diff --git a/src/cli/plugins-cli.list.test.ts b/src/cli/plugins-cli.list.test.ts
index b3ad08c669d..aab7291e9f8 100644
--- a/src/cli/plugins-cli.list.test.ts
+++ b/src/cli/plugins-cli.list.test.ts
@@ -38,7 +38,7 @@ describe("plugins cli list", () => {
     await runPluginsCommand(["plugins", "list", "--json"]);
 
     expect(buildPluginRegistrySnapshotReport).toHaveBeenCalledTimes(1);
-    const [reportOptions] = buildPluginRegistrySnapshotReport.mock.calls.at(0) as [
+    const [reportOptions] = buildPluginRegistrySnapshotReport.mock.calls[0] as [
       {
         config?: unknown;
         logger?: { info?: unknown; warn?: unknown; error?: unknown };
diff --git a/src/cli/plugins-cli.update.test.ts b/src/cli/plugins-cli.update.test.ts
index b2e716cc5b4..f358df22101 100644
--- a/src/cli/plugins-cli.update.test.ts
+++ b/src/cli/plugins-cli.update.test.ts
@@ -47,7 +47,7 @@ function expectRestartNoticeLogged() {
 
 function expectSingleCallParams(mockFn: ReturnType<typeof vi.fn>) {
   expect(mockFn).toHaveBeenCalledTimes(1);
-  const params = mockFn.mock.calls.at(0)?.[0] as Record<string, unknown> | undefined;
+  const params = mockFn.mock.calls[0]?.[0] as Record<string, unknown> | undefined;
   if (params === undefined) {
     throw new Error("expected call params");
   }