diff --git a/src/core/server/saved_objects/migrationsv2/actions/index.test.ts b/src/core/server/saved_objects/migrationsv2/actions/index.test.ts
index 159bf6b042f8a..05da335d70884 100644
--- a/src/core/server/saved_objects/migrationsv2/actions/index.test.ts
+++ b/src/core/server/saved_objects/migrationsv2/actions/index.test.ts
@@ -37,7 +37,7 @@ describe('actions', () => {
 
   describe('fetchIndices', () => {
     it('calls catchRetryableEsClientErrors when the promise rejects', async () => {
-      const task = Actions.fetchIndices({ client, indicesToFetch: ['my_index'] });
+      const task = Actions.fetchIndices({ client, indices: ['my_index'] });
       try {
         await task();
       } catch (e) {
diff --git a/src/core/server/saved_objects/migrationsv2/actions/index.ts b/src/core/server/saved_objects/migrationsv2/actions/index.ts
index a6f61a521b7ac..905d64947298e 100644
--- a/src/core/server/saved_objects/migrationsv2/actions/index.ts
+++ b/src/core/server/saved_objects/migrationsv2/actions/index.ts
@@ -71,7 +71,7 @@ export type FetchIndexResponse = Record<
 /** @internal */
 export interface FetchIndicesParams {
   client: ElasticsearchClient;
-  indicesToFetch: string[];
+  indices: string[];
 }
 
 /**
@@ -80,14 +80,14 @@ export interface FetchIndicesParams {
  */
 export const fetchIndices = ({
   client,
-  indicesToFetch,
+  indices,
 }: FetchIndicesParams): TaskEither.TaskEither<RetryableEsClientError, FetchIndexResponse> =>
   // @ts-expect-error @elastic/elasticsearch IndexState.alias and IndexState.mappings should be required
   () => {
     return client.indices
       .get(
         {
-          index: indicesToFetch,
+          index: indices,
           ignore_unavailable: true, // Don't return an error for missing indices. Note this *will* include closed indices, the docs are misleading https://github.com/elastic/elasticsearch/issues/63607
         },
         { ignore: [404], maxRetries: 0 }
@@ -1174,7 +1174,7 @@ export interface BulkOverwriteTransformedDocumentsParams {
   client: ElasticsearchClient;
   index: string;
   transformedDocs: SavedObjectsRawDoc[];
-  refresh: estypes.Refresh;
+  refresh?: estypes.Refresh;
 }
 /**
  * Write the up-to-date transformed documents to the index, overwriting any
@@ -1184,7 +1184,7 @@ export const bulkOverwriteTransformedDocuments = ({
   client,
   index,
   transformedDocs,
-  refresh,
+  refresh = false,
 }: BulkOverwriteTransformedDocumentsParams): TaskEither.TaskEither<
   RetryableEsClientError,
   'bulk_index_succeeded'
diff --git a/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts b/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts
index b348eb69c4c16..67a2685caf3d6 100644
--- a/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts
+++ b/src/core/server/saved_objects/migrationsv2/integration_tests/actions.test.ts
@@ -116,7 +116,7 @@ describe('migration actions', () => {
   describe('fetchIndices', () => {
     it('resolves right empty record if no indices were found', async () => {
       expect.assertions(1);
-      const task = fetchIndices({ client, indicesToFetch: ['no_such_index'] });
+      const task = fetchIndices({ client, indices: ['no_such_index'] });
       await expect(task()).resolves.toMatchInlineSnapshot(`
                 Object {
                   "_tag": "Right",
@@ -128,7 +128,7 @@ describe('migration actions', () => {
       expect.assertions(1);
       const res = (await fetchIndices({
         client,
-        indicesToFetch: ['no_such_index', 'existing_index_with_docs'],
+        indices: ['no_such_index', 'existing_index_with_docs'],
       })()) as Either.Right<unknown>;
 
       expect(res.right).toEqual(
diff --git a/src/core/server/saved_objects/migrationsv2/next.ts b/src/core/server/saved_objects/migrationsv2/next.ts
index e43223688d4bc..3c3e3c46a8d68 100644
--- a/src/core/server/saved_objects/migrationsv2/next.ts
+++ b/src/core/server/saved_objects/migrationsv2/next.ts
@@ -58,7 +58,7 @@ export type ResponseType<ControlState extends AllActionStates> = UnwrapPromise<
 export const nextActionMap = (client: ElasticsearchClient, transformRawDocs: TransformRawDocs) => {
   return {
     INIT: (state: InitState) =>
-      Actions.fetchIndices({ client, indicesToFetch: [state.currentAlias, state.versionAlias] }),
+      Actions.fetchIndices({ client, indices: [state.currentAlias, state.versionAlias] }),
     WAIT_FOR_YELLOW_SOURCE: (state: WaitForYellowSourceState) =>
       Actions.waitForIndexStatusYellow({ client, index: state.sourceIndex.value }),
     SET_SOURCE_WRITE_BLOCK: (state: SetSourceWriteBlockState) =>
@@ -154,12 +154,11 @@ export const nextActionMap = (client: ElasticsearchClient, transformRawDocs: Tra
          * before we reach out to the MARK_VERSION_INDEX_READY step.
          * Right now, it's performed during OUTDATED_DOCUMENTS_REFRESH step.
          */
-        refresh: false,
       }),
     MARK_VERSION_INDEX_READY: (state: MarkVersionIndexReady) =>
       Actions.updateAliases({ client, aliasActions: state.versionIndexReadyActions.value }),
     MARK_VERSION_INDEX_READY_CONFLICT: (state: MarkVersionIndexReadyConflict) =>
-      Actions.fetchIndices({ client, indicesToFetch: [state.currentAlias, state.versionAlias] }),
+      Actions.fetchIndices({ client, indices: [state.currentAlias, state.versionAlias] }),
     LEGACY_SET_WRITE_BLOCK: (state: LegacySetWriteBlockState) =>
       Actions.setWriteBlock({ client, index: state.legacyIndex }),
     LEGACY_CREATE_REINDEX_TARGET: (state: LegacyCreateReindexTargetState) =>