diff --git a/test/helpers/functional_helpers.rb b/test/helpers/functional_helpers.rb
index 3d6dc9d3..b3ce85f8 100644
--- a/test/helpers/functional_helpers.rb
+++ b/test/helpers/functional_helpers.rb
@@ -53,7 +53,7 @@ module FunctionalHelpers
     # end
     #
     def json_response
-      JSON.parse(@response.body)
+      @response.parsed_body
     end
   end
-end
\ No newline at end of file
+end
diff --git a/test/integration/requests/request_test.rb b/test/integration/requests/request_test.rb
index 008bb2a6..52531514 100644
--- a/test/integration/requests/request_test.rb
+++ b/test/integration/requests/request_test.rb
@@ -348,7 +348,7 @@ def test_post_polymorphic_with_has_many_relationship
 
     assert_jsonapi_response 201
 
-    body = JSON.parse(response.body)
+    body = response.parsed_body
     person = Person.find(body.dig("data", "id"))
 
     assert_equal "Reo", person.name
@@ -649,7 +649,7 @@ def test_patch_polymorphic_with_has_many_relationship
 
     assert_jsonapi_response 200
 
-    body = JSON.parse(response.body)
+    body = response.parsed_body
     person = Person.find(body.dig("data", "id"))
 
     assert_equal "Reo", person.name