diff --git a/biggraphite/drivers/elasticsearch.py b/biggraphite/drivers/elasticsearch.py
index a7a4884846..f87b9ea53d 100644
--- a/biggraphite/drivers/elasticsearch.py
+++ b/biggraphite/drivers/elasticsearch.py
@@ -580,8 +580,6 @@ def glob_metrics(self, glob, start_time=None, end_time=None):
         super(_ElasticSearchAccessor, self).glob_metrics(glob, start_time, end_time)
 
         tracing.add_attr_to_trace("glob", str(glob))
-        tracing.add_attr_to_trace("time.start", str(start_time))
-        tracing.add_attr_to_trace("time.stop", str(end_time))
 
         if glob == "":
             return []
@@ -637,8 +635,6 @@ def glob_directory_names(self, glob, start_time=None, end_time=None):
             glob, start_time, end_time
         )
         tracing.add_attr_to_trace("glob", str(glob))
-        tracing.add_attr_to_trace("time.start", str(start_time))
-        tracing.add_attr_to_trace("time.stop", str(end_time))
 
         if glob == "":
             return []
diff --git a/biggraphite/tracing.py b/biggraphite/tracing.py
index bf6d4ad4ae..340d6d2f33 100644
--- a/biggraphite/tracing.py
+++ b/biggraphite/tracing.py
@@ -37,8 +37,8 @@ def trace(func):
         return func
 
     def tracer(self, *args, **kwargs):
-        _tracer = get_bg_trace(self, func)
-        with _tracer.span(name="%s.%s" % (self.module_name, func.__name__)):
+        tracer = get_bg_trace(self, func)
+        with tracer.span(name="%s.%s" % (self.module_name, func.__name__)):
             return func(self, *args, **kwargs)
     return tracer
 
@@ -58,7 +58,7 @@ def add_attr_to_trace(key, value):
     """Add an attribute to the current span if tracing is enabled."""
     if not execution_context:
         pass
-    _tracer = execution_context.get_opencensus_tracer()
-    _tracer.add_attribute_to_current_span(
+    tracer = execution_context.get_opencensus_tracer()
+    tracer.add_attribute_to_current_span(
                 attribute_key=key,
                 attribute_value=value)