diff --git a/Robust.UnitTesting/Helpers.cs b/Robust.UnitTesting/Helpers.cs
index 065d815c4..0b6cf16c6 100644
--- a/Robust.UnitTesting/Helpers.cs
+++ b/Robust.UnitTesting/Helpers.cs
@@ -17,6 +17,7 @@ namespace Robust.UnitTesting
 
             var stream = new MemoryStream();
             stream.Write(Encoding.UTF8.GetBytes(content));
+            stream.Position = 0;
             resourceManager.MountStreamAt(stream, new ResourcePath(path));
         }
     }