diff --git a/src/auto-reply/reply/reply-media-paths.test.ts b/src/auto-reply/reply/reply-media-paths.test.ts
index 7e9671a44c8c..9b24b53559e5 100644
--- a/src/auto-reply/reply/reply-media-paths.test.ts
+++ b/src/auto-reply/reply/reply-media-paths.test.ts
@@ -54,7 +54,7 @@ function expectOutboundAttachmentCall(
   mediaUrl: string,
   mediaMaxBytes: number,
 ): Record<string, unknown> {
-  const call = resolveOutboundAttachmentFromUrl.mock.calls[index] as unknown[] | undefined;
+  const call = resolveOutboundAttachmentFromUrl.mock.calls.at(index) as unknown[] | undefined;
   if (!call) {
     throw new Error(`missing outbound attachment call ${index + 1}`);
   }
@@ -64,7 +64,7 @@ function expectOutboundAttachmentCall(
 }
 
 function expectAgentScopedMediaAccessCall(): Record<string, unknown> {
-  const call = resolveAgentScopedOutboundMediaAccess.mock.calls[0] as unknown[] | undefined;
+  const call = resolveAgentScopedOutboundMediaAccess.mock.calls.at(0) as unknown[] | undefined;
   if (!call) {
     throw new Error("missing agent scoped media access call");
   }