diff --git a/packages/safe-chain/src/installation/downloadAgent.spec.js b/packages/safe-chain/src/installation/downloadAgent.spec.js
index 17aecb9..48d2fe8 100644
--- a/packages/safe-chain/src/installation/downloadAgent.spec.js
+++ b/packages/safe-chain/src/installation/downloadAgent.spec.js
@@ -2,18 +2,19 @@ import { describe, it, after } from "node:test";
 import assert from "node:assert";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
-import { unlinkSync } from "node:fs";
+import { unlinkSync, writeFileSync } from "node:fs";
+import { createHash } from "node:crypto";
 import {
   DOWNLOAD_URLS,
-  downloadFile,
+  getAgentDownloadUrl,
   verifyChecksum,
 } from "./downloadAgent.js";
 
-describe("downloadAgent checksums", { timeout: 120_000 }, () => {
-  const downloadedFiles = [];
+describe("downloadAgent", () => {
+  const tempFiles = [];
 
   after(() => {
-    for (const file of downloadedFiles) {
+    for (const file of tempFiles) {
       try {
         unlinkSync(file);
       } catch {
@@ -24,22 +25,40 @@ describe("downloadAgent checksums", { timeout: 120_000 }, () => {
 
   for (const [platform, architectures] of Object.entries(DOWNLOAD_URLS)) {
     for (const [arch, { url, checksum }] of Object.entries(architectures)) {
-      it(`${platform}/${arch} checksum matches`, async () => {
-        const destPath = join(
-          tmpdir(),
-          `safe-chain-test-${platform}-${arch}-${Date.now()}`
-        );
-        downloadedFiles.push(destPath);
-
-        await downloadFile(url, destPath);
-
-        const isValid = await verifyChecksum(destPath, checksum);
-        assert.strictEqual(
-          isValid,
-          true,
-          `Checksum mismatch for ${platform}/${arch} (${url})`
+      it(`${platform}/${arch} has a valid download definition`, () => {
+        assert.match(
+          url,
+          /^https:\/\/github\.com\/AikidoSec\/safechain-internals\/releases\/download\/v\d+\.\d+\.\d+\/.+/,
         );
+        assert.match(checksum, /^sha256:[a-f0-9]{64}$/);
       });
     }
   }
+
+  it("builds agent download URLs from the current version", () => {
+    assert.equal(
+      getAgentDownloadUrl("SafeChainUltimate.pkg"),
+      "https://github.com/AikidoSec/safechain-internals/releases/download/v1.0.0/SafeChainUltimate.pkg",
+    );
+  });
+
+  it("verifies checksum for a local file", async () => {
+    const destPath = join(tmpdir(), `safe-chain-test-${Date.now()}`);
+    tempFiles.push(destPath);
+
+    writeFileSync(destPath, "safe-chain-test");
+
+    const expectedHash = createHash("sha256")
+      .update("safe-chain-test")
+      .digest("hex");
+
+    assert.equal(
+      await verifyChecksum(destPath, `sha256:${expectedHash}`),
+      true,
+    );
+    assert.equal(
+      await verifyChecksum(destPath, `sha256:${"0".repeat(64)}`),
+      false,
+    );
+  });
 });