diff --git a/src/libraries/System.Net.Sockets/src/Resources/Strings.resx b/src/libraries/System.Net.Sockets/src/Resources/Strings.resx
index 62f9bb2b41db9f..c2b2e397211ba5 100644
--- a/src/libraries/System.Net.Sockets/src/Resources/Strings.resx
+++ b/src/libraries/System.Net.Sockets/src/Resources/Strings.resx
@@ -262,4 +262,7 @@
   <data name="InvalidNullArgument" xml:space="preserve">
     <value>Null is not a valid value for {0}.</value>
   </data>
-</root>
\ No newline at end of file
+  <data name="Sockets_PlatformNotSupported" xml:space="preserve">
+    <value>System.Net.Sockets is not supported on this platform.</value>
+  </data>
+</root>
diff --git a/src/libraries/System.Net.Sockets/src/System.Net.Sockets.csproj b/src/libraries/System.Net.Sockets/src/System.Net.Sockets.csproj
index 6d9e6416ce67cb..211dd8a0eafd5e 100644
--- a/src/libraries/System.Net.Sockets/src/System.Net.Sockets.csproj
+++ b/src/libraries/System.Net.Sockets/src/System.Net.Sockets.csproj
@@ -5,12 +5,15 @@
     <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;$(NetCoreAppCurrent)-Unix;$(NetCoreAppCurrent)-Browser</TargetFrameworks>
     <Nullable>enable</Nullable>
   </PropertyGroup>
+  <PropertyGroup>
+    <GeneratePlatformNotSupportedAssemblyMessage Condition="'$(TargetsBrowser)' == 'true'">SR.Sockets_PlatformNotSupported</GeneratePlatformNotSupportedAssemblyMessage>
+  </PropertyGroup>
   <PropertyGroup>
     <!-- SYSTEM_NET_SOCKETS_DLL is required to allow source-level code sharing for types defined within the
          System.Net.Internals namespace. -->
     <DefineConstants>$(DefineConstants);SYSTEM_NET_SOCKETS_DLL</DefineConstants>
   </PropertyGroup>
-  <ItemGroup>
+  <ItemGroup Condition="'$(TargetsBrowser)' != 'true'">
     <!-- All configurations -->
     <Compile Include="System\Net\Sockets\SocketReceiveFromResult.cs" />
     <Compile Include="System\Net\Sockets\SocketReceiveMessageFromResult.cs" />
@@ -189,7 +192,7 @@
     <Compile Include="$(CommonPath)System\Net\CompletionPortHelper.Windows.cs"
              Link="Common\System\Net\CompletionPortHelper.Windows.cs" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true' ">
+  <ItemGroup Condition="'$(TargetsUnix)' == 'true'">
     <Compile Include="System\Net\Sockets\AcceptOverlappedAsyncResult.Unix.cs" />
     <Compile Include="System\Net\Sockets\BaseOverlappedAsyncResult.Unix.cs" />
     <Compile Include="System\Net\Sockets\ConnectOverlappedAsyncResult.Unix.cs" />
@@ -317,7 +320,7 @@
     <Reference Include="System.Threading.Overlapped" />
     <Reference Include="System.Threading.ThreadPool" />
   </ItemGroup>
-  <ItemGroup Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true'">
+  <ItemGroup Condition="'$(TargetsUnix)' == 'true'">
     <Reference Include="System.Threading.Thread" />
     <Reference Include="System.Runtime.CompilerServices.Unsafe" />
   </ItemGroup>
diff --git a/src/libraries/System.Net.Sockets/tests/FunctionalTests/AssemblyInfo.cs b/src/libraries/System.Net.Sockets/tests/FunctionalTests/AssemblyInfo.cs
index 83b66155954253..4c89f7536b3fa1 100644
--- a/src/libraries/System.Net.Sockets/tests/FunctionalTests/AssemblyInfo.cs
+++ b/src/libraries/System.Net.Sockets/tests/FunctionalTests/AssemblyInfo.cs
@@ -5,4 +5,4 @@
 
 [assembly: SkipOnCoreClr("System.Net.Tests are flaky and/or long running: https://github.com/dotnet/runtime/issues/131", RuntimeConfiguration.Checked)]
 [assembly: ActiveIssue("https://github.com/dotnet/runtime/issues/34690", TestPlatforms.Windows, TargetFrameworkMonikers.Netcoreapp, TestRuntimes.Mono)]
-
+[assembly: SkipOnMono("System.Net.Sockets is not supported on Browser", TestPlatforms.Browser)]
diff --git a/src/libraries/System.Net.Sockets/tests/FunctionalTests/System.Net.Sockets.Tests.csproj b/src/libraries/System.Net.Sockets/tests/FunctionalTests/System.Net.Sockets.Tests.csproj
index 73e4a078e1b7c0..ef710218ea2ada 100644
--- a/src/libraries/System.Net.Sockets/tests/FunctionalTests/System.Net.Sockets.Tests.csproj
+++ b/src/libraries/System.Net.Sockets/tests/FunctionalTests/System.Net.Sockets.Tests.csproj
@@ -3,6 +3,7 @@
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IncludeRemoteExecutor>true</IncludeRemoteExecutor>
     <TargetFrameworks>$(NetCoreAppCurrent)-Windows_NT;$(NetCoreAppCurrent)-Unix;$(NetCoreAppCurrent)-Browser</TargetFrameworks>
+    <IgnoreForCI Condition="'$(TargetOS)' == 'Browser'">true</IgnoreForCI>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Accept.cs" />
@@ -18,7 +19,7 @@
     <Compile Include="DnsEndPointTest.cs" />
     <Compile Include="DualModeSocketTest.cs" />
     <Compile Include="ExecutionContextFlowTest.cs" />
-    <Compile Include="InlineCompletions.Unix.cs" Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true'"/>
+    <Compile Include="InlineCompletions.Unix.cs" Condition="'$(TargetsUnix)' == 'true'"/>
     <Compile Include="IPPacketInformationTest.cs" />
     <Compile Include="KeepAliveTest.cs" />
     <Compile Include="LingerStateTest.cs" />
@@ -89,4 +90,4 @@
     <Compile Include="$(CommonPath)System\Net\Logging\NetEventSource.Common.cs"
              Link="Common\System\Net\Logging\NetEventSource.Common.cs" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index b5ee9f34a39777..ec5107ac0c555f 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -41,7 +41,6 @@
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Primitives\tests\FunctionalTests\System.Net.Primitives.Functional.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Primitives\tests\PalTests\System.Net.Primitives.Pal.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Security\tests\FunctionalTests\System.Net.Security.Tests.csproj" />
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.Sockets\tests\FunctionalTests\System.Net.Sockets.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Net.WebSockets.Client\tests\System.Net.WebSockets.Client.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.ObjectModel\tests\System.ObjectModel.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Private.Uri\tests\FunctionalTests\System.Private.Uri.Functional.Tests.csproj" />