diff --git a/test/adapter/json_api/resource_identifier_test.rb b/test/adapter/json_api/resource_identifier_test.rb
index 62b7d93b..1e93b26b 100644
--- a/test/adapter/json_api/resource_identifier_test.rb
+++ b/test/adapter/json_api/resource_identifier_test.rb
@@ -28,15 +28,25 @@ module ActiveModelSerializers
         end
 
         def test_defined_type
-          test_type(WithDefinedTypeSerializer, 'with-defined-type')
+          actual = actual_resource_identifier_object(WithDefinedTypeSerializer)
+          expected = { id: expected_model_id, type: 'with-defined-type' }
+          assert_equal actual, expected
         end
 
         def test_singular_type
-          test_type_inflection(AuthorSerializer, 'author', :singular)
+          actual = with_jsonapi_inflection :singular do
+            actual_resource_identifier_object(AuthorSerializer)
+          end
+          expected = { id: expected_model_id, type: 'author' }
+          assert_equal actual, expected
         end
 
         def test_plural_type
-          test_type_inflection(AuthorSerializer, 'authors', :plural)
+          actual = with_jsonapi_inflection :plural do
+            actual_resource_identifier_object(AuthorSerializer)
+          end
+          expected = { id: expected_model_id, type: 'authors' }
+          assert_equal actual, expected
         end
 
         def test_type_with_namespace
@@ -60,49 +70,38 @@ module ActiveModelSerializers
         end
 
         def test_id_defined_on_object
-          test_id(AuthorSerializer, @model.id.to_s)
+          actual = actual_resource_identifier_object(AuthorSerializer)
+          expected = { id: @model.id.to_s, type: expected_model_type }
+          assert_equal actual, expected
         end
 
         def test_id_defined_on_serializer
-          test_id(WithDefinedIdSerializer, 'special_id')
+          actual = actual_resource_identifier_object(WithDefinedIdSerializer)
+          expected = { id: 'special_id', type: expected_model_type }
+          assert_equal actual, expected
         end
 
         def test_id_defined_on_fragmented
-          test_id(FragmentedSerializer, 'special_id')
+          actual = actual_resource_identifier_object(FragmentedSerializer)
+          expected = { id: 'special_id', type: expected_model_type }
+          assert_equal actual, expected
         end
 
         private
 
-        def test_type_inflection(serializer_class, expected_type, inflection)
-          original_inflection = ActiveModelSerializers.config.jsonapi_resource_type
-          ActiveModelSerializers.config.jsonapi_resource_type = inflection
-          test_type(serializer_class, expected_type)
-        ensure
-          ActiveModelSerializers.config.jsonapi_resource_type = original_inflection
-        end
-
-        def test_type(serializer_class, expected_type)
+        def actual_resource_identifier_object(serializer_class)
           serializer = serializer_class.new(@model)
           resource_identifier = ResourceIdentifier.new(serializer, nil)
-          expected = {
-            id: @model.id.to_s,
-            type: expected_type
-          }
-
-          assert_equal(expected, resource_identifier.as_json)
+          resource_identifier.as_json
         end
 
-        def test_id(serializer_class, id)
-          serializer = serializer_class.new(@model)
-          resource_identifier = ResourceIdentifier.new(serializer, nil)
+        def expected_model_type
           inflection = ActiveModelSerializers.config.jsonapi_resource_type
-          type = @model.class.model_name.send(inflection)
-          expected = {
-            id: id,
-            type: type
-          }
+          @model.class.model_name.send(inflection)
+        end
 
-          assert_equal(expected, resource_identifier.as_json)
+        def expected_model_id
+          @model.id.to_s
         end
       end
     end
diff --git a/test/adapter/json_api/type_test.rb b/test/adapter/json_api/type_test.rb
index 40b84cf2..8d857dd8 100644
--- a/test/adapter/json_api/type_test.rb
+++ b/test/adapter/json_api/type_test.rb
@@ -20,13 +20,13 @@ module ActiveModel
           end
 
           def test_config_plural
-            with_jsonapi_resource_type :plural do
+            with_jsonapi_inflection :plural do
               assert_type(@author, 'authors')
             end
           end
 
           def test_config_singular
-            with_jsonapi_resource_type :singular do
+            with_jsonapi_inflection :singular do
               assert_type(@author, 'author')
             end
           end
@@ -46,14 +46,6 @@ module ActiveModel
             hash = serializable(resource, opts).serializable_hash
             assert_equal(expected_type, hash.fetch(:data).fetch(:type))
           end
-
-          def with_jsonapi_resource_type(inflection)
-            old_inflection = ActiveModelSerializers.config.jsonapi_resource_type
-            ActiveModelSerializers.config.jsonapi_resource_type = inflection
-            yield
-          ensure
-            ActiveModelSerializers.config.jsonapi_resource_type = old_inflection
-          end
         end
       end
     end
diff --git a/test/support/serialization_testing.rb b/test/support/serialization_testing.rb
index 524a3297..4a957976 100644
--- a/test/support/serialization_testing.rb
+++ b/test/support/serialization_testing.rb
@@ -47,6 +47,14 @@ module SerializationTesting
     ActiveModelSerializers.config.replace(old_config)
   end
 
+  def with_jsonapi_inflection(inflection)
+    original_inflection = ActiveModelSerializers.config.jsonapi_resource_type
+    ActiveModelSerializers.config.jsonapi_resource_type = inflection
+    yield
+  ensure
+    ActiveModelSerializers.config.jsonapi_resource_type = original_inflection
+  end
+
   def with_serializer_lookup_disabled
     original_serializer_lookup = ActiveModelSerializers.config.serializer_lookup_enabled
     ActiveModelSerializers.config.serializer_lookup_enabled = false