diff --git a/tests/local.ts b/tests/local.ts
index 5858743f4..bba4ce566 100644
--- a/tests/local.ts
+++ b/tests/local.ts
@@ -1,4 +1,4 @@
 import "./local/snowflake.ts";
-import "./util/validateLength.ts";
-import "./util/hasProperty.ts";
+import "./util/validate_length.ts";
+import "./util/utils.ts";
 import "./util/hash.ts";
diff --git a/tests/util/hasProperty.ts b/tests/util/utils.ts
similarity index 51%
rename from tests/util/hasProperty.ts
rename to tests/util/utils.ts
index 7cf0bd412..8ec25bee2 100644
--- a/tests/util/hasProperty.ts
+++ b/tests/util/utils.ts
@@ -1,5 +1,8 @@
-import { hasProperty } from "../../src/util/utils.ts";
+import { hasProperty, delay } from "../../src/util/utils.ts";
 import { assertEquals } from "../deps.ts";
+
+// hasProperty
+
 const obj = { prop: "lts372005" };
 Deno.test({
   name: "[utils] hasProperty does HAVE property",
@@ -13,3 +16,15 @@ Deno.test({
     assertEquals(hasProperty(obj, "lts372005"), false);
   },
 });
+
+// delay
+
+Deno.test({
+  name: "[utils] delay 2000 ms",
+  async fn() {
+    const before = Date.now();
+    await delay(2000);
+    const after = Date.now();
+    if (after - before < 2000) throw new Error(`delay(2000) delayed ${after - before}ms`);
+  },
+});
diff --git a/tests/util/validateLength.ts b/tests/util/validate_length.ts
similarity index 100%
rename from tests/util/validateLength.ts
rename to tests/util/validate_length.ts