diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 0aaa1549675b30..aa2032acc15050 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -189,10 +189,10 @@
 
   <ItemGroup Condition="'$(TargetOS)' == 'iOS' and '$(RunDisablediOSTests)' != 'true'">
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)*\tests\**\*.Tests.csproj" />
-    
+
     <!-- Ref.Emit in XSLCompiledTransform -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Private.Xml\tests\Xslt\XslCompiledTransformApi\System.Xml.Xsl.XslCompiledTransformApi.Tests.csproj" />
-    
+
     <!-- Functional tests on devices have problems with return codes from mlaunch -->
     <ProjectExclusions Include="$(RepoRoot)\src\tests\FunctionalTests\$(TargetOS)\Device\**\*.Test.csproj" />
   </ItemGroup>
@@ -214,9 +214,9 @@
     <!-- Has deps that JIT, need re-done in order to pass -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.Hosting/tests/UnitTests/Microsoft.Extensions.Hosting.Unit.Tests.csproj" />
 
-    <!-- 
+    <!--
         Test suites hang and time out.
-        https://github.com/dotnet/runtime/issues/60713 
+        https://github.com/dotnet/runtime/issues/60713
     -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.DependencyInjection/tests/DI.External.Tests/Microsoft.Extensions.DependencyInjection.ExternalContainers.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.NetworkInformation/tests/FunctionalTests/System.Net.NetworkInformation.Functional.Tests.csproj" />
@@ -230,11 +230,11 @@
   <!-- Excluding all tests for aot catalyst until building on helix works properly -->
   <ItemGroup Condition="('$(TargetOS)' == 'MacCatalyst' and '$(BuildTestsOnHelix)' == 'true') and '$(RunDisablediOSTests)' != 'true'">
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)*\tests\**\*.Tests.csproj" />
-    
+
     <!-- No functional tests until helix stabilizes -->
     <ProjectExclusions Include="$(RepoRoot)\src\tests\FunctionalTests\iOS\Simulator\**\*.Test.csproj" />
   </ItemGroup>
-  
+
   <ItemGroup Condition="'$(TargetOS)' == 'MacCatalyst'">
     <ProjectExclusions Include="$(RepoRoot)/src/tests/FunctionalTests/iOS/Simulator/XmlFormatWriterGeneratorAOT/iOS.Simulator.XmlFormatWriterGeneratorAot.Test.csproj" />
   </ItemGroup>
@@ -283,6 +283,14 @@
   <ItemGroup Condition="'$(TargetOS)' == 'Browser' and '$(RunDisabledWasmTests)' != 'true'">
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.NETCore.Platforms\tests\Microsoft.NETCore.Platforms.Tests.csproj" />
 
+    <!-- This test is disabled via an assembly-level attribute in source. We exclude it here to avoid queuing/running a work item entirely.
+         https://github.com/dotnet/runtime/issues/35970 -->
+    <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.Caching.Memory\tests\Microsoft.Extensions.Caching.Memory.Tests.csproj" />
+
+    <!-- This test is disabled via an assembly-level attribute in source. We exclude it here to avoid queuing/running a work item entirely.
+         https://github.com/mono/mono/issues/16417 -->
+    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.ComponentModel.Composition\tests\System.ComponentModel.Composition.Tests.csproj" />
+
     <!-- Mono-Browser ignores runtimeconfig.template.json (e.g. for this it has "System.Globalization.EnforceJapaneseEraYearRanges": true) -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Globalization.Calendars\tests\CalendarTestWithConfigSwitch\System.Globalization.CalendarsWithConfigSwitch.Tests.csproj" />