diff --git a/libs/langchain-google-common/src/chat_models.ts b/libs/langchain-google-common/src/chat_models.ts
index 4ee4e0f6ed05..d770c25b026f 100644
--- a/libs/langchain-google-common/src/chat_models.ts
+++ b/libs/langchain-google-common/src/chat_models.ts
@@ -54,7 +54,7 @@ import type {
 } from "./types.js";
 import { zodToGeminiParameters } from "./utils/zod_to_gemini_parameters.js";
 
-class ChatConnection<AuthOptions> extends AbstractGoogleLLMConnection<
+export class ChatConnection<AuthOptions> extends AbstractGoogleLLMConnection<
   BaseMessage[],
   AuthOptions
 > {