diff --git a/.github/workflows/test-llvm.yml b/.github/workflows/test-llvm.yml
index 9633a5e..d9a0d5c 100644
--- a/.github/workflows/test-llvm.yml
+++ b/.github/workflows/test-llvm.yml
@@ -41,7 +41,13 @@ jobs:
 
   test-llvm:
     needs: [prepare]
-    runs-on: windows-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        arch:
+          - x86_64
+          - aarch64
+    runs-on: ${{startsWith(matrix.arch, 'a') && 'windows-11-arm' || 'windows-latest'}}
     steps:
       - name: Install dependencies
         run: |
@@ -54,7 +60,7 @@ jobs:
           commit: ${{inputs.commit}}
           branch: ${{inputs.branch}}
           event: ${{inputs.pipeline_type}}
-          name: windows-ucrt-x86_64-toolchain
+          name: windows-ucrt-${{matrix.arch}}-toolchain
       - name: Unpack toolchain
         run: |
           Expand-Archive llvm-mingw-*.zip -DestinationPath .
@@ -80,7 +86,10 @@ jobs:
           cmake ../llvm `
             -G Ninja `
             -DCMAKE_BUILD_TYPE=Release `
-            -DLLVM_TARGETS_TO_BUILD=X86 `
+            -DLLVM_HOST_TRIPLE=${{matrix.arch}}-w64-windows-gnu `
+            -DCMAKE_SYSTEM_PROCESSOR=${{matrix.arch}} `
+            -DCMAKE_SYSTEM_NAME=Windows `
+            -DLLVM_TARGETS_TO_BUILD="AArch64;X86" `
             -DLLVM_ENABLE_PROJECTS="clang;lld;clang-tools-extra" `
             -DLLVM_WINDOWS_PREFER_FORWARD_SLASH=OFF `
             -DCMAKE_C_COMPILER=clang `