diff --git a/test/ably/rest/resthttp_test.py b/test/ably/rest/resthttp_test.py
index a7f83783..b5a2fa4f 100644
--- a/test/ably/rest/resthttp_test.py
+++ b/test/ably/rest/resthttp_test.py
@@ -192,7 +192,7 @@ async def test_request_headers(self):
 
         # Agent
         assert 'Ably-Agent' in r.request.headers
-        expr = r"^ably-python\/\d.\d.\d(-beta\.\d)? python\/\d.\d+.\d+$"
+        expr = r"^ably-python\/\d+.\d+.\d+(-beta\.\d+)? python\/\d.\d+.\d+$"
         assert re.search(expr, r.request.headers['Ably-Agent'])
         await ably.close()