diff --git a/tests/test_request.py b/tests/test_request.py
index 59e6865..2db711a 100644
--- a/tests/test_request.py
+++ b/tests/test_request.py
@@ -55,6 +55,8 @@ def test_check_connect(port=None):
 
 
 def test_update_query_params():
-    assert update_query_params('http://example.com/', {'foo': 1}) == 'http://example.com/?foo=1'
-    assert update_query_params('http://example.com/?foo=1', {'foo': 2}) == 'http://example.com/?foo=2'
-    assert update_query_params('http://example.com/?foo=1', {'foo': 2, 'bar': 3}) == 'http://example.com/?foo=2&bar=3'
+    base = 'http://example.com/'
+    assert update_query_params(base, {'foo': 1}) == base + '?foo=1'
+    assert update_query_params(base + '?foo=1', {'foo': 2}) == base + '?foo=2'
+    assert update_query_params(base + '?foo=1', {'foo': 2, 'bar': 3}) in \
+           (base + '?foo=2&bar=3', base + '?foo=2&bar=3')