diff --git a/ref-test/app/tools/data.py b/ref-test/app/tools/data.py
index 778c05a..7eab4d9 100644
--- a/ref-test/app/tools/data.py
+++ b/ref-test/app/tools/data.py
@@ -18,12 +18,10 @@ def check_is_json(file):
     if not '.' in file.filename or not file.filename.rsplit('.',1)[-1] == 'json': return False
     return True
 
-def validate_json(file):
-    file.stream.seek(0)
-    data = json.loads(file.read())
+def validate_json(data):
     if not isinstance(data, list): return False
     for block in data:
-        block_type = block.pop('type', None)
+        block_type = block.get('type', None)
         if block_type not in ['block', 'question']: return False
         if block_type == 'question':
             if not all (key in block for key in ['q_no', 'text', 'options', 'correct', 'q_type', 'tags']): return False