diff --git a/src/domain/recordedTransportUrl.test.ts b/src/domain/recordedTransportUrl.test.ts
new file mode 100644
index 000000000..9c7b78ea0
--- /dev/null
+++ b/src/domain/recordedTransportUrl.test.ts
@@ -0,0 +1,11 @@
+import { expect, it } from "vitest";
+
+import { parseRecordedTransportUrl } from "./recordedTransportUrl.js";
+
+it("recognizes an empty userinfo marker at the authority start", () => {
+  expect(parseRecordedTransportUrl("https://@host")).toMatchObject({
+    origin: "https://host",
+    path: "/",
+    credentials: { start: 8, end: 9 },
+  });
+});