diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ffa51e0..43bf82f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -39,15 +39,25 @@ jobs:
       - run: ${{ matrix.platform.make }} ${{ matrix.target }}-package
 
       # Production testing
-      - name: Install extension
-        shell: bash
+      - name: Install VSIX extension
+        if: runner.os == 'macOS'
+        run: >
+          ./build/test/vscode/.vscode-test/vscode-*/Visual\ Studio\ Code.app/Contents/Resources/app/bin/code
+          --extensions-dir build/test/vscode/.vscode-test/extensions
+          --install-extension build/dist/sourcemeta-studio-vscode.vsix
+      - name: Install VSIX extension
+        if: runner.os == 'Linux'
+        run: >
+          ./build/test/vscode/.vscode-test/vscode-*/bin/code
+          --extensions-dir build/test/vscode/.vscode-test/extensions
+          --install-extension build/dist/sourcemeta-studio-vscode.vsix
+      - name: Install VSIX extension
+        if: runner.os == 'Windows'
         run: |
-          rm -rf build/test/vscode/.vscode-test/extensions
-          mkdir -p build/test/vscode/.vscode-test/extensions/sourcemeta.studio
-          unzip build/dist/sourcemeta-studio-vscode.vsix 'extension/*' -d build/test/vscode/.vscode-test/extensions/sourcemeta.studio
-          mv build/test/vscode/.vscode-test/extensions/sourcemeta.studio/extension/* build/test/vscode/.vscode-test/extensions/sourcemeta.studio/
-          rmdir build/test/vscode/.vscode-test/extensions/sourcemeta.studio/extension
-          node test/vscode/generate-extensions.js build/test/vscode/.vscode-test/extensions/sourcemeta.studio > build/test/vscode/.vscode-test/extensions/extensions.json
+          $VSCODE_DIR = Get-ChildItem -Path build/test/vscode/.vscode-test -Directory -Filter 'vscode-*' | Select-Object -First 1
+          & "$VSCODE_DIR\bin\code.cmd" --extensions-dir build/test/vscode/.vscode-test/extensions --install-extension build/dist/sourcemeta-studio-vscode.vsix
+        shell: pwsh
+
       - if: runner.os == 'Linux'
         run: xvfb-run --auto-servernum ${{ matrix.platform.make }} ${{ matrix.target }}-test
         env:
diff --git a/test/vscode/generate-extensions.js b/test/vscode/generate-extensions.js
deleted file mode 100755
index 26a243d..0000000
--- a/test/vscode/generate-extensions.js
+++ /dev/null
@@ -1,40 +0,0 @@
-#!/usr/bin/env node
-const fs = require('fs');
-const path = require('path');
-
-if (process.argv.length !== 3) {
-  console.error('Usage: generate-extensions.js <extension-directory>');
-  process.exit(1);
-}
-
-const extensionDir = process.argv[2];
-const packageJsonPath = path.join(extensionDir, 'package.json');
-
-if (!fs.existsSync(packageJsonPath)) {
-  console.error(`Error: package.json not found at ${packageJsonPath}`);
-  process.exit(1);
-}
-
-const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
-const extensionId = `${packageJson.publisher}.${packageJson.name}`;
-const extensionDirName = path.basename(extensionDir);
-
-const extensionsJson = [{
-  identifier: {
-    id: extensionId
-  },
-  version: packageJson.version,
-  location: {
-    $mid: 1,
-    path: `/${extensionDirName}`,
-    scheme: 'file'
-  },
-  relativeLocation: extensionDirName,
-  metadata: {
-    isApplicationScoped: false,
-    isBuiltin: false,
-    isSystem: false
-  }
-}];
-
-console.log(JSON.stringify(extensionsJson));