diff --git a/flask_restx/namespace.py b/flask_restx/namespace.py
index 6d55fabe..39d9ae18 100644
--- a/flask_restx/namespace.py
+++ b/flask_restx/namespace.py
@@ -230,9 +230,9 @@ def expect(self, *inputs, **kwargs):
             expect.append(param)
         return self.doc(**params)
 
-    def parser(self):
+    def parser(self, **kwargs):
         """Instanciate a :class:`~RequestParser`"""
-        return RequestParser()
+        return RequestParser(**kwargs)
 
     def as_list(self, field):
         """Allow to specify nested lists for documentation"""
diff --git a/tests/test_namespace.py b/tests/test_namespace.py
index dfc51067..8c4505dc 100644
--- a/tests/test_namespace.py
+++ b/tests/test_namespace.py
@@ -175,6 +175,6 @@ def post(self):
 
         resp = client.post_json("/apples/validation/", data, status=400)
         assert re.match(
-            "Additional properties are not allowed \(u*'agge' was unexpected\)",
+            r"Additional properties are not allowed \(u*'agge' was unexpected\)",
             resp["errors"][""],
         )
diff --git a/tests/test_reqparse.py b/tests/test_reqparse.py
index 2b319ed9..278278d5 100644
--- a/tests/test_reqparse.py
+++ b/tests/test_reqparse.py
@@ -18,6 +18,11 @@ def test_api_shortcut(self, app):
         parser = api.parser()
         assert isinstance(parser, RequestParser)
 
+    def test_api_shortcut_kwargs(self, app):
+        api = Api(app)
+        parser = api.parser(trim=True)
+        assert parser.trim == True
+
     def test_parse_model(self, app):
         model = Model("Todo", {"task": fields.String(required=True)})