diff --git a/src/libraries/Microsoft.Extensions.Hosting/tests/UnitTests/Internal/HostTests.cs b/src/libraries/Microsoft.Extensions.Hosting/tests/UnitTests/Internal/HostTests.cs
index c345548c3a44c3..96a60b0d088c97 100644
--- a/src/libraries/Microsoft.Extensions.Hosting/tests/UnitTests/Internal/HostTests.cs
+++ b/src/libraries/Microsoft.Extensions.Hosting/tests/UnitTests/Internal/HostTests.cs
@@ -593,6 +593,7 @@ public async Task HostShutsDownWhenTokenTriggers()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public async Task HostStopAsyncCanBeCancelledEarly()
         {
@@ -625,6 +626,7 @@ public async Task HostStopAsyncCanBeCancelledEarly()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public async Task HostStopAsyncUsesDefaultTimeoutIfGivenTokenDoesNotFire()
         {
@@ -658,6 +660,7 @@ public async Task HostStopAsyncUsesDefaultTimeoutIfGivenTokenDoesNotFire()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public async Task WebHostStopAsyncUsesDefaultTimeoutIfNoTokenProvided()
         {
@@ -1215,6 +1218,7 @@ public async Task Host_InvokesConfigureServicesMethodsOnlyOnce()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public void Dispose_DisposesAppConfigurationProviders()
         {
@@ -1240,6 +1244,7 @@ public void Dispose_DisposesAppConfigurationProviders()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public void Dispose_DisposesHostConfigurationProviders()
         {
@@ -1316,6 +1321,7 @@ public async Task HostCallsDisposeAsyncOnServiceProviderWhenDisposeAsyncCalled()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public async Task DisposeAsync_DisposesAppConfigurationProviders()
         {
@@ -1341,6 +1347,7 @@ public async Task DisposeAsync_DisposesAppConfigurationProviders()
         }
 
         // Moq heavily utilizes RefEmit, which does not work on most aot workloads
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/128405", TestPlatforms.iOS | TestPlatforms.tvOS | TestPlatforms.MacCatalyst, TestRuntimes.CoreCLR)]
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsReflectionEmitSupported))]
         public async Task DisposeAsync_DisposesHostConfigurationProviders()
         {