diff --git a/test/Spring/Spring.Web.Mvc5.Tests/Spring.Web.Mvc5.Tests.build b/test/Spring/Spring.Web.Mvc5.Tests/Spring.Web.Mvc5.Tests.build
index 685fbb3a..7a19f1e1 100644
--- a/test/Spring/Spring.Web.Mvc5.Tests/Spring.Web.Mvc5.Tests.build
+++ b/test/Spring/Spring.Web.Mvc5.Tests/Spring.Web.Mvc5.Tests.build
@@ -84,6 +84,7 @@
 				<include name="System.Web.ApplicationServices.dll" />        
 				<include name="System.Web.Routing.dll"/>
 				<include name="System.Web.Services.dll" />
+				<include name="System.Net.Http.Formatting.dll" />
 				
 				<include name="Microsoft.Web.Infrastructure.dll" />