diff --git a/core-data/index.js b/core-data/index.js
index 0e651c8cb6b71..cdcc7b5bae068 100644
--- a/core-data/index.js
+++ b/core-data/index.js
@@ -16,17 +16,17 @@ const MODULE_KEY = 'core';
 
 const store = registerStore( MODULE_KEY, {
 	reducer,
-	selectors: { getCategories },
+	selectors: {
+		getCategories,
+	},
 	resolvers: {
-		getCategories: {
-			fulfill() {
-				wp.apiRequest( { path: '/wp/v2/categories' } ).then( categories => {
-					store.dispatch( {
-						type: 'RECEIVE_CATEGORIES',
-						categories,
-					} );
+		getCategories() {
+			wp.apiRequest( { path: '/wp/v2/categories' } ).then( ( categories ) => {
+				store.dispatch( {
+					type: 'RECEIVE_CATEGORIES',
+					categories,
 				} );
-			},
+			} );
 		},
 	},
 } );
diff --git a/data/index.js b/data/index.js
index b653654ff2f35..04c6c9855874f 100644
--- a/data/index.js
+++ b/data/index.js
@@ -3,7 +3,7 @@
  */
 import isEqualShallow from 'is-equal-shallow';
 import { createStore } from 'redux';
-import { flowRight, without, mapValues, get } from 'lodash';
+import { flowRight, without, mapValues } from 'lodash';
 import memize from 'memize';
 
 /**
@@ -119,13 +119,12 @@ export function registerSelectors( reducerKey, newSelectors ) {
 export function registerResolvers( reducerKey, newResolvers ) {
 	const createResolver = ( selector, key ) => {
 		// Don't modify selector behavior if no resolver exists.
-		let fulfill = get( newResolvers, [ key, 'fulfill' ] );
-		if ( typeof fulfill !== 'function' ) {
+		if ( ! newResolvers.hasOwnProperty( key ) ) {
 			return selector;
 		}
 
 		// Ensure single invocation per argument set via memoization.
-		fulfill = memize( fulfill );
+		const fulfill = memize( newResolvers[ key ] );
 
 		return ( ...args ) => {
 			fulfill( ...args );
diff --git a/data/test/index.js b/data/test/index.js
index 31721d3d65c9e..933ed5fdd630f 100644
--- a/data/test/index.js
+++ b/data/test/index.js
@@ -88,18 +88,6 @@ describe( 'registerResolvers', () => {
 		expect( select( 'demo' ).getValue() ).toBe( 'OK' );
 	} );
 
-	it( 'should not do anything if registered without fulfill', () => {
-		registerReducer( 'demo', ( state = 'OK' ) => state );
-		registerSelectors( 'demo', {
-			getValue: ( state ) => state,
-		} );
-		registerResolvers( 'demo', {
-			getValue: {},
-		} );
-
-		expect( select( 'demo' ).getValue() ).toBe( 'OK' );
-	} );
-
 	it( 'should behave as a side effect for the given selector, with arguments', () => {
 		const resolver = jest.fn();
 
@@ -108,9 +96,7 @@ describe( 'registerResolvers', () => {
 			getValue: ( state ) => state,
 		} );
 		registerResolvers( 'demo', {
-			getValue: {
-				fulfill: resolver,
-			},
+			getValue: resolver,
 		} );
 
 		const value = select( 'demo' ).getValue( 'arg1', 'arg2' );