diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 3d42bd9ed94820d6d21cd8359f0b97773cf99b27..6abd99bb86a65e1ad9ac49daa9db2629b500790d 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,16 +1,16 @@
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.NETCore.Runtime.ICU.Transport" Version="7.0.0-preview.3.22115.2">
+    <Dependency Name="Microsoft.NETCore.Runtime.ICU.Transport" Version="7.0.0-preview.2.22081.1">
       <Uri>https://github.com/dotnet/icu</Uri>
-      <Sha>bc6d6740a2b8ba5c2943e1a7a0eaa9781a862050</Sha>
+      <Sha>4f251e7593b1150af58bba4f461698d6d4a1eb95</Sha>
     </Dependency>
     <Dependency Name="System.Net.MsQuic.Transport" Version="7.0.0-alpha.1.21529.3">
       <Uri>https://github.com/dotnet/msquic</Uri>
       <Sha>a7213b4676c1803bb251771291a525482d42e511</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NET.Workload.Emscripten.Manifest-7.0.100" Version="7.0.0-alpha.2.22111.1">
+    <Dependency Name="Microsoft.NET.Workload.Emscripten.Manifest-7.0.100" Version="7.0.0-alpha.2.22077.1">
       <Uri>https://github.com/dotnet/emsdk</Uri>
-      <Sha>e6541169ee0347b4c3af1b83a0ab9fc19121283c</Sha>
+      <Sha>b2054b98cb7b9e555cbbe19955df823ec81a93ad</Sha>
     </Dependency>
     <Dependency Name="System.ServiceModel.Primitives" Version="4.9.0-rc2.21473.1">
       <Uri>https://github.com/dotnet/wcf</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 29cff18cb57bcc7f5b5ef692527e89a91de849e7..3555161ca30c24ea1714a5853fc33689c8069783 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -184,7 +184,7 @@
     <MicrosoftNETILLinkTasksVersion>7.0.100-1.22115.2</MicrosoftNETILLinkTasksVersion>
     <MicrosoftNETILLinkAnalyzerPackageVersion>$(MicrosoftNETILLinkTasksVersion)</MicrosoftNETILLinkAnalyzerPackageVersion>
     <!-- ICU -->
-    <MicrosoftNETCoreRuntimeICUTransportVersion>7.0.0-preview.3.22115.2</MicrosoftNETCoreRuntimeICUTransportVersion>
+    <MicrosoftNETCoreRuntimeICUTransportVersion>7.0.0-preview.2.22081.1</MicrosoftNETCoreRuntimeICUTransportVersion>
     <!-- MsQuic -->
     <SystemNetMsQuicTransportVersion>7.0.0-alpha.1.21529.3</SystemNetMsQuicTransportVersion>
     <!-- Mono LLVM -->
@@ -197,7 +197,7 @@
     <runtimeosx1012x64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>11.1.0-alpha.1.22114.2</runtimeosx1012x64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
     <runtimeosx1012x64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>11.1.0-alpha.1.22114.2</runtimeosx1012x64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>
     <!-- emscripten / Node -->
-    <MicrosoftNETWorkloadEmscriptenManifest70100Version>7.0.0-alpha.2.22111.1</MicrosoftNETWorkloadEmscriptenManifest70100Version>
+    <MicrosoftNETWorkloadEmscriptenManifest70100Version>7.0.0-alpha.2.22077.1</MicrosoftNETWorkloadEmscriptenManifest70100Version>
     <MicrosoftNETRuntimeEmscriptenVersion>$(MicrosoftNETWorkloadEmscriptenManifest70100Version)</MicrosoftNETRuntimeEmscriptenVersion>
     <!-- workloads -->
     <SwixPackageVersion>1.1.87-gba258badda</SwixPackageVersion>
diff --git a/eng/pipelines/common/platform-matrix.yml b/eng/pipelines/common/platform-matrix.yml
index a6ccd0efc19be8aafe151d4bc226861437195207..22fa0be43584d6fb6aa576beb8a5ebcb7267b26e 100644
--- a/eng/pipelines/common/platform-matrix.yml
+++ b/eng/pipelines/common/platform-matrix.yml
@@ -303,7 +303,7 @@ jobs:
       targetRid: browser-wasm
       platform: Browser_wasm
       container:
-        image: ubuntu-18.04-webassembly-20211208134944-544b18c
+        image: ubuntu-18.04-webassembly-20210707133424-12f133e
         registry: mcr
       jobParameters:
         hostedOs: Linux
diff --git a/eng/pipelines/libraries/helix-queues-setup.yml b/eng/pipelines/libraries/helix-queues-setup.yml
index 346cc1076bc2e8875410ad1de44e51de6bb38ef0..dae9a05bec145c2d8cf7a73050c0fa444d4b290d 100644
--- a/eng/pipelines/libraries/helix-queues-setup.yml
+++ b/eng/pipelines/libraries/helix-queues-setup.yml
@@ -182,6 +182,6 @@ jobs:
 
     # WebAssembly windows
     - ${{ if eq(parameters.platform, 'Browser_wasm_win') }}:
-      - (Windows.Server.Core.1909.Amd64.Open)windows.10.amd64.server20h2.open@mcr.microsoft.com/dotnet-buildtools/prereqs:windowsservercore-2004-helix-webassembly-amd64-20211208140215-544b18c
+      - (Windows.Server.Core.1909.Amd64.Open)windows.10.amd64.server20h2.open@mcr.microsoft.com/dotnet-buildtools/prereqs:windowsservercore-2004-helix-webassembly-amd64-20210702131541-6837048
 
     ${{ insert }}: ${{ parameters.jobParameters }}
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 9802b78fd1f18cd691be7955150dc0145fb52cde..133f62f029a99d967ff9e82b0ca365aded7551ef 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -271,18 +271,6 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetOS)' == 'Browser' and '$(RunDisabledWasmTests)' != 'true' and '$(RunAOTCompilation)' != 'true'">
-    <!-- https://github.com/dotnet/runtime/issues/64774 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Linq\tests\System.Linq.Tests.csproj" />
-
-    <!-- https://github.com/dotnet/runtime/issues/64775 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.Tests\System.Text.Json.Tests.csproj" />
-    <!-- https://github.com/dotnet/runtime/issues/64769 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.RegularExpressions\tests\System.Text.RegularExpressions.Tests.csproj" />
-    <!-- https://github.com/dotnet/runtime/issues/65012 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Threading.Channels\tests\System.Threading.Channels.Tests.csproj" />
-
-    <!-- https://github.com/dotnet/runtime/issues/65335 -->
-    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Collections.Immutable\tests\System.Collections.Immutable.Tests.csproj" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetOS)' == 'Browser' and '$(RunDisabledWasmTests)' != 'true'">
diff --git a/src/mono/wasm/emscripten-version.txt b/src/mono/wasm/emscripten-version.txt
index 59ef4a7aa83773dc955cc173e558241f5604ed4c..8fe1046e01fc8e40519bb5ca5b5fb1118167071a 100644
--- a/src/mono/wasm/emscripten-version.txt
+++ b/src/mono/wasm/emscripten-version.txt
@@ -1 +1 @@
-2.0.34
\ No newline at end of file
+2.0.23
\ No newline at end of file