diff --git a/src/plugins/data/common/search/search_source/fetch/get_search_params.test.ts b/src/plugins/data/common/search/search_source/fetch/get_search_params.test.ts
index 99f813294fe5a..68b9d234e6667 100644
--- a/src/plugins/data/common/search/search_source/fetch/get_search_params.test.ts
+++ b/src/plugins/data/common/search/search_source/fetch/get_search_params.test.ts
@@ -9,7 +9,7 @@
 
 import { UI_SETTINGS } from '../../../constants';
 import { GetConfigFn } from '../../../types';
-import { getSearchParams, getSearchParamsFromRequest } from './get_search_params';
+import { getSearchParamsFromRequest, getEsPreference } from './get_search_params';
 import { createStubDataView } from '@kbn/data-views-plugin/common/data_views/data_view.stub';
 
 function getConfigStub(config: any = {}): GetConfigFn {
@@ -18,11 +18,11 @@ function getConfigStub(config: any = {}): GetConfigFn {
 
 describe('getSearchParams', () => {
   test('includes custom preference', () => {
-    const config = getConfigStub({
+    const getConfig = getConfigStub({
       [UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE]: 'custom',
       [UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE]: 'aaa',
     });
-    const searchParams = getSearchParams(config);
+    const searchParams = getSearchParamsFromRequest({ index: 'abc', body: {} }, { getConfig });
     expect(searchParams.preference).toBe('aaa');
   });
 
@@ -94,4 +94,39 @@ describe('getSearchParams', () => {
     );
     expect(searchParams).not.toHaveProperty('expand_wildcards', 'all');
   });
+
+  describe('getEsPreference', () => {
+    const mockConfigGet = jest.fn();
+
+    beforeEach(() => {
+      mockConfigGet.mockClear();
+    });
+
+    test('returns the session ID if set to sessionId', () => {
+      mockConfigGet.mockImplementation((key: string) => {
+        if (key === UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE) return 'sessionId';
+        if (key === UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE) return 'foobar';
+      });
+      const preference = getEsPreference(mockConfigGet, 'my_session_id');
+      expect(preference).toBe('my_session_id');
+    });
+
+    test('returns the custom preference if set to custom', () => {
+      mockConfigGet.mockImplementation((key: string) => {
+        if (key === UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE) return 'custom';
+        if (key === UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE) return 'foobar';
+      });
+      const preference = getEsPreference(mockConfigGet);
+      expect(preference).toBe('foobar');
+    });
+
+    test('returns undefined if set to none', () => {
+      mockConfigGet.mockImplementation((key: string) => {
+        if (key === UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE) return 'none';
+        if (key === UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE) return 'foobar';
+      });
+      const preference = getEsPreference(mockConfigGet);
+      expect(preference).toBe(undefined);
+    });
+  });
 });
diff --git a/src/plugins/data/common/search/search_source/fetch/get_search_params.ts b/src/plugins/data/common/search/search_source/fetch/get_search_params.ts
index 221e670dae6dc..f1784770fe3ba 100644
--- a/src/plugins/data/common/search/search_source/fetch/get_search_params.ts
+++ b/src/plugins/data/common/search/search_source/fetch/get_search_params.ts
@@ -12,20 +12,16 @@ import { UI_SETTINGS } from '../../../constants';
 import { GetConfigFn } from '../../../types';
 import type { SearchRequest } from './types';
 
-const sessionId = Date.now();
+const defaultSessionId = `${Date.now()}`;
 
-export function getSearchParams(getConfig: GetConfigFn) {
-  return {
-    preference: getPreference(getConfig),
-  };
-}
-
-export function getPreference(getConfig: GetConfigFn) {
-  const setRequestPreference = getConfig(UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE);
-  if (setRequestPreference === 'sessionId') return sessionId;
-  return setRequestPreference === 'custom'
-    ? getConfig(UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE)
-    : undefined;
+export function getEsPreference(
+  getConfigFn: GetConfigFn,
+  sessionId = defaultSessionId
+): SearchRequest['preference'] {
+  const setPreference = getConfigFn<string>(UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE);
+  if (setPreference === 'sessionId') return sessionId;
+  const customPreference = getConfigFn<string>(UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE);
+  return setPreference === 'custom' ? customPreference : undefined;
 }
 
