diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -469,7 +469,9 @@ class ui(object):
             except error.ParseError as inst:
                 if trusted:
                     raise
-                self.warn(_(b'ignored: %s\n') % stringutil.forcebytestr(inst))
+                self.warn(
+                    _(b'ignored %s: %s\n') % (inst.location, inst.message)
+                )
 
         self._applyconfig(cfg, trusted, root)
 
diff --git a/tests/test-trusted.py.out b/tests/test-trusted.py.out
--- a/tests/test-trusted.py.out
+++ b/tests/test-trusted.py.out
@@ -174,7 +174,7 @@ quux
 # parse error
 # different user, different group
 not trusting file .hg/hgrc from untrusted user abc, group def
-ignored: ('foo', '.hg/hgrc:1')
+ignored .hg/hgrc:1: foo
 # same user, same group
 hg: parse error at .hg/hgrc:1: foo