diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index d682e3e..5891ada 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -15,6 +15,7 @@ export interface LangConfig {
   run: string;
   helloInput?: string;
   hello?: string;
+  helloMaxLength?: number;
   runReplInput?: string;
   runReplOutput?: string;
   scope?: {
@@ -675,6 +676,8 @@ output = "Hello, world!"
     main: "main.vge",
     compile: `mono /opt/entropy/entc.exe main.vge | grep -Ev 'WARNING:|Using default' > main.cs && mcs -lib:/opt/entropy -r:Rottytooth.Esolang.Entropy main.cs`,
     run: "MONO_PATH=/opt/entropy mono main.exe",
+    hello: `[F-J][c-g][j-n][j-n][m-q][*-.][\\x1e-"][u-y][m-q][p-t][j-n][b-f][\\x1f-#]`,
+    helloMaxLength: "Hello, world!".length,
     template: `Program MyNamespace MyProgram [
 	print "Hello, world!";
 ]
@@ -896,7 +899,7 @@ log('Hello, world!')
     aliases: ["i", "ick"],
     name: "INTERCAL",
     main: "main.i",
-    compile: "ick main.i",
+    compile: "ick -b main.i",
     run: "./main",
     template: `DO ,1 <- #14
 PLEASE DO ,1 SUB #1 <- #238
@@ -1016,7 +1019,6 @@ PLEASE GIVE UP
     name: "LiveScript",
     repl: "lsc",
     main: "main.ls",
-    hello: "Hello World",
     run: "lsc -r ./main.ls; lsc",
     template: `console.log "Hello, world!"
 `,
@@ -1063,6 +1065,7 @@ KTHXBYE
     name: "Malbolge",
     main: "main.mb",
     run: "malbolge main.mb",
+    hello: "Hello World!",
     template:
       " (=<`#9]~6ZY32Vx/4Rs+0No-&Jk)\"Fh}|Bcy?`=*z]Kw%oG4UUS0/@-ejc(:'8dc\n",
   },
@@ -1302,7 +1305,6 @@ end.
     repl: "php -a",
     input: "print 123 * 234;",
     main: "main.php",
-    hello: "Hello World!",
     run: "php -d auto_prepend_file=main.php -a",
     lsp: { start: "intelephense --stdio" },
     template: `<?php
@@ -1326,6 +1328,7 @@ echo "Hello, world!\\n";
     name: "Pikachu",
     main: "main.pokeball",
     run: "pikalang main.pokeball",
+    hello: "Hello World!",
     template: `pi pi pi pi pi pi pi pi pi pi pika pipi pi pi pi pi pi pi pi pipi pi pi
 pi pi pi pi pi pi pi pi pipi pi pi pi pipi pi pichu pichu pichu pichu ka
 chu pipi pi pi pikachu pipi pi pikachu pi pi pi pi pi pi pi pikachu
diff --git a/backend/src/test-runner.ts b/backend/src/test-runner.ts
index 3937c19..71989ca 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 = 5000;
-const CONCURRENCY = 32;
+const TIMEOUT_MS = 10000;
+const CONCURRENCY = 16;
 
 function findPosition(str: string, idx: number) {
   const lines = str.substring(0, idx).split("\n");
@@ -101,8 +101,8 @@ class Test {
         case "ensure":
           await this.testEnsure();
           break;
-        case "hello":
-          await this.testHello();
+        case "run":
+          await this.testRun();
           break;
         case "repl":
           await this.testRepl();
@@ -153,14 +153,22 @@ class Test {
     });
   };
 
-  waitForOutput = async (pattern: string) => {
+  waitForOutput = async (pattern: string, maxLength?: number) => {
     let output = "";
     return await this.wait(`output ${JSON.stringify(pattern)}`, (msg: any) => {
       const prevLength = output.length;
       if (msg.event === "terminalOutput") {
         output += msg.output;
       }
-      return output.indexOf(pattern, prevLength - pattern.length) != -1;
+      if (typeof maxLength === "number") {
+        return (
+          output
+            .substring(prevLength - maxLength)
+            .match(new RegExp(pattern)) !== null
+        );
+      } else {
+        return output.indexOf(pattern, prevLength - pattern.length) != -1;
+      }
     });
   };
 
@@ -175,7 +183,7 @@ class Test {
       throw new Error(`ensure failed with code ${code}`);
     }
   };
-  testHello = async () => {
+  testRun = async () => {
     const pattern = this.config.hello || "Hello, world!";
     this.send({ event: "runCode", code: this.config.template });
     if (this.config.helloInput !== undefined) {
@@ -184,7 +192,7 @@ class Test {
         input: forTTY(this.config.helloInput),
       });
     }
-    await this.waitForOutput(pattern);
+    await this.waitForOutput(pattern, this.config.helloMaxLength);
   };
   testRepl = async () => {
     const input = this.config.input || "123 * 234";
@@ -547,7 +555,7 @@ const testTypes: {
   ensure: {
     pred: ({ ensure }) => (ensure ? true : false),
   },
-  hello: { pred: (config) => true },
+  run: { pred: (config) => true },
   repl: {
     pred: ({ repl }) => (repl ? true : false),
   },
@@ -653,8 +661,7 @@ async function main() {
           `FAILED: ${lang}/${type}\n` +
             test.getLog({ pretty: true }) +
             "\n" +
-            err.stack +
-            "\n"
+            (err.stack ? err.stack + "\n" : err ? `${err}` : "")
         );
       })
       .catch(console.error);
@@ -671,8 +678,8 @@ async function main() {
   if (failed.size > 0) {
     console.error(`${failed.size} test${failed.size !== 1 ? "s" : ""} FAILED`);
     _.sortBy(Array.from(failed), [
-      "lang",
-      "type",
+      ([{ lang }, _]: any) => lang,
+      ([{ type }, _]: any) => type,
     ]).forEach(([{ lang, type }, err]) =>
       console.error(`  - ${lang}/${type} (${err})`)
     );
diff --git a/package.json b/package.json
index 1d89d3b..7550eb2 100644
--- a/package.json
+++ b/package.json
@@ -61,6 +61,6 @@
     "dev": "run-p backend-dev frontend-dev system-dev server-dev",
     "lsp-repl": "node backend/out/lsp-repl.js",
     "sandbox": "node backend/out/sandbox.js",
-    "test": "bash -c 'time node backend/out/test-runner.js'"
+    "test": "bash -c 'time node backend/out/test-runner.js \"$@\"' --"
   }
 }
diff --git a/tsconfig.json b/tsconfig.json
index c964b6b..a10f6ba 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,5 +1,6 @@
 {
   "compilerOptions": {
+    "downlevelIteration": true,
     "outDir": "./backend/out",
     "resolveJsonModule": true,
     "rootDir": "./backend/src",