 /** @public */
@@ -36,7 +32,7 @@ export function getSearchParamsFromRequest(
   dependencies: { getConfig: GetConfigFn }
 ): ISearchRequestParams {
   const { getConfig } = dependencies;
-  const searchParams = getSearchParams(getConfig);
+  const searchParams = { preference: getEsPreference(getConfig) };
   // eslint-disable-next-line @typescript-eslint/naming-convention
   const { track_total_hits, ...body } = searchRequest.body;
   const dataView = typeof searchRequest.index !== 'string' ? searchRequest.index : undefined;
diff --git a/src/plugins/data/common/search/search_source/fetch/index.ts b/src/plugins/data/common/search/search_source/fetch/index.ts
index f097189fe4bae..3f621c66eeaa3 100644
--- a/src/plugins/data/common/search/search_source/fetch/index.ts
+++ b/src/plugins/data/common/search/search_source/fetch/index.ts
@@ -7,6 +7,6 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
-export { getSearchParams, getSearchParamsFromRequest, getPreference } from './get_search_params';
+export { getSearchParamsFromRequest, getEsPreference } from './get_search_params';
 export { RequestFailure } from './request_error';
 export * from './types';
diff --git a/src/plugins/data/public/search/es_search/get_es_preference.test.ts b/src/plugins/data/public/search/es_search/get_es_preference.test.ts
deleted file mode 100644
index e9edbdac475d8..0000000000000
--- a/src/plugins/data/public/search/es_search/get_es_preference.test.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-import type { MockedKeys } from '@kbn/utility-types-jest';
-import { getEsPreference } from './get_es_preference';
-import { CoreStart } from '@kbn/core/public';
-import { coreMock } from '@kbn/core/public/mocks';
-import { UI_SETTINGS } from '../../../common';
-
-describe('Get ES preference', () => {
-  let mockCoreStart: MockedKeys<CoreStart>;
-
-  beforeEach(() => {
-    mockCoreStart = coreMock.createStart();
-  });
-
-  test('returns the session ID if set to sessionId', () => {
-    mockCoreStart.uiSettings.get.mockImplementation((key: string) => {
-      if (key === UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE) return 'sessionId';
-      if (key === UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE) return 'foobar';
-    });
-    const preference = getEsPreference(mockCoreStart.uiSettings, 'my_session_id');
-    expect(preference).toBe('my_session_id');
-  });
-
-  test('returns the custom preference if set to custom', () => {
-    mockCoreStart.uiSettings.get.mockImplementation((key: string) => {
-      if (key === UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE) return 'custom';
-      if (key === UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE) return 'foobar';
-    });
-    const preference = getEsPreference(mockCoreStart.uiSettings);
-    expect(preference).toBe('foobar');
-  });
-
-  test('returns undefined if set to none', () => {
-    mockCoreStart.uiSettings.get.mockImplementation((key: string) => {
-      if (key === UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE) return 'none';
-      if (key === UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE) return 'foobar';
-    });
-    const preference = getEsPreference(mockCoreStart.uiSettings);
-    expect(preference).toBe(undefined);
-  });
-});
diff --git a/src/plugins/data/public/search/es_search/get_es_preference.ts b/src/plugins/data/public/search/es_search/get_es_preference.ts
deleted file mode 100644
index e07aaf0ce99a8..0000000000000
--- a/src/plugins/data/public/search/es_search/get_es_preference.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-import { IUiSettingsClient } from '@kbn/core/public';
-import { UI_SETTINGS } from '../../../common';
-
-const defaultSessionId = `${Date.now()}`;
-
-export function getEsPreference(uiSettings: IUiSettingsClient, sessionId = defaultSessionId) {
-  const setPreference = uiSettings.get(UI_SETTINGS.COURIER_SET_REQUEST_PREFERENCE);
-  if (setPreference === 'sessionId') return `${sessionId}`;
-  const customPreference = uiSettings.get(UI_SETTINGS.COURIER_CUSTOM_REQUEST_PREFERENCE);
-  return setPreference === 'custom' ? customPreference : undefined;
-}
diff --git a/src/plugins/data/public/search/es_search/index.ts b/src/plugins/data/public/search/es_search/index.ts
deleted file mode 100644
index 8084588003204..0000000000000
--- a/src/plugins/data/public/search/es_search/index.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-/*
- * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
- * License v3.0 only", or the "Server Side Public License, v 1".
- */
-
-export { getEsPreference } from './get_es_preference';
diff --git a/src/plugins/data/public/search/index.ts b/src/plugins/data/public/search/index.ts
index a2f5c6fe1a3b5..a678d2d4f7521 100644
--- a/src/plugins/data/public/search/index.ts
+++ b/src/plugins/data/public/search/index.ts
@@ -48,7 +48,6 @@ export {
   SEARCH_SESSIONS_MANAGEMENT_ID,
   waitUntilNextSessionCompletes$,
 } from './session';
-export { getEsPreference } from './es_search';
 
 export type { SearchInterceptorDeps } from './search_interceptor';
 export { SearchInterceptor } from './search_interceptor';