diff --git a/Tools/autotest/param_metadata/jsonemit.py b/Tools/autotest/param_metadata/jsonemit.py
index d1077bee6b..36212197e2 100644
--- a/Tools/autotest/param_metadata/jsonemit.py
+++ b/Tools/autotest/param_metadata/jsonemit.py
@@ -12,7 +12,6 @@ class JSONEmit(Emit):
         json_fname = 'apm.pdef.json'
         self.f = open(json_fname, mode='w')
         self.content = {"json": {"version": 0}}
-        self.name = ''
 
     def close(self):
         json.dump(self.content, self.f, indent=2, sort_keys=True)
@@ -33,7 +32,7 @@ class JSONEmit(Emit):
         # Copy content to avoid any modification
         g = copy.deepcopy(g)
 
-        self.content[self.name] = {}
+        self.content[g.name] = {}
 
         # Check all params available
         for param in g.params:
@@ -97,4 +96,4 @@ class JSONEmit(Emit):
 
         # Update main content with actual content
         for key in content:
-            self.content[self.name][key] = content[key]
+            self.content[g.name][key] = content[key]