diff --git a/test/Microsoft.AspNet.Razor.Runtime.Precompilation.Test/project.json b/test/Microsoft.AspNet.Razor.Runtime.Precompilation.Test/project.json
index 9cdb92972f..394d81aee8 100644
--- a/test/Microsoft.AspNet.Razor.Runtime.Precompilation.Test/project.json
+++ b/test/Microsoft.AspNet.Razor.Runtime.Precompilation.Test/project.json
@@ -25,6 +25,9 @@
         "dnx451": {
             "dependencies": {
                 "Moq": "4.2.1312.1622"
+            },
+            "frameworkAssemblies": {
+                "System.Text.Encoding": "4.0.0.0"
             }
         },
         "dnxcore50": {