diff --git a/ops/testing.py b/ops/testing.py
index 8feaafdf0..942eb5919 100755
--- a/ops/testing.py
+++ b/ops/testing.py
@@ -1602,7 +1602,7 @@ def handle_exec(self,
           (equivalent to ``ExecResult(exit_code=0, stdout=str_or_bytes)``) or an integer
           (equivalent to ``ExecResult(exit_code=return_value)``).
 
-        - A ``result``: For simulations don't need to inspect the execution argument, the
+        - A ``result``: For simulations that don't need to inspect the ``exec`` arguments, the
           registration can be further simplified using the ``result`` argument. This is equivalent
           to setting ``handler=lambda _: result``.