diff -r d813132ea361 -r 77e566fe31ec mercurial/ui.py
--- a/mercurial/ui.py	Sun Mar 27 20:59:36 2016 +0900
+++ b/mercurial/ui.py	Sun Mar 27 21:05:55 2016 +0900
@@ -192,6 +192,9 @@
         if self.plain('revsetalias'):
             for k, v in cfg.items('revsetalias'):
                 del cfg['revsetalias'][k]
+        if self.plain('templatealias'):
+            for k, v in cfg.items('templatealias'):
+                del cfg['templatealias'][k]
 
         if trusted:
             self._tcfg.update(cfg)