diff --git a/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostAddressesTest.cs b/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostAddressesTest.cs
index 3273ebc49cffc7..61b70f2a7a395a 100644
--- a/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostAddressesTest.cs
+++ b/src/libraries/System.Net.NameResolution/tests/FunctionalTests/GetHostAddressesTest.cs
@@ -132,6 +132,7 @@ public async Task DnsGetHostAddresses_IPStringAndIncorrectFamily_ReturnsNoIPs(bo
         };
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/124079", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst)]
         public void DnsGetHostAddresses_LocalHost_ReturnsSameAsGetHostEntry()
         {
             IPAddress[] addresses = Dns.GetHostAddresses(TestSettings.LocalHost);
diff --git a/src/libraries/System.Reflection.MetadataLoadContext/tests/src/Tests/CustomAttributes/DllImportTests.cs b/src/libraries/System.Reflection.MetadataLoadContext/tests/src/Tests/CustomAttributes/DllImportTests.cs
index b157e3ac5f1552..5888dd0b05c1ae 100644
--- a/src/libraries/System.Reflection.MetadataLoadContext/tests/src/Tests/CustomAttributes/DllImportTests.cs
+++ b/src/libraries/System.Reflection.MetadataLoadContext/tests/src/Tests/CustomAttributes/DllImportTests.cs
@@ -14,6 +14,7 @@ namespace System.Reflection.Tests
     public static partial class CustomAttributeTests
     {
         [ActiveIssue("https://github.com/mono/mono/issues/15340", TestRuntimes.Mono)]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/124344", typeof(PlatformDetection), nameof(PlatformDetection.IsAppleMobile), nameof(PlatformDetection.IsCoreCLR))]
         [Fact]
         public static void TestDllImportPseudoCustomAttribute()
         {
diff --git a/src/libraries/System.Security.Cryptography/tests/IncrementalHashTests.cs b/src/libraries/System.Security.Cryptography/tests/IncrementalHashTests.cs
index b70cc5c913fae8..0d4ca408038ec7 100644
--- a/src/libraries/System.Security.Cryptography/tests/IncrementalHashTests.cs
+++ b/src/libraries/System.Security.Cryptography/tests/IncrementalHashTests.cs
@@ -4,6 +4,7 @@
 using System.Collections.Generic;
 using System.Threading;
 using Microsoft.DotNet.RemoteExecutor;
+using Microsoft.DotNet.XUnitExtensions;
 using Test.Cryptography;
 using Xunit;
 
@@ -134,6 +135,7 @@ public static void Verify_Clone_HMAC(HMAC referenceAlgorithm, HashAlgorithmName
 
         [Theory]
         [MemberData(nameof(GetHashAlgorithms))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/124344", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst)]
         public static void Verify_Clone_Hash(HashAlgorithm referenceAlgorithm, HashAlgorithmName hashAlgorithmName)
         {
             VerifyCloneResult(referenceAlgorithm, () => IncrementalHash.CreateHash(hashAlgorithmName));