--- a/toolkit/components/telemetry/tests/marionette/tests/unit/test_ping_server_received_ping.py
+++ b/toolkit/components/telemetry/tests/marionette/tests/unit/test_ping_server_received_ping.py
@@ -9,12 +9,12 @@ from telemetry_harness.testcase import T
 
 
 class TestPingServer(TelemetryTestCase):
 
     def test_ping_server_received_ping(self):
 
         data = {'sender': 'John', 'receiver': 'Joe', 'message': 'We did it!'}
         headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
-        req = requests.post(self.ping_server_url, data=json.dumps(data), headers=headers)
-        assert req.status_code == 200
+        json_req = requests.post(self.ping_server_url, data=json.dumps(data), headers=headers)
+        assert json_req.status_code == 200
         assert len(self.ping_list) == 1
         assert data['sender'] == self.ping_list[-1]['sender']