diff --git a/atst/app.py b/atst/app.py
index b4b3f943..44c904ea 100644
--- a/atst/app.py
+++ b/atst/app.py
@@ -144,10 +144,6 @@ def make_config():
     config = ConfigParser()
     config.optionxform = str
 
-    config_files = [BASE_CONFIG_FILENAME, ENV_CONFIG_FILENAME]
-    if OVERRIDE_CONFIG_FILENAME:
-        config_files.append(OVERRIDE_CONFIG_FILENAME)
-
     config_files = [BASE_CONFIG_FILENAME, ENV_CONFIG_FILENAME]
     if OVERRIDE_CONFIG_FILENAME:
         config_files.append(OVERRIDE_CONFIG_FILENAME)