diff --git a/tests/helpers.py b/tests/helpers.py
index d72638a..fdb9ee7 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -49,7 +49,8 @@ def create_random_file(folder, content=None):
 
 def create_dir(path):
     '''Create a folder'''
-    os.mkdir(path)
+    if not os.path.exists(path):
+        os.mkdir(path)
     return path