diff --git a/lumi2/__init__.py b/lumi2/__init__.py
index e7b635f..56cf4a0 100644
--- a/lumi2/__init__.py
+++ b/lumi2/__init__.py
@@ -32,7 +32,7 @@ def create_app(test_config=None):
         pass
 
     # Set up logging
-    if not app.config['DEBUG']:
+    if test_config is None and not app.config['DEBUG']:
         app.logger = logging.getLogger('lumi2')
         app.logger.setLevel(logging.INFO)
         app.logger.propagate = False