diff --git a/x-pack/test/functional/es_archives/task_manager_removed_types/data.json b/x-pack/test/functional/es_archives/task_manager_removed_types/data.json
index 3fc1a2cad2d28..29333b60b292b 100644
--- a/x-pack/test/functional/es_archives/task_manager_removed_types/data.json
+++ b/x-pack/test/functional/es_archives/task_manager_removed_types/data.json
@@ -2,11 +2,9 @@
   "type": "doc",
   "value": {
     "id": "task:ce7e1250-3322-11eb-94c1-db6995e83f6b",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.6.0"
-      },
+      "typeMigrationVersion": "7.6.0",
       "references": [
       ],
       "task": {
@@ -33,11 +31,9 @@
   "type": "doc",
   "value": {
     "id": "task:be7e1250-3322-11eb-94c1-db6995e83f6a",
-    "index": ".kibana_task_manager_1",
+    "index": ".kibana_task_manager",
     "source": {
-      "migrationVersion": {
-        "task": "7.6.0"
-      },
+      "typeMigrationVersion": "7.6.0",
       "references": [
       ],
       "task": {
diff --git a/x-pack/test/functional/es_archives/task_manager_removed_types/mappings.json b/x-pack/test/functional/es_archives/task_manager_removed_types/mappings.json
deleted file mode 100644
index f35681efb089d..0000000000000
--- a/x-pack/test/functional/es_archives/task_manager_removed_types/mappings.json
+++ /dev/null
@@ -1,224 +0,0 @@
-{
-  "type": "index",
-  "value": {
-    "aliases": {
-      ".kibana": {
-      }
-    },
-    "index": ".kibana_1",
-    "mappings": {
-      "_meta": {
-        "migrationMappingPropertyHashes": {
-          "action": "6e96ac5e648f57523879661ea72525b7",
-          "action_task_params": "a9d49f184ee89641044be0ca2950fa3a",
-          "alert": "0359d7fcc04da9878ee9aadbda38ba55",
-          "api_key_pending_invalidation": "16f515278a295f6245149ad7c5ddedb7",
-          "apm-indices": "9bb9b2bf1fa636ed8619cbab5ce6a1dd",
-          "apm-telemetry": "3d1b76c39bfb2cc8296b024d73854724",
-          "app_search_telemetry": "3d1b76c39bfb2cc8296b024d73854724",
-          "application_usage_daily": "43b8830d5d0df85a6823d290885fc9fd",
-          "application_usage_totals": "3d1b76c39bfb2cc8296b024d73854724",
-          "application_usage_transactional": "3d1b76c39bfb2cc8296b024d73854724",
-          "search-session": "721df406dbb7e35ac22e4df6c3ad2b2a",
-          "canvas-element": "7390014e1091044523666d97247392fc",
-          "canvas-workpad": "b0a1706d356228dbdcb4a17e6b9eb231",
-          "canvas-workpad-template": "ae2673f678281e2c055d764b153e9715",
-          "cases": "477f214ff61acc3af26a7b7818e380c1",
-          "cases-comments": "8a50736330e953bca91747723a319593",
-          "cases-configure": "387c5f3a3bda7e0ae0dd4e106f914a69",
-          "cases-user-actions": "32277330ec6b721abe3b846cfd939a71",
-          "config": "c63748b75f39d0c54de12d12c1ccbc20",
-          "dashboard": "40554caf09725935e2c02e02563a2d07",
-          "endpoint:user-artifact": "4a11183eee21e6fbad864f7a30b39ad0",
-          "endpoint:user-artifact-manifest": "a0d7b04ad405eed54d76e279c3727862",
-          "enterprise_search_telemetry": "3d1b76c39bfb2cc8296b024d73854724",
-          "epm-packages": "2b83397e3eaaaa8ef15e38813f3721c3",
-          "event_log_test": "bef808d4a9c27f204ffbda3359233931",
-          "exception-list": "67f055ab8c10abd7b2ebfd969b836788",
-          "exception-list-agnostic": "67f055ab8c10abd7b2ebfd969b836788",
-          "file-upload-telemetry": "0ed4d3e1983d1217a30982630897092e",
-          "fleet-agent-actions": "9511b565b1cc6441a42033db3d5de8e9",
-          "fleet-agent-events": "e20a508b6e805189356be381dbfac8db",
-          "fleet-agents": "cb661e8ede2b640c42c8e5ef99db0683",
-          "fleet-enrollment-api-keys": "a69ef7ae661dab31561d6c6f052ef2a7",
-          "graph-workspace": "cd7ba1330e6682e9cc00b78850874be1",
-          "index-pattern": "45915a1ad866812242df474eb0479052",
-          "infrastructure-ui-source": "3d1b76c39bfb2cc8296b024d73854724",
-          "ingest-agent-policies": "8b0733cce189659593659dad8db426f0",
-          "ingest-outputs": "8854f34453a47e26f86a29f8f3b80b4e",
-          "ingest-package-policies": "c91ca97b1ff700f0fc64dc6b13d65a85",
-          "ingest_manager_settings": "02a03095f0e05b7a538fa801b88a217f",
-          "inventory-view": "3d1b76c39bfb2cc8296b024d73854724",
-          "kql-telemetry": "d12a98a6f19a2d273696597547e064ee",
-          "lens": "52346cfec69ff7b47d5f0c12361a2797",
-          "lens-ui-telemetry": "509bfa5978586998e05f9e303c07a327",
-          "map": "4a05b35c3a3a58fbc72dd0202dc3487f",
