diff --git a/expansion/schema_validation.py b/expansion/schema_validation.py
index eac832bcd..cb9d88996 100644
--- a/expansion/schema_validation.py
+++ b/expansion/schema_validation.py
@@ -128,7 +128,7 @@ def Validate(properties, schema_name, template_name, imports):
     if properties is None:
         properties = {}
 
-    schema = yaml.safe_load(raw_schema)
+    schema = yaml.safe_load(raw_schema['content'])
 
     # If the schema is empty, do nothing.
     if not schema: