diff --git a/src/System.Runtime/tests/System/LazyTests.cs b/src/System.Runtime/tests/System/LazyTests.cs
index 294d53ae4d12..707f7c7b8282 100644
--- a/src/System.Runtime/tests/System/LazyTests.cs
+++ b/src/System.Runtime/tests/System/LazyTests.cs
@@ -365,6 +365,7 @@ public static void Exceptions_Ctor_NotIdempotent(Lazy<ExceptionInCtor> x)
         }
 
         [Fact]
+        [ActiveIssue(19119, TargetFrameworkMonikers.Netcoreapp)]
         public static void Serialization_ValueType()
         {
             Lazy<int> fortytwo = BinaryFormatterHelpers.Clone(new Lazy<int>(() => 42));
@@ -373,6 +374,7 @@ public static void Serialization_ValueType()
         }
 
         [Fact]
+        [ActiveIssue(19119, TargetFrameworkMonikers.Netcoreapp)]
         public static void Serialization_RefType()
         {
             Lazy<string> fortytwo = BinaryFormatterHelpers.Clone(new Lazy<string>(() => "42"));