Try npm install-strategy=nested

.github/workflows/storybook-check.yml

@@ -39,7 +39,9 @@ jobs:
 
             - name: Install test-runner and Playwright dependencies
               run: |
-                  npm install --no-save @storybook/test-runner@0.24.2
+                  # storybook and playwright are needed as peer dependencies of @storybook/test-runner for pnpm
+                  STORYBOOK_VERSION=$(node -p "require('./storybook/package.json').devDependencies.storybook")
+                  npm install --no-save "storybook@$STORYBOOK_VERSION" @storybook/test-runner@0.24.2 playwright
                   npx playwright install --with-deps
 
             - name: Serve Storybook and run tests

.npmrc

@@ -1,5 +1,6 @@
 save-exact = true
 engine-strict = true
 legacy-peer-deps = true
-prefer-dedupe = true
 lockfile-version = 3
+install-strategy = "nested"
+strict-peer-deps = true

bin/test-create-block.sh

@@ -75,6 +75,10 @@ module.exports = {
 };
 EOF
 
+# Set NODE_PATH so wp-scripts can find its dependencies (e.g., webpack) which
+# may not be hoisted to root node_modules with nested install strategies.
+export NODE_PATH="../packages/scripts/node_modules:$NODE_PATH"
+
 status "Formatting files..."
 ../node_modules/.bin/wp-scripts format