diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 0438f60445292c..972bf496bab7e7 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -539,6 +539,10 @@
   <!-- browser smoke tests -->
   <ItemGroup Condition="'$(TargetOS)' == 'browser'">
     <SmokeTestProject Include="$(MSBuildThisFileDirectory)System.Runtime.Intrinsics\tests\System.Runtime.Intrinsics.Tests.csproj" />
+    <SmokeTestProject Include="$(MSBuildThisFileDirectory)System.Memory\tests\System.Memory.Tests.csproj" />
+    <SmokeTestProject Include="$(MSBuildThisFileDirectory)System.Text.RegularExpressions\tests\FunctionalTests\System.Text.RegularExpressions.Tests.csproj" />
+    <SmokeTestProject Include="$(MSBuildThisFileDirectory)System.Runtime/tests/System.IO.UnmanagedMemoryStream.Tests/System.IO.UnmanagedMemoryStream.Tests.csproj" />
+    <SmokeTestProject Include="$(MSBuildThisFileDirectory)System.Diagnostics.StackTrace/tests/System.Diagnostics.StackTrace.Tests.csproj" />
   </ItemGroup>
 
   <!-- wasi/interp smoke tests -->