--- a/build/util/count_ctors.py
+++ b/build/util/count_ctors.py
@@ -49,16 +49,16 @@ def count_ctors(filename):
 
 if __name__ == '__main__':
     for f in sys.argv[1:]:
         perfherder_data = {
             "framework": {"name": "build_metrics"},
             "suites": [{
                 "name": "compiler_metrics",
                 "subtests": [{
-                    "name": "num_constructors",
+                    "name": "num_static_constructors",
                     "value": count_ctors(f),
                     "alertThreshold": 0.25
                 }]}
             ]
         }
         print "PERFHERDER_DATA: %s" % json.dumps(perfherder_data)