diff --git a/test/Spring/Spring.Core.Tests/AssemblyInfo.cs b/test/Spring/Spring.Core.Tests/AssemblyInfo.cs
index 2e09197e..4c097f75 100644
--- a/test/Spring/Spring.Core.Tests/AssemblyInfo.cs
+++ b/test/Spring/Spring.Core.Tests/AssemblyInfo.cs
@@ -1,5 +1,8 @@
 using System.Reflection;
 using System.Runtime.CompilerServices;
 
+#if NET_4_0
+[assembly: System.Security.SecurityRules(System.Security.SecurityRuleSet.Level1)] 
+#endif
 [assembly: AssemblyTitle("Spring.Core Tests")]
 [assembly: AssemblyDescription("Unit tests for Spring.Core assembly")]