diff --git a/jest.setup.js b/jest.setup.js
index de4a3788..f7cfa62f 100644
--- a/jest.setup.js
+++ b/jest.setup.js
@@ -2,3 +2,4 @@
 // @ts-nocheck
 var mockMediaWiki = require( '@wikimedia/mw-node-qunit/src/mockMediaWiki.js' );
 global.mw = mockMediaWiki();
+global.$ = require('jquery');
diff --git a/jsdoc.json b/jsdoc.json
index 9bed76b2..9a67c1ee 100644
--- a/jsdoc.json
+++ b/jsdoc.json
@@ -19,6 +19,7 @@
 			"linkMap": {
 				"\"addEventListener\"": "https://developer.mozilla.org/docs/Web/API/EventTarget/addEventListener",
 				"jQuery": "https://api.jquery.com",
+				"AbortSignal": "https://developer.mozilla.org/en-US/docs/Web/API/AbortSignal",
 				"Document": "https://developer.mozilla.org/docs/Web/API/Document",
 				"Element": "https://developer.mozilla.org/docs/Web/API/Element",
 				"Event": "https://developer.mozilla.org/docs/Web/API/Event",
@@ -31,11 +32,11 @@
 				"HTMLInputElement": "https://developer.mozilla.org/docs/Web/API/HTMLInputElement",
 				"\"removeEventListener\"": "https://developer.mozilla.org/docs/Web/API/EventTarget/removeEventListener",
 				"Window": "https://developer.mozilla.org/docs/Web/API/Window",
-
 				"CheckboxHack": "https://doc.wikimedia.org/mediawiki-core/master/js",
-
-				"MW": "https://doc.wikimedia.org/mediawiki-core/master/js/#!/api/mw",
 				"MediaWikiPageReadyModule": "https://doc.wikimedia.org/mediawiki-core/master/js/#!/api/mw.plugin.page.ready",
+				"MW": "https://doc.wikimedia.org/mediawiki-core/master/js/#!/api/mw",
+				"MwMap": "https://doc.wikimedia.org/mediawiki-core/master/js/#!/api/mw.Map",
+				"RequestInit": "https://developer.mozilla.org/en-US/docs/Web/API/Request/Request",
 				"JQueryStatic": "https://api.jquery.com",
 				"VectorResourceLoaderVirtualConfig": "#",
 				"void": "#",
diff --git a/package-lock.json b/package-lock.json
index ee7b6178..c3785069 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,8 +19,9 @@
 				"eslint-config-wikimedia": "0.20.0",
 				"grunt-banana-checker": "0.9.0",
 				"jest": "26.4.2",
+				"jest-fetch-mock": "3.0.3",
 				"jsdoc": "3.6.7",
-				"jsdoc-wmf-theme": "0.0.3",
+				"jsdoc-wmf-theme": "0.0.5",
 				"less": "3.8.1",
 				"less-loader": "4.1.0",
 				"mustache": "3.0.1",
@@ -7607,6 +7608,57 @@
 				"react": "^0.14.0 || ^15.0.0 || ^16.0.0"
 			}
 		},
+		"node_modules/cross-fetch": {
+			"version": "3.1.5",
+			"resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.1.5.tgz",
+			"integrity": "sha512-lvb1SBsI0Z7GDwmuid+mU3kWVBwTVUbe7S0H52yaaAdQOXq2YktTCZdlAcNKFzE6QtRz0snpw9bNiPeOIkkQvw==",
+			"dev": true,
+			"dependencies": {
+				"node-fetch": "2.6.7"
+			}
+		},
+		"node_modules/cross-fetch/node_modules/node-fetch": {
+			"version": "2.6.7",
+			"resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
+			"integrity": "sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==",
+			"dev": true,
+			"dependencies": {
+				"whatwg-url": "^5.0.0"
+			},
+			"engines": {
