diff --git a/x-pack/test/functional/es_archives/task_manager_tasks/data.json b/x-pack/test/functional/es_archives/task_manager_tasks/data.json
index eb0db58dfb385..b84cec27c1fab 100644
--- a/x-pack/test/functional/es_archives/task_manager_tasks/data.json
+++ b/x-pack/test/functional/es_archives/task_manager_tasks/data.json
@@ -2,11 +2,9 @@
   "type": "doc",
   "value": {
     "id": "task:be7e1250-3322-11eb-94c1-db6995e84f6a",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.16.0"
-      },
+      "typeMigrationVersion": "7.16.0",
       "references": [
       ],
       "task": {
@@ -33,11 +31,9 @@
   "type": "doc",
   "value": {
     "id": "task:be7e1250-3322-11eb-94c1-db6995e8389f",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.16.0"
-      },
+      "typeMigrationVersion": "7.16.0",
       "references": [
       ],
       "task": {
@@ -64,11 +60,9 @@
   "type": "doc",
   "value": {
     "id": "task:d33d7590-8377-11ec-8c11-2dfe94229b95",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.6.0"
-      },
+      "typeMigrationVersion": "7.6.0",
       "task": {
         "taskType": "alerting:xpack.uptime.alerts.monitorStatus",
         "retryAt": null,
@@ -95,11 +89,9 @@
   "type": "doc",
   "value": {
     "id": "task:ce7e1250-3322-11eb-94c1-db6995e84f6d",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.16.0"
-      },
+      "typeMigrationVersion": "7.16.0",
       "references": [
       ],
       "task": {
@@ -126,11 +118,9 @@
   "type": "doc",
   "value": {
     "id": "task:fe7e1250-3322-11eb-94c1-db6395e84f6e",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.16.0"
-      },
+      "typeMigrationVersion": "7.16.0",
       "references": [
       ],
       "task": {
@@ -157,11 +147,9 @@
   "type": "doc",
   "value": {
     "id": "task:ge7e1250-3322-11eb-94c1-db6395e84f6g",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.16.0"
-      },
+      "typeMigrationVersion": "7.16.0",
       "references": [
       ],
       "task": {
@@ -188,11 +176,9 @@
   "type": "doc",
   "value": {
     "id": "task:ie7e1250-3322-11eb-94c1-db6395e84f6i",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.16.0"
-      },
+      "typeMigrationVersion": "7.16.0",
       "references": [
       ],
       "task": {
@@ -219,11 +205,9 @@
   "type": "doc",
   "value": {
     "id": "task:d0487a50-c7f1-11ed-aefe-691acd8d4e25",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "8.5.0"
-      },
+      "typeMigrationVersion": "8.5.0",
       "task": {
           "retryAt": null,
           "runAt": "2023-03-21T14:08:29.777Z",
@@ -255,11 +239,9 @@
   "type": "doc",
   "value": {
     "id": "task:cf0ced10-c7f1-11ed-aefe-691acd8d4e25",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "8.5.0"
-      },
+      "typeMigrationVersion": "8.5.0",
       "task": {
           "retryAt": null,
           "runAt": "2023-03-21T14:08:29.777Z",
diff --git a/x-pack/test/functional/es_archives/task_manager_tasks/mappings.json b/x-pack/test/functional/es_archives/task_manager_tasks/mappings.json
deleted file mode 100644
index fe502959e9ec6..0000000000000
--- a/x-pack/test/functional/es_archives/task_manager_tasks/mappings.json
+++ /dev/null
@@ -1,121 +0,0 @@
-{
-  "type": "index",
-  "value": {
-    "aliases": {
-      ".kibana_task_manager": {
-      }
-    },
-    "index": ".kibana_task_manager_1",
-    "mappings": {
-      "_meta": {
-        "migrationMappingPropertyHashes": {
-          "migrationVersion": "4a1746014a75ade3a714e1db5763276f",
-          "namespace": "2f4316de49999235636386fe51dc06c1",
-          "namespaces": "2f4316de49999235636386fe51dc06c1",
-          "originId": "2f4316de49999235636386fe51dc06c1",
-          "references": "7997cf5a56cc02bdc9c93361bde732b0",
-          "task": "235412e52d09e7165fac8a67a43ad6b4",
-          "type": "2f4316de49999235636386fe51dc06c1",
-          "updated_at": "00da57df13e94e9d98437d13ace4bfe0"
-        }
-      },
-      "dynamic": "strict",
-      "properties": {
-        "migrationVersion": {
-          "dynamic": "true",
-          "properties": {
-            "task": {
-              "fields": {
-                "keyword": {
-                  "ignore_above": 256,
-                  "type": "keyword"
-                }
-              },
-              "type": "text"
-            }
-          }
-        },
-        "references": {
-          "properties": {
-            "id": {
-              "type": "keyword"
-            },
-            "name": {
-              "type": "keyword"
-            },
-            "type": {
-              "type": "keyword"
-            }
-          },
-          "type": "nested"
-        },
-        "task": {
-          "properties": {
-            "taskType": {
-              "type": "keyword"
-            },
-            "scheduledAt": {
-              "type": "date"
-            },
-            "runAt": {
-              "type": "date"
-            },
-            "startedAt": {
-              "type": "date"
-            },
-            "retryAt": {
-              "type": "date"
-            },
-            "enabled": {
-              "type": "boolean"
-            },
-            "schedule": {
-              "properties": {
-                "interval": {
-                  "type": "keyword"
-                }
-              }
-            },
-            "attempts": {
-              "type": "integer"
-            },
-            "status": {
-              "type": "keyword"
-            },
-            "traceparent": {
-              "type": "text"
-            },
-            "params": {
-              "type": "text"
-            },
-            "state": {
-              "type": "text"
-            },
-            "user": {
-              "type": "keyword"
-            },
-            "scope": {
-              "type": "keyword"
-            },
-            "ownerId": {
-              "type": "keyword"
-            }
-          }
-        },
-        "type": {
-          "type": "keyword"
-        },
-        "updated_at": {
-          "type": "date"
-        }
-      }
-    },
-    "settings": {
-      "index": {
-        "auto_expand_replicas": "0-1",
-        "number_of_replicas": "0",
-        "number_of_shards": "1"
-      }
-    }
-  }
-}
diff --git a/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_scheduled_at.ts b/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_scheduled_at.ts
index 1a393b126dfda..a70225035d03c 100644
--- a/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_scheduled_at.ts
+++ b/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_scheduled_at.ts
@@ -14,8 +14,7 @@ export default function createTaskManagementScheduledAtTests({ getService }: Ftr
   const esArchiver = getService('esArchiver');
   const retry = getService('retry');
 
-  // FLAKY: https://github.com/elastic/kibana/issues/198664
-  describe.skip('task management scheduled at', () => {
+  describe('task management scheduled at', () => {
     before(async () => {
       await esArchiver.load('x-pack/test/functional/es_archives/task_manager_tasks');
     });