diff --git a/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDiffieHellman/ECDhKeyFileTests.cs b/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDiffieHellman/ECDhKeyFileTests.cs
index 2b814f581f90d5..197fcc49f113b7 100644
--- a/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDiffieHellman/ECDhKeyFileTests.cs
+++ b/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDiffieHellman/ECDhKeyFileTests.cs
@@ -7,6 +7,7 @@
 namespace System.Security.Cryptography.EcDiffieHellman.Tests
 {
     [SkipOnPlatform(TestPlatforms.Browser, "Not supported on Browser")]
+    [ActiveIssue("https://github.com/dotnet/runtime/issues/64389", TestPlatforms.Windows)]
     public class ECDhKeyFileTests : ECKeyFileTests<ECDiffieHellman>
     {
         protected override ECDiffieHellman CreateKey()
diff --git a/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDsa/ECDsaKeyFileTests.cs b/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDsa/ECDsaKeyFileTests.cs
index 46f88abb735a0d..d95a3f060622ec 100644
--- a/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDsa/ECDsaKeyFileTests.cs
+++ b/src/libraries/Common/tests/System/Security/Cryptography/AlgorithmImplementations/ECDsa/ECDsaKeyFileTests.cs
@@ -7,6 +7,7 @@
 namespace System.Security.Cryptography.EcDsa.Tests
 {
     [SkipOnPlatform(TestPlatforms.Browser, "Not supported on Browser")]
+    [ActiveIssue("https://github.com/dotnet/runtime/issues/64389", TestPlatforms.Windows)]
     public class ECDsaKeyFileTests : ECKeyFileTests<ECDsa>
     {
         protected override ECDsa CreateKey()