diff --git a/test/Microsoft.OpenApi.Tests/Models/OpenApiLinkTests.cs b/test/Microsoft.OpenApi.Tests/Models/OpenApiLinkTests.cs
index ad02e1e4e..2f4a532a7 100644
--- a/test/Microsoft.OpenApi.Tests/Models/OpenApiLinkTests.cs
+++ b/test/Microsoft.OpenApi.Tests/Models/OpenApiLinkTests.cs
@@ -17,7 +17,7 @@ namespace Microsoft.OpenApi.Tests.Models
     [UsesVerify]
     public class OpenApiLinkTests
     {
-        public static OpenApiLink AdvancedLink = new()
+        public static readonly OpenApiLink AdvancedLink = new()
         {
             OperationId = "operationId1",
             Parameters =
@@ -41,7 +41,7 @@ public class OpenApiLinkTests
             }
         };
 
-        public static OpenApiLink ReferencedLink = new()
+        public static readonly OpenApiLink ReferencedLink = new()
         {
             Reference = new()
             {