diff --git a/README.md b/README.md
index 9008463..e02514f 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ python3 -m flask --app api run --port 8000
 
 ```
 cd api
-python3 -m unittest discover tests
+python3 -m unittest discover -p 'test_*.py'
 ```
 
 ### Run Flake8 and isort
diff --git a/api/api/routes.py b/api/api/routes.py
index a2c3e1f..4fae7dc 100644
--- a/api/api/routes.py
+++ b/api/api/routes.py
@@ -49,7 +49,7 @@ def _ask(request_data, validate_captcha=True, access_key=None):
                                      access_key=access_key)
     ok = validator.validate()
     if not ok:
-        return jsonify(message=validator.errors), validator.http_return_code
+        return jsonify(errors=validator.errors), validator.http_return_code
 
     # convert amount to wei format
     amount_wei = Web3.to_wei(validator.amount, 'ether')
diff --git a/api/tests/test_api_cli.py b/api/tests/test_api_cli.py
index 608dccb..4c39641 100644
--- a/api/tests/test_api_cli.py
+++ b/api/tests/test_api_cli.py
@@ -59,6 +59,7 @@ def test_ask_route_parameters(self):
             'tokenAddress': ERC20_TOKEN_ADDRESS
         })
         self.assertEqual(response.status_code, 429)
+        self.assertIn('errors', response.get_json().keys())
 
 
 if __name__ == '__main__':