diff --git a/lib/http-mock.d.ts b/lib/http-mock.d.ts
index a2c3327..495f9c3 100644
--- a/lib/http-mock.d.ts
+++ b/lib/http-mock.d.ts
@@ -171,6 +171,7 @@ export type MockResponse<T extends ResponseType> = T & {
     _getHeaders: () => HeaderWebAPI;
     _getData: () => any;
     _getJSONData: () => T extends Response<infer ResBody> ? ResBody : any;
+    _getChunks: () => Buffer[];
     _getBuffer: () => Buffer;
     _getLocals: () => any;
     _getStatusCode: () => number;
diff --git a/test/lib/http-mock.test-d.ts b/test/lib/http-mock.test-d.ts
index 0604628..cd34c45 100644
--- a/test/lib/http-mock.test-d.ts
+++ b/test/lib/http-mock.test-d.ts
@@ -30,6 +30,9 @@ expectType<MockResponse<ExpressResponse<{ message: number }>>>(createResponse<Ex
 expectNotType<MockResponse<NodeResponse>>(createResponse<ExpressResponse<{ message: number }>>());
 expectAssignable<NodeResponse>(createResponse<ExpressResponse<{ message: number }>>());
 
+expectType<Buffer[]>(createResponse()._getChunks());
+expectType<Buffer[]>(createResponse<NodeResponse>()._getChunks());
+
 expectType<Mocks<ExpressRequest, ExpressResponse>>(createMocks());
 // eslint-disable-next-line no-undef
 expectType<Mocks<globalThis.Request, globalThis.Response>>(createMocks<globalThis.Request, globalThis.Response>());