diff --git a/falcon/testing/client.py b/falcon/testing/client.py
index da4816f7a..8be0a9af8 100644
--- a/falcon/testing/client.py
+++ b/falcon/testing/client.py
@@ -1563,11 +1563,11 @@ def simulate_post(app: Callable[..., Any], path: str, **kwargs: Any) -> Result:
             overrides `body` and sets the Content-Type header to
             ``'application/json'``, overriding any value specified by either
             the `content_type` or `headers` arguments.
-                msgpack(Msgpack serializable): A Msgpack document to serialize as the
-                        body of the request (default: ``None``). If specified,
-                        overrides `body` and sets the Content-Type header to
-                        ``'application/msgpack'``, overriding any value specified by
-                        either the `content_type` or `headers` arguments.
+        msgpack(Msgpack serializable): A Msgpack document to serialize as the
+            body of the request (default: ``None``). If specified,
+            overrides `body` and sets the Content-Type header to
+            ``'application/msgpack'``, overriding any value specified by
+            either the `content_type` or `headers` arguments.
         file_wrapper (callable): Callable that returns an iterable,
             to be used as the value for *wsgi.file_wrapper* in the
             WSGI environ (default: ``None``). This can be used to test
@@ -1679,11 +1679,11 @@ def simulate_put(app: Callable[..., Any], path: str, **kwargs: Any) -> Result:
             overrides `body` and sets the Content-Type header to
             ``'application/json'``, overriding any value specified by either
             the `content_type` or `headers` arguments.
-                msgpack(Msgpack serializable): A Msgpack document to serialize as the
-                        body of the request (default: ``None``). If specified,
-                        overrides `body` and sets the Content-Type header to
-                        ``'application/msgpack'``, overriding any value specified by
-                        either the `content_type` or `headers` arguments.
+        msgpack(Msgpack serializable): A Msgpack document to serialize as the
+            body of the request (default: ``None``). If specified,
+            overrides `body` and sets the Content-Type header to
+            ``'application/msgpack'``, overriding any value specified by
+            either the `content_type` or `headers` arguments.
         file_wrapper (callable): Callable that returns an iterable,
             to be used as the value for *wsgi.file_wrapper* in the
             WSGI environ (default: ``None``). This can be used to test
@@ -1884,11 +1884,11 @@ def simulate_patch(app: Callable[..., Any], path: str, **kwargs: Any) -> Result:
             overrides `body` and sets the Content-Type header to
             ``'application/json'``, overriding any value specified by either
             the `content_type` or `headers` arguments.
-                msgpack(Msgpack serializable): A Msgpack document to serialize as the
-                        body of the request (default: ``None``). If specified,
-                        overrides `body` and sets the Content-Type header to
-                        ``'application/msgpack'``, overriding any value specified by
-                        either the `content_type` or `headers` arguments.
+        msgpack(Msgpack serializable): A Msgpack document to serialize as the
+            body of the request (default: ``None``). If specified,
+            overrides `body` and sets the Content-Type header to
+            `'application/msgpack'``, overriding any value specified by
+            either the `content_type` or `headers` arguments.
         host(str): A string to use for the hostname part of the fully
             qualified request URL (default: 'falconframework.org')
         remote_addr (str): A string to use as the remote IP address for the
@@ -1995,11 +1995,11 @@ def simulate_delete(app: Callable[..., Any], path: str, **kwargs: Any) -> Result
             overrides `body` and sets the Content-Type header to
             ``'application/json'``, overriding any value specified by either
             the `content_type` or `headers` arguments.
-                msgpack(Msgpack serializable): A Msgpack document to serialize as the
-                        body of the request (default: ``None``). If specified,
-                        overrides `body` and sets the Content-Type header to
-                        ``'application/msgpack'``, overriding any value specified by
-                        either the `content_type` or `headers` arguments.
+        msgpack(Msgpack serializable): A Msgpack document to serialize as the
+            body of the request (default: ``None``). If specified,
+            overrides `body` and sets the Content-Type header to
+            ``'application/msgpack'``, overriding any value specified by
+            either the `content_type` or `headers` arguments.
         host(str): A string to use for the hostname part of the fully
             qualified request URL (default: 'falconframework.org')
         remote_addr (str): A string to use as the remote IP address for the