diff --git a/test/unit/adapters/http.js b/test/unit/adapters/http.js
index ed3db64..11e2fa3 100644
--- a/test/unit/adapters/http.js
+++ b/test/unit/adapters/http.js
@@ -447,7 +447,7 @@ describe('supports http with nodejs', function () {
       res.end(req.headers['user-agent']);
     }).listen(4444, function () {
       axios.get('http://localhost:4444/').then(function (res) {
-        assert.ok(/^axios\/[\d.]+$/.test(res.data), `User-Agent header does not match: ${res.data}`);
+        assert.ok(/^axios\/[\d.]+[-]?[a-z]*[.]?[\d]+$/.test(res.data), `User-Agent header does not match: ${res.data}`);
         done();
       }).catch(done);
     });