+				"node": "4.x || >=6.0.0"
+			},
+			"peerDependencies": {
+				"encoding": "^0.1.0"
+			},
+			"peerDependenciesMeta": {
+				"encoding": {
+					"optional": true
+				}
+			}
+		},
+		"node_modules/cross-fetch/node_modules/tr46": {
+			"version": "0.0.3",
+			"resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+			"integrity": "sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=",
+			"dev": true
+		},
+		"node_modules/cross-fetch/node_modules/webidl-conversions": {
+			"version": "3.0.1",
+			"resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+			"integrity": "sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=",
+			"dev": true
+		},
+		"node_modules/cross-fetch/node_modules/whatwg-url": {
+			"version": "5.0.0",
+			"resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+			"integrity": "sha1-lmRU6HZUYuN2RNNib2dCzotwll0=",
+			"dev": true,
+			"dependencies": {
+				"tr46": "~0.0.3",
+				"webidl-conversions": "^3.0.0"
+			}
+		},
 		"node_modules/cross-spawn": {
 			"version": "5.1.0",
 			"resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
@@ -14172,6 +14224,16 @@
 				"node": ">= 10.14.2"
 			}
 		},
+		"node_modules/jest-fetch-mock": {
+			"version": "3.0.3",
+			"resolved": "https://registry.npmjs.org/jest-fetch-mock/-/jest-fetch-mock-3.0.3.tgz",
+			"integrity": "sha512-Ux1nWprtLrdrH4XwE7O7InRY6psIi3GOsqNESJgMJ+M5cv4A8Lh7SN9d2V2kKRZ8ebAfcd1LNyZguAOb6JiDqw==",
+			"dev": true,
+			"dependencies": {
+				"cross-fetch": "^3.0.4",
+				"promise-polyfill": "^8.1.3"
+			}
+		},
 		"node_modules/jest-get-type": {
 			"version": "26.3.0",
 			"resolved": "https://registry.npmjs.org/jest-get-type/-/jest-get-type-26.3.0.tgz",
@@ -15793,9 +15855,9 @@
 			}
 		},
 		"node_modules/jsdoc-wmf-theme": {
-			"version": "0.0.3",
-			"resolved": "https://registry.npmjs.org/jsdoc-wmf-theme/-/jsdoc-wmf-theme-0.0.3.tgz",
-			"integrity": "sha512-jpszk0hcjY7bD1sCd8JrBdtcoudG0h9FbJTjdq8WOSEtUBNWgtIc7s1ccDoYnK/bp4OEuA7xH0xtpqe0SVutsw==",
+			"version": "0.0.5",
+			"resolved": "https://registry.npmjs.org/jsdoc-wmf-theme/-/jsdoc-wmf-theme-0.0.5.tgz",
+			"integrity": "sha512-YRVucO3yiKF6a54oIR+gQLDynO60o2m0lOiCBCws0vIORJOn9T++tGJrOCVy5TSaSAmJTX1cnTbUCH7L+c1JCw==",
 			"dev": true,
 			"dependencies": {
 				"domino": "^2.0.1",
@@ -18861,6 +18923,12 @@
 			"integrity": "sha1-mEcocL8igTL8vdhoEputEsPAKeM=",
 			"dev": true
 		},
+		"node_modules/promise-polyfill": {
+			"version": "8.2.1",
+			"resolved": "https://registry.npmjs.org/promise-polyfill/-/promise-polyfill-8.2.1.tgz",
+			"integrity": "sha512-3p9zj0cEHbp7NVUxEYUWjQlffXqnXaZIMPkAO7HhFh8u5636xLRDHOUo2vpWSK0T2mqm6fKLXYn1KP6PAZ2gKg==",
+			"dev": true
+		},
 		"node_modules/promise.allsettled": {
 			"version": "1.0.4",
 			"resolved": "https://registry.npmjs.org/promise.allsettled/-/promise.allsettled-1.0.4.tgz",
@@ -30772,6 +30840,48 @@
 				"warning": "^4.0.3"
 			}
 		},
+		"cross-fetch": {
+			"version": "3.1.5",
