diff --git a/lib/ansible/plugins/connection/__init__.py b/lib/ansible/plugins/connection/__init__.py
index 6bc1994b81..77b8dcd8fc 100644
--- a/lib/ansible/plugins/connection/__init__.py
+++ b/lib/ansible/plugins/connection/__init__.py
@@ -254,7 +254,7 @@ class ConnectionBase(with_metaclass(ABCMeta, object)):
             return False
         elif isinstance(self._play_context.prompt, string_types):
             b_prompt = to_bytes(self._play_context.prompt)
-            return b_output.startswith(b_prompt)
+            return b_prompt in b_output
         else:
             return self._play_context.prompt(b_output)