diff --git a/java/client/test/org/openqa/selenium/ProxySettingTest.java b/java/client/test/org/openqa/selenium/ProxySettingTest.java
index b611ac1f27985..d595369dc5a13 100644
--- a/java/client/test/org/openqa/selenium/ProxySettingTest.java
+++ b/java/client/test/org/openqa/selenium/ProxySettingTest.java
@@ -235,6 +235,7 @@ private WebServer createSimpleHttpServer(final String responseHtml) {
       public void handleHttpRequest(
           HttpRequest request, HttpResponse response, HttpControl control) {
         response.charset(Charsets.UTF_8)
+            .header(HttpHeaders.CONTENT_TYPE, "text/html")
             .content(responseHtml)
             .end();
       }