diff --git a/moto/moto_proxy/utils.py b/moto/moto_proxy/utils.py
index e40fdeff6..bd1646506 100644
--- a/moto/moto_proxy/utils.py
+++ b/moto/moto_proxy/utils.py
@@ -61,20 +61,21 @@ def get_body_from_form_data(
         print("YO END")
         return
 
-    parser = multipart.MultipartParser(boundary=boundary,
-                                       callbacks={
-                                           "on_part_begin": on_part_begin,
-                                           "on_part_data": on_part_data,
-                                           "on_part_end": on_part_end,
-                                           "on_header_field": on_header_field,
-                                           "on_header_value": on_header_value,
-                                           "on_header_end": on_header_end,
-                                           "on_headers_finished": on_headers_finished,
-                                           "on_end": on_end,
-                                       }
-                                       )
+    parser = multipart.MultipartParser(
+        boundary=boundary,
+        callbacks={
+            "on_part_begin": on_part_begin,
+            "on_part_data": on_part_data,
+            "on_part_end": on_part_end,
+            "on_header_field": on_header_field,
+            "on_header_value": on_header_value,
+            "on_header_end": on_header_end,
+            "on_headers_finished": on_headers_finished,
+            "on_end": on_end,
+        }
+    )
     parser.write(body)
-    parser.finalize(body)
+    parser.finalize()
 
     print("YO PARTS", parts)
     data = None