diff --git a/.harness-setup-ok b/.harness-setup-ok
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/packages/core/src/code_assist/oauth2.ts b/packages/core/src/code_assist/oauth2.ts
index 0e4cb50ab63..4b02b3a5e43 100644
--- a/packages/core/src/code_assist/oauth2.ts
+++ b/packages/core/src/code_assist/oauth2.ts
@@ -490,6 +490,7 @@ async function authWithWeb(client: OAuth2Client): Promise<OauthWebLogin> {
               'OAuth callback not received. Unexpected request: ' + req.url,
             ),
           );
+          return;
         }
         // acquire the code from the querystring, and close the web server.
         const qs = new url.URL(req.url!, 'http://127.0.0.1:3000').searchParams;