diff --git a/test/Microsoft.AspNet.Cors.Core.Test/CorsPolicyTests.cs b/test/Microsoft.AspNet.Cors.Core.Test/CorsPolicyTests.cs
index 877dee85b3..f9e290818e 100644
--- a/test/Microsoft.AspNet.Cors.Core.Test/CorsPolicyTests.cs
+++ b/test/Microsoft.AspNet.Cors.Core.Test/CorsPolicyTests.cs
@@ -40,7 +40,7 @@ namespace Microsoft.AspNet.Cors.Core.Test
 
             // Assert
             Assert.Equal(
-                "PreflightMaxAge must be greater than or equal to 0.\r\nParameter name: value",
+                $"PreflightMaxAge must be greater than or equal to 0.{Environment.NewLine}Parameter name: value",
                 exception.Message);
         }
 
diff --git a/test/Microsoft.AspNet.Cors.Core.Test/CorsResultTests.cs b/test/Microsoft.AspNet.Cors.Core.Test/CorsResultTests.cs
index b465edf57b..fca9916c05 100644
--- a/test/Microsoft.AspNet.Cors.Core.Test/CorsResultTests.cs
+++ b/test/Microsoft.AspNet.Cors.Core.Test/CorsResultTests.cs
@@ -37,7 +37,7 @@ namespace Microsoft.AspNet.Cors.Core.Test
 
             // Assert
             Assert.Equal(
-                "PreflightMaxAge must be greater than or equal to 0.\r\nParameter name: value",
+                $"PreflightMaxAge must be greater than or equal to 0.{Environment.NewLine}Parameter name: value",
                 exception.Message);
         }