diff --git a/packages/components/src/spacer/hook.ts b/packages/components/src/spacer/hook.ts
index 82d36baa5e202f..3ef4b21e104c74 100644
--- a/packages/components/src/spacer/hook.ts
+++ b/packages/components/src/spacer/hook.ts
@@ -12,8 +12,9 @@ import { space } from '../utils/space';
 import { rtl, useCx } from '../utils';
 import type { SpacerProps } from './types';
 
-const isDefined = < T >( o: T ): o is Exclude< T, null | undefined > =>
-	typeof o !== 'undefined' && o !== null;
+function isDefined< T >( o: T ): o is Exclude< T, null | undefined > {
+	return typeof o !== 'undefined' && o !== null;
+}
 
 export function useSpacer(
 	props: WordPressComponentProps< SpacerProps, 'div' >
diff --git a/packages/data-controls/src/index.ts b/packages/data-controls/src/index.ts
index 9edc6502ef881f..c0898d214224f5 100644
--- a/packages/data-controls/src/index.ts
+++ b/packages/data-controls/src/index.ts
@@ -154,7 +154,9 @@ export const __unstableAwaitPromise = function < T >( promise: Promise< T > ) {
  * store.
  */
 export const controls = {
-	AWAIT_PROMISE: < T >( { promise }: { promise: Promise< T > } ) => promise,
+	AWAIT_PROMISE< T >( { promise }: { promise: Promise< T > } ) {
+		return promise;
+	},
 	API_FETCH( { request }: { request: APIFetchOptions } ) {
 		return triggerFetch( request );
 	},
diff --git a/packages/fields/src/mutation/index.ts b/packages/fields/src/mutation/index.ts
index 80e399d74e9479..89df0f769f70ed 100644
--- a/packages/fields/src/mutation/index.ts
+++ b/packages/fields/src/mutation/index.ts
@@ -10,9 +10,9 @@ import { dispatch } from '@wordpress/data';
  */
 import type { CoreDataError, Post } from '../types';
 
-const getErrorMessagesFromPromises = < T >(
+function getErrorMessagesFromPromises< T >(
 	allSettledResults: PromiseSettledResult< T >[]
-) => {
+) {
 	const errorMessages = new Set< string >();
 	// If there was at lease one failure.
 	if ( allSettledResults.length === 1 ) {
@@ -36,7 +36,7 @@ const getErrorMessagesFromPromises = < T >(
 		}
 	}
 	return errorMessages;
-};
+}
 
 export type NoticeSettings< T extends Post > = {
 	success: {