diff --git a/src/lib/response.ts b/src/lib/response.ts
index 58bb486..5ba42fb 100644
--- a/src/lib/response.ts
+++ b/src/lib/response.ts
@@ -62,7 +62,7 @@ export class GotFetchResponse implements Response {
   }
 
   arrayBuffer(): Promise<ArrayBuffer> {
-    throw new Error();
+    throw new Error("`arrayBuffer` not implemented");
   }
 
   blob(): Promise<Blob> {
@@ -98,4 +98,4 @@ export class GotFetchResponse implements Response {
   static error(): GotFetchResponse {
     return new GotFetchResponse(null, { type: 'error' });
   }
-}
\ No newline at end of file
+}