diff --git a/http-server/src/main/java/com/facebook/airlift/http/server/HttpServerBinder.java b/http-server/src/main/java/com/facebook/airlift/http/server/HttpServerBinder.java
index 078cde728a..02eefb8c3c 100644
--- a/http-server/src/main/java/com/facebook/airlift/http/server/HttpServerBinder.java
+++ b/http-server/src/main/java/com/facebook/airlift/http/server/HttpServerBinder.java
@@ -16,7 +16,7 @@ public class HttpServerBinder
 
     private HttpServerBinder(Binder binder)
     {
-        this.binder = requireNonNull(binder, "binder is null").skipSources(getClass());
+        this.binder = requireNonNull(binder, "binder is null(for testing)").skipSources(getClass());
     }
 
     public static HttpServerBinder httpServerBinder(Binder binder)