diff --git a/types/relay-runtime/index.d.ts b/types/relay-runtime/index.d.ts
index dbafde4fe1..27ae20706c 100644
--- a/types/relay-runtime/index.d.ts
+++ b/types/relay-runtime/index.d.ts
@@ -138,6 +138,24 @@ export type SubscribeFunction = (
     observer: LegacyObserver<QueryPayload>
 ) => RelayObservable<QueryPayload> | Disposable;
 
+// ~~~~~~~~~~~~~~~~~~~~~
+// RelayQueryResponseCache
+// Version: Relay 1.3.0
+// File: https://github.com/facebook/relay/blob/master/packages/relay-runtime/network/RelayQueryResponseCache.js
+// ~~~~~~~~~~~~~~~~~~~~~
+
+/**
+ * A cache for storing query responses, featuring:
+ * - `get` with TTL
+ * - cache size limiting, with least-recently *updated* entries purged first
+ */
+export class QueryResponseCache {
+    constructor(options: {size: number; ttl: number});
+    clear(): void;
+    get(queryID: string, variables: Variables): QueryPayload | null;
+    set(queryID: string, variables: Variables, payload: QueryPayload): void;
+}
+
 // ~~~~~~~~~~~~~~~~~~~~~
 // RelayStoreTypes
 // Version: Relay 1.3.0
diff --git a/types/relay-runtime/relay-runtime-tests.tsx b/types/relay-runtime/relay-runtime-tests.tsx
index 72f262cbfa..ff714ce4ee 100644
--- a/types/relay-runtime/relay-runtime-tests.tsx
+++ b/types/relay-runtime/relay-runtime-tests.tsx
@@ -7,6 +7,7 @@ import {
     ViewerHandler,
     RecordSourceInspector,
     commitLocalUpdate,
+    QueryResponseCache,
     ROOT_ID,
 } from "relay-runtime";
 
@@ -33,6 +34,9 @@ function fetchQuery(operation: any, variables: { [key: string]: string }, cacheC
 // Create a network layer from the fetch function
 const network = Network.create(fetchQuery);
 
+// Create a cache for storing query responses
+const cache = new QueryResponseCache({size: 250, ttl: 60000});
+
 // ~~~~~~~~~~~~~~~~~~~~~
 // Environment
 // ~~~~~~~~~~~~~~~~~~~~~