diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index 5891ada..b321ea9 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -1443,7 +1443,7 @@ main = do
     repl: "node /opt/qalb/repl.js",
     input: "(ضرب ١٢٣ ٢٣٤)",
     main: "main.qalb",
-    hello: "قو",
+    hello: "مرحبا يا عالم",
     run: "node /opt/qalb/repl.js main.qalb",
     template: `(قول "مرحبا يا عالم")
 `,
diff --git a/backend/src/test-runner.ts b/backend/src/test-runner.ts
index a9e2dd7..36c7f65 100644
--- a/backend/src/test-runner.ts
+++ b/backend/src/test-runner.ts
@@ -10,8 +10,8 @@ import { v4 as getUUID } from "uuid";
 import * as api from "./api";
 import { LangConfig, langs } from "./langs";
 
-const TIMEOUT_MS = 10000;
-const CONCURRENCY = 16;
+const TIMEOUT_MS = 16000;
+const CONCURRENCY = 24;
 
 function findPosition(str: string, idx: number) {
   const lines = str.substring(0, idx).split("\n");