diff --git a/spec/http/client_spec.rb b/spec/http/client_spec.rb
index bd666a3f..36583f2d 100644
--- a/spec/http/client_spec.rb
+++ b/spec/http/client_spec.rb
@@ -91,7 +91,7 @@ def simple_response(body, status = 200)
 
     it 'merges duplicate values' do
       expect(HTTP::Request).to receive(:new) do |_, uri|
-        expect(uri.query).to eq 'a=1&a=2'
+        expect(uri.query).to match(/^(a=1&a=2|a=2&a=1)$/)
       end
 
       client.get('http://example.com/?a=1', :params => {:a => 2})