diff --git a/eng/build.sh b/eng/build.sh
index 1cab7739726fa3..b4c11ca61a72e2 100755
--- a/eng/build.sh
+++ b/eng/build.sh
@@ -542,6 +542,10 @@ fi
 if [[ "$os" == "browser" ]]; then
     # override default arch for Browser, we only support wasm
     arch=wasm
+    # because on docker instance without swap file, MSBuild nodes need to make some room for LLVM
+    # https://github.com/dotnet/runtime/issues/113724
+    # this is hexa percentage: 46-> 70%
+    export DOTNET_GCHeapHardLimitPercent="46"
 fi
 if [[ "$os" == "wasi" ]]; then
     # override default arch for wasi, we only support wasm
diff --git a/eng/pipelines/common/templates/wasm-library-tests.yml b/eng/pipelines/common/templates/wasm-library-tests.yml
index 51cf40074ff5bd..149215ea501937 100644
--- a/eng/pipelines/common/templates/wasm-library-tests.yml
+++ b/eng/pipelines/common/templates/wasm-library-tests.yml
@@ -80,7 +80,7 @@ jobs:
       isExtraPlatforms: ${{ parameters.isExtraPlatformsBuild }}
       testGroup: innerloop
       nameSuffix: LibraryTests${{ parameters.nameSuffix }}
-      buildArgs: -s mono+libs+host+packs+libs.tests -c $(_BuildConfig) /p:ArchiveTests=true /p:MonoEnableAssertMessages=true /p:BrowserHost=$(_hostedOs) $(_wasmRunSmokeTestsOnlyArg) $(chromeInstallArg) $(firefoxInstallArg) $(v8InstallArg) ${{ parameters.extraBuildArgs }}
+      buildArgs: -s mono+libs+host+packs+libs.tests -c $(_BuildConfig) /p:ArchiveTests=true /p:MonoEnableAssertMessages=true /p:BrowserHost=$(_hostedOs) $(_wasmRunSmokeTestsOnlyArg) $(chromeInstallArg) $(firefoxInstallArg) $(v8InstallArg) /maxcpucount:1 ${{ parameters.extraBuildArgs }}
       timeoutInMinutes: 240
       # if !alwaysRun, then:
       #   if this is runtime-wasm (isWasmOnlyBuild):
diff --git a/eng/testing/tests.wasm.targets b/eng/testing/tests.wasm.targets
index 65ab8ed35de7f8..0fc4926a782a41 100644
--- a/eng/testing/tests.wasm.targets
+++ b/eng/testing/tests.wasm.targets
@@ -87,7 +87,9 @@
     <WasmExtraFilesToDeploy Condition="'$(_UseWasmSymbolicator)' == 'true'" Include="$(ArtifactsBinDir)WasmSymbolicator\$(Configuration)\$(NetCoreAppToolCurrent)\WasmSymbolicator.dll" />
   </ItemGroup>
 
-  <Target Name="BundleTestWasmApp" DependsOnTargets="$(BundleTestWasmAppDependsOn)" />
+  <Target Name="BundleTestWasmApp" DependsOnTargets="$(BundleTestWasmAppDependsOn)" >
+    <ForceMSBuildGC />
+  </Target>
 
   <UsingTask Condition="'$(BuildAOTTestsOnHelix)' == 'true'"
              TaskName="Microsoft.WebAssembly.Build.Tasks.GenerateAOTProps"
diff --git a/src/tasks/WasmAppBuilder/ForceMSBuildGC.cs b/src/tasks/WasmAppBuilder/ForceMSBuildGC.cs
index 8ddf5d46bfefd5..b833556af7dfe5 100644
--- a/src/tasks/WasmAppBuilder/ForceMSBuildGC.cs
+++ b/src/tasks/WasmAppBuilder/ForceMSBuildGC.cs
@@ -7,6 +7,8 @@
 
 namespace Microsoft.WebAssembly.Build.Tasks
 {
+    // because on docker instance without swap file, MSBuild nodes need to make some room for LLVM
+    // https://github.com/dotnet/runtime/issues/113724
     public class ForceMSBuildGC : Task
     {
         public override bool Execute()