diff --git a/test/sentinel_test.rb b/test/sentinel_test.rb
index 2af3f3934..5122235af 100644
--- a/test/sentinel_test.rb
+++ b/test/sentinel_test.rb
@@ -30,7 +30,7 @@ def test_the_client_can_connect_to_available_slaves
       end
     }
     RedisMock.start(commands) do |port|
-      redis = build_slave_role_client(sentinels: [{ host: 'localhost', port: port }])
+      redis = build_slave_role_client(sentinels: [{ host: '127.0.0.1', port: port }])
       assert_equal 'PONG', redis.ping
     end
   end
@@ -45,7 +45,7 @@ def test_the_client_raises_error_when_there_is_no_available_slaves
       end
     }
     RedisMock.start(commands) do |port|
-      redis = build_slave_role_client(sentinels: [{ host: 'localhost', port: port }])
+      redis = build_slave_role_client(sentinels: [{ host: '127.0.0.1', port: port }])
       assert_raises(Redis::CannotConnectError) { redis.ping }
     end
   end