diff --git a/tests/lib/chrome-versions.js b/tests/lib/chrome-versions.js
new file mode 100644
index 0000000..c6ef5e0
--- /dev/null
+++ b/tests/lib/chrome-versions.js
@@ -0,0 +1,64 @@
+/**
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import test from 'ava';
+import {
+  splitChromeRelease,
+  chromeVersions,
+  chromePublishedStable,
+} from '../../tools/lib/chrome-versions.js';
+
+test('splitChromeRelease', async (t) => {
+  /** @type {any} */
+  let scr;
+
+  // Returns undefined if too few parts
+  scr = await splitChromeRelease('88.0.4324');
+  t.is(scr, undefined);
+
+  // Returns undefined if too many parts
+  scr = await splitChromeRelease('88.0.4324.1.1');
+  t.is(scr, undefined);
+
+  // Returns major version is invalid
+  scr = await splitChromeRelease('a.b.c.d');
+  t.is(scr, undefined);
+
+  // Returns undefined if semantic version is invalid
+  scr = await splitChromeRelease('88.0.a.1');
+  t.is(scr, undefined);
+
+  // Returns release and rest of release tag if valid
+  scr = await splitChromeRelease('88.0.4324.47');
+  t.deepEqual(Object.keys(scr), ['release', 'rest']);
+  t.is(typeof scr.release, 'number');
+  t.is(typeof scr.rest, 'string');
+});
+
+test('chromeVersions', async (t) => {
+  // Returns head and map of chrome version releases
+  const cv = await chromeVersions();
+  t.is(typeof cv.head, 'string');
+  t.is(cv.releases instanceof Map, true);
+  t.is(cv.releases.size > 0, true);
+  t.deepEqual(Object.keys(cv), ['head', 'releases']);
+})
+
+test('chromePublishedStable', async (t) => {
+  // Returns number representing current stable version of Chrome
+  const cps = await chromePublishedStable();
+  t.is(typeof cps, 'number');
+});
diff --git a/tools/lib/chrome-versions.js b/tools/lib/chrome-versions.js
index d111700..c3b4c61 100644
--- a/tools/lib/chrome-versions.js
+++ b/tools/lib/chrome-versions.js
@@ -43,7 +43,7 @@ const omahaProxyUrl = 'https://omahaproxy.appspot.com/all.json';
 /**
  * @param {string} tag
  */
-function splitChromeRelease(tag) {
+export async function splitChromeRelease(tag) {
   // Look for versions like "88.0.4324.47". Ignore other tags.
   const parts = tag.split('.');
   if (parts.length !== 4) {
@@ -99,7 +99,7 @@ export async function chromeVersions() {
       continue;
     }
     const tag = rawTag.substr(tagPrefix.length);
-    const info = splitChromeRelease(tag);
+    const info = await splitChromeRelease(tag);
     if (!info) {
       continue;
     }