diff --git a/tests/test_main.py b/tests/test_main.py
index 869a81eaa12ed7c655d44deb6bf9c89029fec18f..f7d999adef63bceac99d1827c3300fe6873a91d7 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -8,7 +8,7 @@ cases = os.path.join(test_dir, 'testcases')
 output = os.path.join(test_dir, 'test_output')
 config['output'] = output
 from unittest.mock import patch
-
+os.mkdir(output)
 
 a = []
 import io