diff --git a/plugins/catalog-backend/src/service/response/process.test.ts b/plugins/catalog-backend/src/service/response/process.test.ts
new file mode 100644
index 0000000000..60b96608f7
--- /dev/null
+++ b/plugins/catalog-backend/src/service/response/process.test.ts
@@ -0,0 +1,115 @@
+/*
+ * Copyright 2024 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Entity } from '@backstage/catalog-model';
+import {
+  entitiesResponseToObjects,
+  processEntitiesResponseItems,
+  processRawEntitiesResult,
+} from './process';
+
+const mockTransform = (entity: Entity): Entity => ({
+  ...entity,
+  kind: `transformed-${entity.kind}`,
+});
+
+describe('processRawEntitiesResult', () => {
+  it('should prefer keeping results in raw form', () => {
+    expect(processRawEntitiesResult(['{"kind":"test"}', null])).toEqual({
+      type: 'raw',
+      entities: ['{"kind":"test"}', null],
+    });
+
+    expect(
+      processRawEntitiesResult(['{"kind":"test"}', null], mockTransform),
+    ).toEqual({
+      type: 'object',
+      entities: [{ kind: 'transformed-test' }, null],
+    });
+  });
+});
+
+describe('processEntitiesResponseItems', () => {
+  it('should transform entities in object form', () => {
+    expect(
+      processEntitiesResponseItems({
+        type: 'object',
+        entities: [{ kind: 'test' } as Entity, null],
+      }),
+    ).toEqual({
+      type: 'object',
+      entities: [{ kind: 'test' }, null],
+    });
+
+    expect(
+      processEntitiesResponseItems(
+        {
+          type: 'object',
+          entities: [{ kind: 'test' } as Entity, null],
+        },
+        mockTransform,
+      ),
+    ).toEqual({
+      type: 'object',
+      entities: [{ kind: 'transformed-test' }, null],
+    });
+  });
+
+  it('should transform entities in raw form', () => {
+    expect(
+      processEntitiesResponseItems({
+        type: 'raw',
+        entities: ['{"kind":"test"}', null],
+      }),
+    ).toEqual({
+      type: 'raw',
+      entities: ['{"kind":"test"}', null],
+    });
+
+    expect(
+      processEntitiesResponseItems(
+        {
+          type: 'raw',
+          entities: ['{"kind":"test"}', null],
+        },
+        mockTransform,
+      ),
+    ).toEqual({
+      type: 'object',
+      entities: [{ kind: 'transformed-test' }, null],
+    });
+  });
+});
+
+describe('entitiesResponseToObjects', () => {
+  it('should convert entities in object form', () => {
+    expect(
+      entitiesResponseToObjects({
+        type: 'object',
+        entities: [null, { kind: 'test' } as Entity],
+      }),
+    ).toEqual([null, { kind: 'test' }]);
+  });
+
+  it('should convert entities in raw form', () => {
+    expect(
+      entitiesResponseToObjects({
+        type: 'raw',
+        entities: [null, '{"kind":"test"}'],
+      }),
+    ).toEqual([null, { kind: 'test' }]);
+  });
+});