diff --git a/build/fbcode_builder/CMake/fb_py_test_main.py b/build/fbcode_builder/CMake/fb_py_test_main.py
index 41626181b1..0ee1e8cc68 100644
--- a/build/fbcode_builder/CMake/fb_py_test_main.py
+++ b/build/fbcode_builder/CMake/fb_py_test_main.py
@@ -194,7 +194,7 @@ def fileno(self):
         return self._fileno
 
 
-class BuckTestResult(unittest._TextTestResult):
+class BuckTestResult(unittest.TextTestResult):
     """
     Our own TestResult class that outputs data in a format that can be easily
     parsed by buck's test runner.