--- a/watchman/python/tests/tests.py
+++ b/watchman/python/tests/tests.py
@@ -28,13 +28,6 @@ from pywatchman import (
 )
 
 
-if os.path.basename(bser.__file__) == "pybser.py":
-    raise Exception(
-        "bser module resolved to pybser! Something is broken in your build. __file__={!r}, sys.path={!r}".format(
-            bser.__file__, sys.path
-        )
-    )
-
 PILE_OF_POO = "\U0001F4A9"
 NON_UTF8_STRING = b"\xff\xff\xff"