diff --git a/test/api_integration/apis/saved_objects/migrations.ts b/test/api_integration/apis/saved_objects/migrations.ts
index 69beb017a540d1..fa9c2fd1a2d7fe 100644
--- a/test/api_integration/apis/saved_objects/migrations.ts
+++ b/test/api_integration/apis/saved_objects/migrations.ts
@@ -54,8 +54,7 @@ function getLogMock() {
 export default ({ getService }: FtrProviderContext) => {
   const esClient = getService('es');
 
-  // FAILING ES PROMOTION: https://github.com/elastic/kibana/issues/84438
-  describe.skip('Kibana index migration', () => {
+  describe('Kibana index migration', () => {
     before(() => esClient.indices.delete({ index: '.migrate-*' }));
 
     it('Migrates an existing index that has never been migrated before', async () => {
@@ -313,7 +312,10 @@ export default ({ getService }: FtrProviderContext) => {
         result
           // @ts-expect-error destIndex exists only on MigrationResult status: 'migrated';
           .map(({ status, destIndex }) => ({ status, destIndex }))
-          .sort((a) => (a.destIndex ? 0 : 1))
+          .sort(({ destIndex: a }, { destIndex: b }) =>
+            // sort by destIndex in ascending order, keeping falsy values at the end
+            (a && !b) || a < b ? -1 : (!a && b) || a > b ? 1 : 0
+          )
       ).to.eql([
         { status: 'migrated', destIndex: '.migration-c_2' },
         { status: 'skipped', destIndex: undefined },