diff --git a/src/commands/doctor-session-transcripts.test.ts b/src/commands/doctor-session-transcripts.test.ts
index 3b5684d3edc..088e7e4a5d6 100644
--- a/src/commands/doctor-session-transcripts.test.ts
+++ b/src/commands/doctor-session-transcripts.test.ts
@@ -25,7 +25,7 @@ function countNonEmptyLines(value: string): number {
 }
 
 function requireFirstMockCall<T>(mock: { mock: { calls: T[][] } }, label: string): T[] {
-  const call = mock.mock.calls.at(0);
+  const call = mock.mock.calls[0];
   if (!call) {
     throw new Error(`expected ${label} call`);
   }