diff --git a/src/types.test.ts b/src/types.test.ts
new file mode 100644
index 00000000..bdb5ffb3
--- /dev/null
+++ b/src/types.test.ts
@@ -0,0 +1,17 @@
+import { LATEST_PROTOCOL_VERSION, SUPPORTED_PROTOCOL_VERSIONS} from "./types.js";
+
+describe("Types", () => {
+
+    test("should have correct latest protocol version", () => {
+        expect(LATEST_PROTOCOL_VERSION).toBeDefined();
+        expect(LATEST_PROTOCOL_VERSION).toBe("2025-03-26");
+    });
+    test("should have correct supported protocol versions", () => {
+        expect(SUPPORTED_PROTOCOL_VERSIONS).toBeDefined();
+        expect(SUPPORTED_PROTOCOL_VERSIONS).toBeInstanceOf(Array);
+        expect(SUPPORTED_PROTOCOL_VERSIONS).toContain(LATEST_PROTOCOL_VERSION);
+        expect(SUPPORTED_PROTOCOL_VERSIONS).toContain("2024-11-05");
+        expect(SUPPORTED_PROTOCOL_VERSIONS).toContain("2024-10-07");
+    });
+
+});