -120,6 +120,10 @@ def get_internal(self, key):
             return AspectPropertyValue(value = self.swig_results.getDeviceId())
 
         if key == 'useragents':
+            # Populated only when the engine records the matched
+            # User-Agents, as its default is an empty list.
+            if not getattr(self.flow_element, "update_matched_useragent", True):
+                return AspectPropertyValue(value = [])
             # Each component's result has a matched User-Agent, and several
             # can match the same one, which is listed once.
             useragents = []
diff --git a/device-detection/fiftyone_devicedetection_onpremise/tests/test_update_matched_useragent.py b/device-detection/fiftyone_devicedetection_onpremise/tests/test_update_matched_useragent.py
index c46e193c..15cca36e 100644
--- a/device-detection/fiftyone_devicedetection_onpremise/tests/test_update_matched_useragent.py
+++ b/device-detection/fiftyone_devicedetection_onpremise/tests/test_update_matched_useragent.py
@@ -84,9 +84,10 @@ def test_turned_on_populates_user_agents(self):
             self._user_agents(update_matched_useragent=True))
 
     def test_turned_off_leaves_user_agents_empty(self):
-        user_agents = self._user_agents(update_matched_useragent=False)
-        self.assertGreaterEqual(len(user_agents), 1)
-        self.assertEqual([""] * len(user_agents), user_agents)
+        # UserAgents is populated only when the option is on, and its
+        # default is an empty list.
+        self.assertEqual(
+            [], self._user_agents(update_matched_useragent=False))
 
 
 @unittest.skipUnless(