diff --git a/test/connection_string/test/valid-host_identifiers.json b/test/connection_string/test/valid-host_identifiers.json
index e8833b4af..f33358725 100644
--- a/test/connection_string/test/valid-host_identifiers.json
+++ b/test/connection_string/test/valid-host_identifiers.json
@@ -132,18 +132,18 @@
     },
     {
       "description": "UTF-8 hosts",
-      "uri": "mongodb://bücher.example.com,umläut.example.com/",
+      "uri": "mongodb://b\u00fccher.example.com,uml\u00e4ut.example.com/",
       "valid": true,
       "warning": false,
       "hosts": [
         {
           "type": "hostname",
-          "host": "bücher.example.com",
+          "host": "b\u00fccher.example.com",
           "port": null
         },
         {
           "type": "hostname",
-          "host": "umläut.example.com",
+          "host": "uml\u00e4ut.example.com",
           "port": null
         }
       ],