I have an issue with the test, not sure why?

app/clients/email/__init__.py

@@ -0,0 +1,17 @@
+from app.clients import ClientException, Client
+
+
+class EmailClientException(ClientException):
+    '''
+    Base Exception for EmailClients
+    '''
+    pass
+
+
+class EmailClient(Client):
+    '''
+    Base Email client for sending emails.
+    '''
+
+    def send_email(self, *args, **kwargs):
+        raise NotImplemented('TODO Need to implement.')