diff --git a/tests/main.py b/tests/main.py
index 509724e..779445d 100755
--- a/tests/main.py
+++ b/tests/main.py
@@ -10,7 +10,7 @@
 import sys
 import os
 
-base_dir = os.path.dirname(os.path.abspath(__name__))
+base_dir = os.path.dirname(os.path.abspath(__file__))
 ext_path = os.path.join(base_dir, os.pardir, 'ext')
 
 sys.path.insert(0, base_dir)