-          "maps-telemetry": "5ef305b18111b77789afefbd36b66171",
-          "metrics-explorer-view": "3d1b76c39bfb2cc8296b024d73854724",
-          "migrationVersion": "4a1746014a75ade3a714e1db5763276f",
-          "ml-job": "3bb64c31915acf93fc724af137a0891b",
-          "ml-telemetry": "257fd1d4b4fdbb9cb4b8a3b27da201e9",
-          "monitoring-telemetry": "2669d5ec15e82391cf58df4294ee9c68",
-          "namespace": "2f4316de49999235636386fe51dc06c1",
-          "namespaces": "2f4316de49999235636386fe51dc06c1",
-          "originId": "2f4316de49999235636386fe51dc06c1",
-          "query": "11aaeb7f5f7fa5bb43f25e18ce26e7d9",
-          "references": "7997cf5a56cc02bdc9c93361bde732b0",
-          "sample-data-telemetry": "7d3cfeb915303c9641c59681967ffeb4",
-          "search": "43012c7ebc4cb57054e0a490e4b43023",
-          "search-telemetry": "3d1b76c39bfb2cc8296b024d73854724",
-          "siem-detection-engine-rule-actions": "6569b288c169539db10cb262bf79de18",
-          "siem-detection-engine-rule-status": "ae783f41c6937db6b7a2ef5c93a9e9b0",
-          "siem-ui-timeline": "d12c5474364d737d17252acf1dc4585c",
-          "siem-ui-timeline-note": "8874706eedc49059d4cf0f5094559084",
-          "siem-ui-timeline-pinned-event": "20638091112f0e14f0e443d512301c29",
-          "space": "c5ca8acafa0beaa4d08d014a97b6bc6b",
-          "tag": "83d55da58f6530f7055415717ec06474",
-          "telemetry": "36a616f7026dfa617d6655df850fe16d",
-          "tsvb-validation-telemetry": "3a37ef6c8700ae6fc97d5c7da00e9215",
-          "type": "2f4316de49999235636386fe51dc06c1",
-          "ui-metric": "0d409297dc5ebe1e3a1da691c6ee32e3",
-          "updated_at": "00da57df13e94e9d98437d13ace4bfe0",
-          "upgrade-assistant-reindex-operation": "215107c281839ea9b3ad5f6419819763",
-          "upgrade-assistant-telemetry": "56702cec857e0a9dacfb696655b4ff7b",
-          "uptime-dynamic-settings": "3d1b76c39bfb2cc8296b024d73854724",
-          "url": "c7f66a0df8b1b52f17c28c4adb111105",
-          "visualization": "f819cf6636b75c9e76ba733a0c6ef355",
-          "workplace_search_telemetry": "3d1b76c39bfb2cc8296b024d73854724"
-        }
-      },
-      "dynamic": "strict",
-      "properties": {
-        "type": {
-          "type": "keyword"
-        },
-        "updated_at": {
-          "type": "date"
-        }
-      }
-    },
-    "settings": {
-      "index": {
-        "auto_expand_replicas": "0-1",
-        "number_of_replicas": "0",
-        "number_of_shards": "1"
-      }
-    }
-  }
-}
-
-{
-  "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": {
-            "attempts": {
-              "type": "integer"
-            },
-            "ownerId": {
-              "type": "keyword"
-            },
-            "params": {
-              "type": "text"
-            },
-            "retryAt": {
-              "type": "date"
-            },
-            "runAt": {
-              "type": "date"
-            },
-            "schedule": {
-              "properties": {
-                "interval": {
-                  "type": "keyword"
-                }
-              }
-            },
-            "scheduledAt": {
-              "type": "date"
-            },
-            "scope": {
-              "type": "keyword"
-            },
-            "startedAt": {
-              "type": "date"
-            },
-            "state": {
-              "type": "text"
-            },
-            "status": {
-              "type": "keyword"
-            },
-            "taskType": {
-              "type": "keyword"
-            },
-            "user": {
-              "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_removed_types.ts b/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_removed_types.ts
index 60d858206d68e..a7447353e805a 100644
--- a/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_removed_types.ts
+++ b/x-pack/test/plugin_api_integration/test_suites/task_manager/task_management_removed_types.ts
@@ -47,8 +47,7 @@ export default function ({ getService }: FtrProviderContext) {
   const UNREGISTERED_TASK_TYPE_ID = 'ce7e1250-3322-11eb-94c1-db6995e83f6b';
   const REMOVED_TASK_TYPE_ID = 'be7e1250-3322-11eb-94c1-db6995e83f6a';
 
-  // FLAKY: https://github.com/elastic/kibana/issues/200154
-  describe.skip('not registered task types', () => {
+  describe('not registered task types', () => {
     before(async () => {
       await esArchiver.load('x-pack/test/functional/es_archives/task_manager_removed_types');
     });