+			"resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.1.5.tgz",
+			"integrity": "sha512-lvb1SBsI0Z7GDwmuid+mU3kWVBwTVUbe7S0H52yaaAdQOXq2YktTCZdlAcNKFzE6QtRz0snpw9bNiPeOIkkQvw==",
+			"dev": true,
+			"requires": {
+				"node-fetch": "2.6.7"
+			},
+			"dependencies": {
+				"node-fetch": {
+					"version": "2.6.7",
+					"resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
+					"integrity": "sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==",
+					"dev": true,
+					"requires": {
+						"whatwg-url": "^5.0.0"
+					}
+				},
+				"tr46": {
+					"version": "0.0.3",
+					"resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+					"integrity": "sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=",
+					"dev": true
+				},
+				"webidl-conversions": {
+					"version": "3.0.1",
+					"resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+					"integrity": "sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=",
+					"dev": true
+				},
+				"whatwg-url": {
+					"version": "5.0.0",
+					"resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+					"integrity": "sha1-lmRU6HZUYuN2RNNib2dCzotwll0=",
+					"dev": true,
+					"requires": {
+						"tr46": "~0.0.3",
+						"webidl-conversions": "^3.0.0"
+					}
+				}
+			}
+		},
 		"cross-spawn": {
 			"version": "5.1.0",
 			"resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
@@ -35892,6 +36002,16 @@
 				"jest-util": "^26.6.2"
 			}
 		},
+		"jest-fetch-mock": {
+			"version": "3.0.3",
+			"resolved": "https://registry.npmjs.org/jest-fetch-mock/-/jest-fetch-mock-3.0.3.tgz",
+			"integrity": "sha512-Ux1nWprtLrdrH4XwE7O7InRY6psIi3GOsqNESJgMJ+M5cv4A8Lh7SN9d2V2kKRZ8ebAfcd1LNyZguAOb6JiDqw==",
+			"dev": true,
+			"requires": {
+				"cross-fetch": "^3.0.4",
+				"promise-polyfill": "^8.1.3"
+			}
+		},
 		"jest-get-type": {
 			"version": "26.3.0",
 			"resolved": "https://registry.npmjs.org/jest-get-type/-/jest-get-type-26.3.0.tgz",
@@ -37144,9 +37264,9 @@
 			"dev": true
 		},
 		"jsdoc-wmf-theme": {
-			"version": "0.0.3",
-			"resolved": "https://registry.npmjs.org/jsdoc-wmf-theme/-/jsdoc-wmf-theme-0.0.3.tgz",
-			"integrity": "sha512-jpszk0hcjY7bD1sCd8JrBdtcoudG0h9FbJTjdq8WOSEtUBNWgtIc7s1ccDoYnK/bp4OEuA7xH0xtpqe0SVutsw==",
+			"version": "0.0.5",
+			"resolved": "https://registry.npmjs.org/jsdoc-wmf-theme/-/jsdoc-wmf-theme-0.0.5.tgz",
+			"integrity": "sha512-YRVucO3yiKF6a54oIR+gQLDynO60o2m0lOiCBCws0vIORJOn9T++tGJrOCVy5TSaSAmJTX1cnTbUCH7L+c1JCw==",
 			"dev": true,
 			"requires": {
 				"domino": "^2.0.1",
@@ -39569,6 +39689,12 @@
 			"integrity": "sha1-mEcocL8igTL8vdhoEputEsPAKeM=",
 			"dev": true
 		},
+		"promise-polyfill": {
+			"version": "8.2.1",
+			"resolved": "https://registry.npmjs.org/promise-polyfill/-/promise-polyfill-8.2.1.tgz",
+			"integrity": "sha512-3p9zj0cEHbp7NVUxEYUWjQlffXqnXaZIMPkAO7HhFh8u5636xLRDHOUo2vpWSK0T2mqm6fKLXYn1KP6PAZ2gKg==",
+			"dev": true
+		},
 		"promise.allsettled": {
