diff --git a/.github/workflows/check-npm-task.yml b/.github/workflows/check-npm-task.yml
index 5ea5e21..c14ec5a 100644
--- a/.github/workflows/check-npm-task.yml
+++ b/.github/workflows/check-npm-task.yml
@@ -30,8 +30,15 @@ permissions:
 
 jobs:
   validate:
+    name: validate (${{ matrix.project.path }})
     runs-on: ubuntu-latest
 
+    strategy:
+      fail-fast: false
+      matrix:
+        project:
+          - path: .
+
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -48,7 +55,11 @@ jobs:
           version: 3.x
 
       - name: Validate package.json
-        run: task --silent npm:validate
+        run: |
+          task \
+            --silent \
+            npm:validate \
+            PROJECT_PATH="${{ matrix.project.path }}"
 
   check-sync:
     name: check-sync (${{ matrix.project.path }})
diff --git a/Taskfile.yml b/Taskfile.yml
index e188e9f..f4c1fc0 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -252,7 +252,10 @@ tasks:
 
   # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-npm-task/Taskfile.yml
   npm:validate:
-    desc: Validate npm configuration files against their JSON schema
+    desc: |
+      Validate npm configuration files against their JSON schema.
+      Environment variable parameters:
+      PROJECT_PATH: Path of the npm-managed project (default: {{.DEFAULT_NPM_PROJECT_PATH}}).
     vars:
       # Source: https://github.com/SchemaStore/schemastore/blob/master/src/schemas/json/package.json
       SCHEMA_URL: https://json.schemastore.org/package.json
@@ -294,7 +297,8 @@ tasks:
       STYLELINTRC_SCHEMA_URL: https://json.schemastore.org/stylelintrc.json
       STYLELINTRC_SCHEMA_PATH:
         sh: task utility:mktemp-file TEMPLATE="stylelintrc-schema-XXXXXXXXXX.json"
-      INSTANCE_PATH: "package.json"
+      INSTANCE_PATH: >-
+        {{default .DEFAULT_NPM_PROJECT_PATH .PROJECT_PATH}}/package.json
       PROJECT_FOLDER:
         sh: pwd
       WORKING_FOLDER: