diff --git a/src/core/server/integration_tests/saved_objects/migrations/group2/cleanup.test.ts b/src/core/server/integration_tests/saved_objects/migrations/group2/cleanup.test.ts
index e1030fe9805e9..8ce37bd473a8a 100644
--- a/src/core/server/integration_tests/saved_objects/migrations/group2/cleanup.test.ts
+++ b/src/core/server/integration_tests/saved_objects/migrations/group2/cleanup.test.ts
@@ -42,10 +42,9 @@ describe('migration v2', () => {
   });
 
   it('clean ups if migration fails', async () => {
-    const { migrator, client } = await setupNextMinor();
-    migrator.prepareMigrations();
+    const { runMigrations, client } = await setupNextMinor();
 
-    await expect(migrator.runMigrations()).rejects.toThrowErrorMatchingInlineSnapshot(`
+    await expect(runMigrations()).rejects.toThrowErrorMatchingInlineSnapshot(`
       "Unable to complete saved object migrations for the [${defaultKibanaIndex}] index: Migrations failed. Reason: 1 corrupt saved object documents were found: corrupt:2baf4de0-a6d4-11ed-ba5a-39196fc76e60
 
       To allow migrations to proceed, please delete or fix these documents.
@@ -135,13 +134,12 @@ const setupBaseline = async () => {
     },
   ];
 
-  const { migrator: baselineMigrator, client } = await getKibanaMigratorTestKit({
+  const { runMigrations, client } = await getKibanaMigratorTestKit({
     types: typesCurrent,
     logFilePath,
   });
 
-  baselineMigrator.prepareMigrations();
-  await baselineMigrator.runMigrations();
+  await runMigrations();
 
   // inject corrupt saved objects directly using esClient
   await Promise.all(
@@ -175,7 +173,7 @@ const setupNextMinor = async () => {
     },
   ];
 
-  const { migrator, client } = await getKibanaMigratorTestKit({
+  return await getKibanaMigratorTestKit({
     types: typesNextMinor,
     kibanaVersion: nextMinor,
     logFilePath,
@@ -203,6 +201,4 @@ const setupNextMinor = async () => {
       },
     },
   });
-
-  return { migrator, client };
 };
diff --git a/src/core/server/integration_tests/saved_objects/migrations/group3/skip_reindex.test.ts b/src/core/server/integration_tests/saved_objects/migrations/group3/skip_reindex.test.ts
index 530676ed9475a..0276a5a03bd5c 100644
--- a/src/core/server/integration_tests/saved_objects/migrations/group3/skip_reindex.test.ts
+++ b/src/core/server/integration_tests/saved_objects/migrations/group3/skip_reindex.test.ts
@@ -22,8 +22,7 @@ import {
 } from '../kibana_migrator_test_kit';
 import { delay } from '../test_utils';
 
-// FLAKY: https://github.com/elastic/kibana/issues/152448
-describe.skip('when migrating to a new version', () => {
+describe('when migrating to a new version', () => {
   let esServer: TestElasticsearchUtils['es'];
   let esClient: ElasticsearchClient;
   let migrator: IKibanaMigrator;
diff --git a/src/core/server/integration_tests/saved_objects/migrations/kibana_migrator_test_kit.ts b/src/core/server/integration_tests/saved_objects/migrations/kibana_migrator_test_kit.ts
index 84404c4773a1b..ebb8cb5c7a697 100644
--- a/src/core/server/integration_tests/saved_objects/migrations/kibana_migrator_test_kit.ts
+++ b/src/core/server/integration_tests/saved_objects/migrations/kibana_migrator_test_kit.ts
@@ -43,7 +43,6 @@ import type { ISavedObjectsRepository } from '@kbn/core-saved-objects-api-server
 import { getDocLinks, getDocLinksMeta } from '@kbn/doc-links';
 import type { DocLinksServiceStart } from '@kbn/core-doc-links-server';
 import { baselineDocuments, baselineTypes } from './kibana_migrator_test_kit.fixtures';
-import { delay } from './test_utils';
 
 export const defaultLogFilePath = Path.join(__dirname, 'kibana_migrator_test_kit.log');
 
@@ -150,7 +149,9 @@ export const getKibanaMigratorTestKit = async ({
 
   const runMigrations = async (rerun?: boolean) => {
     migrator.prepareMigrations();
-    return await migrator.runMigrations({ rerun });
+    const migrationResults = await migrator.runMigrations({ rerun });
+    await loggingSystem.stop();
+    return migrationResults;
   };
 
   const savedObjectsRepository = SavedObjectsRepository.createRepository(
@@ -283,13 +284,12 @@ const registerTypes = (
 };
 
 export const createBaseline = async () => {
-  const { client, migrator, savedObjectsRepository } = await getKibanaMigratorTestKit({
+  const { client, runMigrations, savedObjectsRepository } = await getKibanaMigratorTestKit({
     kibanaIndex: defaultKibanaIndex,
     types: baselineTypes,
   });
 
-  migrator.prepareMigrations();
-  await migrator.runMigrations();
+  await runMigrations();
 
   await savedObjectsRepository.bulkCreate(baselineDocuments, {
     refresh: 'wait_for',
@@ -385,7 +385,6 @@ export const getIncompatibleMappingsMigrator = async ({
 };
 
 export const readLog = async (logFilePath: string = defaultLogFilePath): Promise<string> => {
-  await delay(0.1); // give the logger enough time to write to the file
   return await fs.readFile(logFilePath, 'utf-8');
 };