 			"version": "1.0.4",
 			"resolved": "https://registry.npmjs.org/promise.allsettled/-/promise.allsettled-1.0.4.tgz",
diff --git a/package.json b/package.json
index 2015abd3..5c03ea5e 100644
--- a/package.json
+++ b/package.json
@@ -31,8 +31,9 @@
 		"eslint-config-wikimedia": "0.20.0",
 		"grunt-banana-checker": "0.9.0",
 		"jest": "26.4.2",
+		"jest-fetch-mock": "3.0.3",
 		"jsdoc": "3.6.7",
-		"jsdoc-wmf-theme": "0.0.3",
+		"jsdoc-wmf-theme": "0.0.5",
 		"less": "3.8.1",
 		"less-loader": "4.1.0",
 		"mustache": "3.0.1",
diff --git a/resources/skins.vector.search/.eslintrc.json b/resources/skins.vector.search/.eslintrc.json
index f7eaa245..915524cc 100644
--- a/resources/skins.vector.search/.eslintrc.json
+++ b/resources/skins.vector.search/.eslintrc.json
@@ -1,5 +1,16 @@
 {
 	"extends": [
 		"../../.eslintrcEs6.json"
-	]
+	],
+	"rules": {
+		"jsdoc/no-undefined-types": [
+			"error",
+			{
+				"definedTypes": [
+					"RequestInit",
+					"MwMap"
+				]
+			}
+		]
+	}
 }
diff --git a/resources/skins.vector.search/App.vue b/resources/skins.vector.search/App.vue
index 93ffe5ff..421441d3 100644
--- a/resources/skins.vector.search/App.vue
+++ b/resources/skins.vector.search/App.vue
@@ -42,6 +42,7 @@
 <script>
 /* global SubmitEvent */
 const wvui = require( 'wvui-search' ),
+	client = require( './restSearchClient.js' ),
 	instrumentation = require( './instrumentation.js' );
 
 module.exports = {
@@ -62,10 +63,10 @@ module.exports = {
 		/**
 		 * Allow wikis eg. Hebrew Wikipedia to replace the default search API client
 		 *
-		 * @return {void|Object}
+		 * @return {module:restSearchClient~SearchClient}
 		 */
 		getClient: () => {
-			return mw.config.get( 'wgVectorSearchClient', undefined );
+			return client( mw.config );
 		},
 		language: () => {
 			return mw.config.get( 'wgUserLanguage' );
diff --git a/resources/skins.vector.search/restSearchClient.js b/resources/skins.vector.search/restSearchClient.js
new file mode 100644
index 00000000..0b88e965
--- /dev/null
+++ b/resources/skins.vector.search/restSearchClient.js
@@ -0,0 +1,184 @@
+/** @module restSearchClient */
+
+/**
+ * @typedef {Object} AbortableFetch
+ * @property {Promise<any>} fetch
+ * @property {Function} abort
+ */
+
+/**
+ * @typedef {Object} NullableAbortController
+ * @property {AbortSignal | undefined} signal
+ * @property {Function} abort
+ */
+const nullAbortController = {
+	signal: undefined,
+	abort: () => {} // Do nothing (no-op)
+};
+
+/**
+ * A wrapper which combines native fetch() in browsers and the following json() call.
+ *
+ * @param {string} resource
+ * @param {RequestInit} [init]
+ * @return {AbortableFetch}
+ */
+function fetchJson( resource, init ) {
+	// As of 2020, browser support for AbortController is limited:
+	// https://caniuse.com/abortcontroller
+	// so replacing it with no-op if it doesn't exist.
+	/* eslint-disable compat/compat */
+	const controller = window.AbortController ?
+		new AbortController() :
+		nullAbortController;
+	/* eslint-enable compat/compat */
+
+	const getJson = fetch( resource, $.extend( init, {
+		signal: controller.signal
+	} ) ).then( ( response ) => {
+		if ( !response.ok ) {
+			return Promise.reject(
+				'Network request failed with HTTP code ' + response.status
+			);
+		}
+		return response.json();
+	} );
+
+	return {
+		fetch: getJson,
+		abort: () => {
+			controller.abort();
+		}
+	};
+}
+
+/**
+ * @typedef {Object} RestResponse
+ * @property {RestResult[]} pages
+ */
+
+/**
+ * @typedef {Object} RestResult
+ * @property {number} id
+ * @property {string} key
+ * @property {string} title
+ * @property {string} [description]
+ * @property {RestThumbnail | null} [thumbnail]
+ *
+ */
+
+/**
+ * @typedef {Object} RestThumbnail
+ * @property {string} url
+ * @property {number | null} [width]
+ * @property {number | null} [height]
+ */
+
+/**
+ * @typedef {Object} SearchResponse
+ * @property {string} query
+ * @property {SearchResult[]} results
+ */
+
+/**
+ * @typedef {Object} SearchResult
+ * @property {number} id
+ * @property {string} key
+ * @property {string} title
+ * @property {string} [description]
+ * @property {SearchResultThumbnail} [thumbnail]
+ */
+
+/**
+ * @typedef {Object} SearchResultThumbnail
+ * @property {string} url
+ * @property {number} [width]
+ * @property {number} [height]
+ */
+
+/**
+ * Nullish coalescing operator (??) helper
+ *
+ * @param {any} a
+ * @param {any} b
+ * @return {any}
+ */
+function nullish( a, b ) {
+	return ( a !== null && a !== undefined ) ? a : b;
+}
+
+/**
+ * @param {string} query
+ * @param {RestResponse} restResponse
+ * @return {SearchResponse}
+ */
+function adaptApiResponse( query, restResponse ) {
+	return {
+		query,
+		results: restResponse.pages.map( ( page ) => {
+			const thumbnail = page.thumbnail;
+			return {
+				id: page.id,
+				key: page.key,
+				title: page.title,
+				description: page.description,
+				thumbnail: thumbnail ? {
+					url: thumbnail.url,
+					width: nullish( thumbnail.width, undefined ),
+					height: nullish( thumbnail.height, undefined )
+				} : undefined
+			};
+		} )
+	};
+}
+
+/**
+ * @typedef {Object} AbortableSearchFetch
+ * @property {Promise<SearchResponse>} fetch
+ * @property {Function} abort
+ */
+
+/**
+ * @callback fetchByTitle
+ * @param {string} query The search term.
+ * @param {string} domain The base URL for the wiki without protocol. Example: 'sr.wikipedia.org'.
+ * @param {number} [limit] Maximum number of results.
+ * @return {AbortableSearchFetch}
+ */
+
+/**
+ * @typedef {Object} SearchClient
+ * @property {fetchByTitle} fetchByTitle
+ */
+
+/**
+ * @param {MwMap} config
+ * @return {SearchClient}
+ */
+function restSearchClient( config ) {
+	const customClient = config.get( 'wgVectorSearchClient' );
+	return customClient || {
+		/**
+		 * @type {fetchByTitle}
+		 */
+		fetchByTitle: ( q, domain, limit = 10 ) => {
+			const params = { q, limit };
+			const url = '//' + domain + config.get( 'wgScriptPath' ) + '/rest.php/v1/search/title?' + $.param( params );
+			const result = fetchJson( url, {
+				headers: {
+					accept: 'application/json'
+				}
+			} );
+			const searchResponsePromise = result.fetch
+				.then( ( /** @type {RestResponse} */ res ) => {
+					return adaptApiResponse( q, res );
+				} );
+			return {
+				abort: result.abort,
+				fetch: searchResponsePromise
+			};
+		}
+	};
+}
+
+module.exports = restSearchClient;
diff --git a/skin.json b/skin.json
index 922733a2..9e478651 100644
--- a/skin.json
+++ b/skin.json
@@ -145,6 +145,7 @@
 			"packageFiles": [
 				"resources/skins.vector.search/skins.vector.search.js",
 				"resources/skins.vector.search/instrumentation.js",
