diff --git a/src/quattro/cancelscope.py b/src/quattro/cancelscope.py
index 6188468..079c4e5 100644
--- a/src/quattro/cancelscope.py
+++ b/src/quattro/cancelscope.py
@@ -153,7 +153,7 @@ def __exit__(
             ):
                 self.cancelled_caught = True
                 if self._raise_on_cancel:
-                    raise TimeoutError()
+                    raise TimeoutError() from None
                 return True
             return None