diff --git a/.github/workflows/es-actions.yml b/.github/workflows/es-actions.yml
index 3fa379920..1a5065252 100644
--- a/.github/workflows/es-actions.yml
+++ b/.github/workflows/es-actions.yml
@@ -49,6 +49,9 @@ jobs:
     - uses: actions/checkout@v3
       with:
         submodules: true
+    - uses: szenius/set-timezone@v1.2
+      with:
+        timezoneWindows: "Pacific Standard Time"
     - uses: lukka/get-cmake@latest
     - uses: GuillaumeFalourd/setup-windows10-sdk-action@v1.11
       with:
@@ -67,16 +70,34 @@ jobs:
         dir
     - name: Build Win32 Release
       run: |
-        CMake -G "Visual Studio 16 2019" -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_VERSION:STRING="10.0" -DCMAKE_SYSTEM_PROCESSOR=x86 -DESCARGOT_ARCH=x86 -DESCARGOT_MODE=release -Bout/win32_release_ninja/ -DESCARGOT_HOST=windows -DESCARGOT_OUTPUT=shell -DESCARGOT_LIBICU_SUPPORT=ON -DESCARGOT_LIBICU_SUPPORT_WITH_DLOPEN=OFF -DESCARGOT_TEST=ON -G Ninja -DCMAKE_C_COMPILER=cl -DCMAKE_CXX_COMPILER=cl -DCMAKE_BUILD_TYPE=release
+        CMake -G "Visual Studio 16 2019" -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_VERSION:STRING="10.0" -DCMAKE_SYSTEM_PROCESSOR=x86 -DESCARGOT_ARCH=x86 -DESCARGOT_MODE=release -Bout/win32_release_ninja/ -DESCARGOT_HOST=windows -DESCARGOT_OUTPUT=shell -DESCARGOT_LIBICU_SUPPORT=ON -DESCARGOT_LIBICU_SUPPORT_WITH_DLOPEN=OFF -DESCARGOT_THREADING=ON -DESCARGOT_TEST=ON -G Ninja -DCMAKE_C_COMPILER=cl -DCMAKE_CXX_COMPILER=cl -DCMAKE_BUILD_TYPE=release
         CMake --build out/win32_release_ninja/ --config Release
         .\out\win32_release_ninja\escargot.exe run.js
+    - name: Build Test data runner
+      run: |
+        cl tools\test\test-data-runner\test-data-runner.cpp /std:c11 /DWIN32
+    - name: Download test262 data
+      uses: actions/cache@v3
+      with:
+        key: test262_dump
+        path: test262_dump.zip
+    - name: Archive Release
+      uses: thedoctor0/zip-release@0.7.1
+      with:
+        type: 'zip'
+        filename: 'test262_dump.zip'
+    - name: Run test262
+      run: |
+        set GC_FREE_SPACE_DIVISOR=1
+        dir
+        .\test-data-runner.exe --test test262 --test-data .\test262_data\ --shell .\out\win32_release_ninja\escargot.exe --skip intl402 --skip Temporal --threads 4
     - uses: ilammy/msvc-dev-cmd@v1.12.1
       with:
         arch: x64
         sdk: "10.0.20348.0"
     - name: Build Win64 Release
       run: |
-        CMake -G "Visual Studio 16 2019" -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_VERSION:STRING="10.0" -DCMAKE_SYSTEM_PROCESSOR=x64 -DESCARGOT_ARCH=x64 -DESCARGOT_MODE=release -Bout/win64_release_ninja/ -DESCARGOT_HOST=windows -DESCARGOT_OUTPUT=shell -DESCARGOT_LIBICU_SUPPORT=ON -DESCARGOT_LIBICU_SUPPORT_WITH_DLOPEN=OFF -DESCARGOT_TEST=ON -G Ninja -DCMAKE_C_COMPILER=cl -DCMAKE_CXX_COMPILER=cl -DCMAKE_BUILD_TYPE=release
+        CMake -G "Visual Studio 16 2019" -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_VERSION:STRING="10.0" -DCMAKE_SYSTEM_PROCESSOR=x64 -DESCARGOT_ARCH=x64 -DESCARGOT_MODE=release -Bout/win64_release_ninja/ -DESCARGOT_HOST=windows -DESCARGOT_OUTPUT=shell -DESCARGOT_LIBICU_SUPPORT=ON -DESCARGOT_LIBICU_SUPPORT_WITH_DLOPEN=OFF -DESCARGOT_THREADING=ON -DESCARGOT_TEST=ON -G Ninja -DCMAKE_C_COMPILER=cl -DCMAKE_CXX_COMPILER=cl -DCMAKE_BUILD_TYPE=release
         CMake --build out/win64_release_ninja/ --config Release
         .\out\win64_release_ninja\escargot.exe run.js
     - if: ${{ failure() }}
diff --git a/src/util/SpinLock.h b/src/util/SpinLock.h
index d2daf73c5..d005fa778 100644
--- a/src/util/SpinLock.h
+++ b/src/util/SpinLock.h
@@ -31,7 +31,11 @@ class SpinLock {
 
 public:
     SpinLock()
+#if defined(COMPILER_MSVC)
+        : m_locked()
+#else
         : m_locked(ATOMIC_FLAG_INIT)
+#endif
     {
     }
 
diff --git a/third_party/GCutil b/third_party/GCutil
index 0d6fe0e6d..c4804a317 160000
--- a/third_party/GCutil
+++ b/third_party/GCutil
@@ -1 +1 @@
-Subproject commit 0d6fe0e6da3ef58b60554d425bf141f63997bc03
+Subproject commit c4804a317fa3cc481279f1724ede5c53439b06dc