diff --git a/.github/workflows/check-schema.yml b/.github/workflows/check-schema.yml
new file mode 100644
index 0000000..ccfe351
--- /dev/null
+++ b/.github/workflows/check-schema.yml
@@ -0,0 +1,27 @@
+name: Check schema
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+    branches:
+      - main
+      - master
+
+jobs:
+  check-schema:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Get schema.json from latest release
+        run: |
+          URL=`curl -s https://api.github.com/repos/jaoafa/pat-star-systems/releases/latest | grep "browser_download_url.*json\"" | cut -d : -f 2,3 | tr -d \"`
+          curl -L -o schema.json $URL
+
+      - name: Check schema
+        run: |
+          pip install jsonschema
+          find stella -name "*.pas" | xargs -I{} jsonschema -i {} schema.json
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 4bc64a9..673b35b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -63,7 +63,6 @@ jobs:
 
       - name: Create schema
         run: |
-          mkdir -p schema
           node ./.github/scripts/create-schema.js
           sha1sum -b schema.json > schema.json.sha1