+				"resources/skins.vector.search/restSearchClient.js",
 				"resources/skins.vector.search/App.vue",
 				{
 					"name": "resources/skins.vector.search/config.json",
diff --git a/tests/jest/restSearchClient.test.js b/tests/jest/restSearchClient.test.js
new file mode 100644
index 00000000..a378db2f
--- /dev/null
+++ b/tests/jest/restSearchClient.test.js
@@ -0,0 +1,121 @@
+/* global fetchMock */
+const restSearchClient = require( '../../resources/skins.vector.search/restSearchClient.js' );
+const jestFetchMock = require( 'jest-fetch-mock' );
+
+const mockedRequests = !process.env.TEST_LIVE_REQUESTS;
+const configMock = {
+	get: jest.fn().mockImplementation( key => {
+		if ( key === 'wgScriptPath' ) {
+			return '/w';
+		}
+		return null;
+	} ),
+	set: jest.fn()
+};
+
+describe( 'restApiSearchClient', () => {
+	beforeAll( () => {
+		jestFetchMock.enableFetchMocks();
+	} );
+
+	afterAll( () => {
+		jestFetchMock.disableFetchMocks();
+	} );
+
+	beforeEach( () => {
+		fetchMock.resetMocks();
+		if ( !mockedRequests ) {
+			fetchMock.disableMocks();
+		}
+	} );
+
+	test( '2 results', async () => {
+		const thumbUrl = '//upload.wikimedia.org/wikipedia/commons/0/01/MediaWiki-smaller-logo.png';
+		const restResponse = {
+			pages: [
+				{
+					id: 37298,
+					key: 'Media',
+					title: 'Media',
+					description: 'Wikimedia disambiguation page',
+					thumbnail: null
+				},
+				{
+					id: 323710,
+					key: 'MediaWiki',
+					title: 'MediaWiki',
+					description: 'wiki software',
+					thumbnail: {
+						width: 200,
+						height: 189,
+						url: thumbUrl
+					}
+				}
+			]
+		};
+		fetchMock.mockOnce( JSON.stringify( restResponse ) );
+
+		const searchResult = await restSearchClient( configMock ).fetchByTitle(
+			'media',
+			'en.wikipedia.org',
+			2
+		).fetch;
+
+		/* eslint-disable-next-line compat/compat */
+		const controller = new AbortController();
+
+		expect( searchResult.query ).toStrictEqual( 'media' );
+		expect( searchResult.results ).toBeTruthy();
+		expect( searchResult.results.length ).toBe( 2 );
+
+		expect( searchResult.results[ 0 ] ).toStrictEqual(
+			Object.assign( {}, restResponse.pages[ 0 ], {
+				// thumbnail: null -> thumbnail: undefined
+				thumbnail: undefined
+			} ) );
+		expect( searchResult.results[ 1 ] ).toStrictEqual( restResponse.pages[ 1 ] );
+
+		if ( mockedRequests ) {
+			expect( fetchMock ).toHaveBeenCalledTimes( 1 );
+			expect( fetchMock ).toHaveBeenCalledWith(
+				'//en.wikipedia.org/w/rest.php/v1/search/title?q=media&limit=2',
+				{ headers: { accept: 'application/json' }, signal: controller.signal }
+			);
+		}
+	} );
+
+	test( '0 results', async () => {
+		const restResponse = { pages: [] };
+		fetchMock.mockOnce( JSON.stringify( restResponse ) );
+
+		const searchResult = await restSearchClient( configMock ).fetchByTitle(
+			'thereIsNothingLikeThis',
+			'en.wikipedia.org'
+		).fetch;
+
+		/* eslint-disable-next-line compat/compat */
+		const controller = new AbortController();
+		expect( searchResult.query ).toStrictEqual( 'thereIsNothingLikeThis' );
+		expect( searchResult.results ).toBeTruthy();
+		expect( searchResult.results.length ).toBe( 0 );
+
+		if ( mockedRequests ) {
+			expect( fetchMock ).toHaveBeenCalledTimes( 1 );
+			expect( fetchMock ).toHaveBeenCalledWith(
+				'//en.wikipedia.org/w/rest.php/v1/search/title?q=thereIsNothingLikeThis&limit=10',
+				{ headers: { accept: 'application/json' }, signal: controller.signal }
+			);
+		}
+	} );
+
+	if ( mockedRequests ) {
+		test( 'network error', async () => {
+			fetchMock.mockRejectOnce( new Error( 'failed' ) );
+
+			await expect( restSearchClient( configMock ).fetchByTitle(
+				'anything',
+				'en.wikipedia.org'
+			).fetch ).rejects.toThrow( 'failed' );
+		} );
+	}
+} );