test: do no load local config when testing

ash.py

@@ -4,6 +4,7 @@
 
 from __future__ import annotations
 
+import os
 import re
 import pprint
 import itertools
@@ -27,10 +28,11 @@ class DefaultConfig:
 
 app = flask.Flask(__name__, static_url_path='/tweet/static')
 app.config.from_object(DefaultConfig)
-try:
-    app.config.from_object('config.Config')
-except ImportError:
-    pass
+if not os.environ.get('TESTING'):
+    try:
+        app.config.from_object('config.Config')
+    except ImportError:
+        pass
 
 
 # Set up external Tweets support

tests/conftest.py

@@ -7,11 +7,11 @@
 import pytest
 from elasticsearch import Elasticsearch
 
-from ash import app
-
 
 @pytest.fixture
 def client(es_host, es_index):
+    os.environ['TESTING'] = 'True'
+    from ash import app
     app.config.update({
         'TESTING': True,
         'T_ES_HOST': es_host,