diff --git a/src/core/server/elasticsearch/integration_tests/client.test.ts b/src/core/server/elasticsearch/integration_tests/client.test.ts
new file mode 100644
index 000000000000..3a4b7c5c4af2
--- /dev/null
+++ b/src/core/server/elasticsearch/integration_tests/client.test.ts
@@ -0,0 +1,57 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import {
+  createTestServers,
+  TestElasticsearchUtils,
+  TestKibanaUtils,
+} from '../../../test_helpers/kbn_server';
+
+describe('elasticsearch clients', () => {
+  let esServer: TestElasticsearchUtils;
+  let kibanaServer: TestKibanaUtils;
+
+  beforeAll(async () => {
+    const { startES, startKibana } = createTestServers({
+      adjustTimeout: jest.setTimeout,
+    });
+
+    esServer = await startES();
+    kibanaServer = await startKibana();
+  });
+
+  afterAll(async () => {
+    await kibanaServer.stop();
+    await esServer.stop();
+  });
+
+  it('does not return deprecation warning when x-elastic-product-origin header is set', async () => {
+    // Header should be automatically set by Core
+    const resp1 = await kibanaServer.coreStart.elasticsearch.client.asInternalUser.indices.getSettings(
+      { index: '.kibana' }
+    );
+    expect(resp1.headers).not.toHaveProperty('warning');
+
+    // Also test setting it explicitly
+    const resp2 = await kibanaServer.coreStart.elasticsearch.client.asInternalUser.indices.getSettings(
+      { index: '.kibana' },
+      { headers: { 'x-elastic-product-origin': 'kibana' } }
+    );
+    expect(resp2.headers).not.toHaveProperty('warning');
+  });
+
+  it('returns deprecation warning when x-elastic-product-orign header is not set', async () => {
+    const resp = await kibanaServer.coreStart.elasticsearch.client.asInternalUser.indices.getSettings(
+      { index: '.kibana' },
+      { headers: { 'x-elastic-product-origin': null } }
+    );
+
+    expect(resp.headers).toHaveProperty('warning');
+    expect(resp.headers!.warning).toMatch('system indices');
+  });
+});
diff --git a/test/api_integration/apis/console/index.ts b/test/api_integration/apis/console/index.ts
new file mode 100644
index 000000000000..ad4f8256f97a
--- /dev/null
+++ b/test/api_integration/apis/console/index.ts
@@ -0,0 +1,15 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import { FtrProviderContext } from '../../ftr_provider_context';
+
+export default function ({ loadTestFile }: FtrProviderContext) {
+  describe('core', () => {
+    loadTestFile(require.resolve('./proxy_route'));
+  });
+}
diff --git a/test/api_integration/apis/console/proxy_route.ts b/test/api_integration/apis/console/proxy_route.ts
new file mode 100644
index 000000000000..d8a5f57a41a6
--- /dev/null
+++ b/test/api_integration/apis/console/proxy_route.ts
@@ -0,0 +1,44 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0 and the Server Side Public License, v 1; you may not use this file except
+ * in compliance with, at your election, the Elastic License 2.0 or the Server
+ * Side Public License, v 1.
+ */
+
+import expect from '@kbn/expect';
+import { FtrProviderContext } from '../../ftr_provider_context';
+
+export default function ({ getService }: FtrProviderContext) {
+  const supertest = getService('supertest');
+
+  describe('POST /api/console/proxy', () => {
+    describe('system indices behavior', () => {
+      it('returns warning header when making requests to .kibana index', async () => {
+        return await supertest
+          .post('/api/console/proxy?method=GET&path=/.kibana/_settings')
+          .set('kbn-xsrf', 'true')
+          .then((response) => {
+            expect(response.header).to.have.property('warning');
+            const { warning } = response.header as { warning: string };
+            expect(warning.startsWith('299')).to.be(true);
+            expect(warning.includes('system indices')).to.be(true);
+          });
+      });
+
+      it('does not forward x-elastic-product-origin', async () => {
+        // If we pass the header and we still get the warning back, we assume that the header was not forwarded.
+        return await supertest
+          .post('/api/console/proxy?method=GET&path=/.kibana/_settings')
+          .set('kbn-xsrf', 'true')
+          .set('x-elastic-product-origin', 'kibana')
+          .then((response) => {
+            expect(response.header).to.have.property('warning');
+            const { warning } = response.header as { warning: string };
+            expect(warning.startsWith('299')).to.be(true);
+            expect(warning.includes('system indices')).to.be(true);
+          });
+      });
+    });
+  });
+}
diff --git a/test/api_integration/apis/index.ts b/test/api_integration/apis/index.ts
index 33495ad2c604..0d87569cb8b9 100644
--- a/test/api_integration/apis/index.ts
+++ b/test/api_integration/apis/index.ts
@@ -10,6 +10,7 @@ import { FtrProviderContext } from '../ftr_provider_context';
 
 export default function ({ loadTestFile }: FtrProviderContext) {
   describe('apis', () => {
+    loadTestFile(require.resolve('./console'));
     loadTestFile(require.resolve('./core'));
     loadTestFile(require.resolve('./general'));
     loadTestFile(require.resolve('./home'));