diff --git a/eng/Versions.props b/eng/Versions.props
index fd835727abf880..ab04c003dc3a7a 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -52,7 +52,7 @@
     <!--
       TODO: Remove pinned version once arcade supplies a compiler that enables the repo to compile.
     -->
-    <MicrosoftNetCompilersToolsetVersion>4.4.0-2.22412.11</MicrosoftNetCompilersToolsetVersion>
+    <MicrosoftNetCompilersToolsetVersion>4.4.0-3.22452.8</MicrosoftNetCompilersToolsetVersion>
     <StaticCsVersion>0.2.0</StaticCsVersion>
     <!-- SDK dependencies -->
     <MicrosoftDotNetApiCompatTaskVersion>7.0.100-rc.1.22402.1</MicrosoftDotNetApiCompatTaskVersion>
diff --git a/src/coreclr/tools/aot/ILCompiler.TypeSystem.Tests/CoreTestAssembly/Platform.cs b/src/coreclr/tools/aot/ILCompiler.TypeSystem.Tests/CoreTestAssembly/Platform.cs
index 6935dd75d92c93..2239925645c77c 100644
--- a/src/coreclr/tools/aot/ILCompiler.TypeSystem.Tests/CoreTestAssembly/Platform.cs
+++ b/src/coreclr/tools/aot/ILCompiler.TypeSystem.Tests/CoreTestAssembly/Platform.cs
@@ -61,6 +61,14 @@ public struct RuntimeMethodHandle { }
     public struct RuntimeFieldHandle { }
 
     public class Attribute { }
+    public class AttributeUsageAttribute : Attribute
+    {
+        public AttributeUsageAttribute(AttributeTargets targets) { }
+        public bool AllowMultiple { get; set; }
+        public bool Inherited { get; set; }
+    }
+
+    public enum AttributeTargets { }
 
     public class ThreadStaticAttribute : Attribute { }
 
diff --git a/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj b/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj
index 28bc6b32221b13..b7da9d3e90becb 100644
--- a/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj
+++ b/src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj
@@ -45,7 +45,6 @@
   </ItemGroup>
   <ItemGroup Condition="'$(TargetPlatformIdentifier)' == 'Browser'">
     <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.InteropServices.JavaScript\gen\JSImportGenerator\JSImportGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
-    <ProjectReference Include="$(LibrariesProjectRoot)System.Runtime.InteropServices\gen\Microsoft.Interop.SourceGeneration\Microsoft.Interop.SourceGeneration.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false" />
     <Reference Include="System.Runtime.InteropServices.JavaScript" />
   </ItemGroup>
 </Project>
diff --git a/src/libraries/System.Runtime/tests/System/Attributes.cs b/src/libraries/System.Runtime/tests/System/Attributes.cs
index d0b474f3110821..0b75b48ea133e7 100644
--- a/src/libraries/System.Runtime/tests/System/Attributes.cs
+++ b/src/libraries/System.Runtime/tests/System/Attributes.cs
@@ -331,10 +331,11 @@ public static void customAttributeCount()
         {
             List<CustomAttributeData> customAttributes = typeof(GetCustomAttribute).Module.CustomAttributes.ToList();
             // [System.Security.UnverifiableCodeAttribute()]
+            // [System.Runtime.CompilerServices.RefSafetyRulesAttribute((Int32)11)]
             // [TestAttributes.FooAttribute()]
             // [TestAttributes.ComplicatedAttribute((Int32)1, Stuff = 2)]
             // [System.Diagnostics.DebuggableAttribute((Boolean)True, (Boolean)False)]
-            Assert.Equal(4, customAttributes.Count);
+            Assert.Equal(5, customAttributes.Count);
         }
 
         [Fact]