diff --git a/.github/workflows/validate-json.yaml b/.github/workflows/validate-json.yaml
index 46a3e66d..4b244a26 100644
--- a/.github/workflows/validate-json.yaml
+++ b/.github/workflows/validate-json.yaml
@@ -1,4 +1,4 @@
-# Validate JSON files
+# Validate JSON schema files
 # Source: https://github.com/nhalstead/validate-json-action
 # Forked from: https://github.com/marketplace/actions/validate-json
 name: Validate JSON schemas for assets and materials
@@ -18,7 +18,9 @@ jobs:
         with:
           schema: ./schemas/asset_schema.json
           jsons: ./examples/*_asset.xoma
-          
-          
-#          ,./examples/*.xomp       
- 
\ No newline at end of file
+      - name: Validate "material" JSONs
+        uses: nhalstead/validate-json-action@0.1.3
+        with:
+          schema: ./schemas/material_schema.json
+          jsons: ./examples/*_material.xomp
+          
\ No newline at end of file