diff --git a/types/rdfjs__fetch/index.d.ts b/types/rdfjs__fetch/index.d.ts
index 67dfc755a2..8d20ac40db 100644
--- a/types/rdfjs__fetch/index.d.ts
+++ b/types/rdfjs__fetch/index.d.ts
@@ -6,9 +6,9 @@
 import { FormatsInit, RdfFetchResponse, FactoryInit, DatasetResponse } from '@rdfjs/fetch-lite';
 import { DatasetCore, Quad, BaseQuad } from 'rdf-js';
 
-declare function rdfFetch(url: string, options: FormatsInit): Promise<RdfFetchResponse>;
+declare function rdfFetch(url: string, options?: Partial<FormatsInit>): Promise<RdfFetchResponse>;
 declare function rdfFetch <D extends DatasetCore<OutQuad, InQuad>, OutQuad extends BaseQuad = Quad, InQuad extends BaseQuad = OutQuad>(
     url: string,
-    options: FactoryInit<D, OutQuad, InQuad>): Promise<DatasetResponse<D, OutQuad, InQuad>>;
+    options?: Partial<FactoryInit<D, OutQuad, InQuad>>): Promise<DatasetResponse<D, OutQuad, InQuad>>;
 
 export = rdfFetch;
diff --git a/types/rdfjs__fetch/rdfjs__fetch-tests.ts b/types/rdfjs__fetch/rdfjs__fetch-tests.ts
index 2e8b876bf6..e2774ca956 100644
--- a/types/rdfjs__fetch/rdfjs__fetch-tests.ts
+++ b/types/rdfjs__fetch/rdfjs__fetch-tests.ts
@@ -2,11 +2,20 @@ import fetch = require('@rdfjs/fetch');
 import { SinkMap } from '@rdfjs/sink-map';
 import { Stream, Dataset, Quad, DatasetCoreFactory } from 'rdf-js';
 import { EventEmitter } from 'events';
+import { RdfFetchResponse } from '@rdfjs/fetch-lite';
 
 const formats: {
     parsers: SinkMap<EventEmitter, Stream>;
 } = <any> {};
 
+function noOptions(): Promise<RdfFetchResponse> {
+    return fetch('http://example.com/');
+}
+
+function allOptionsOptional(): Promise<RdfFetchResponse> {
+    return fetch('http://example.com/', {});
+}
+
 async function fetchString(): Promise<string> {
     const response = await fetch('http://example.com', { formats });
     return response.text();