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
@@ -1,67 +1,212 @@
 # same user, same group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # same user, different group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # different user, same group
-Not reading file .hg/hgrc from untrusted user abc, group bar
+Not trusting file .hg/hgrc from untrusted user abc, group bar
+trusted
     global = /some/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # different user, same group, but we trust the group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # different user, different group
-Not reading file .hg/hgrc from untrusted user abc, group def
+Not trusting file .hg/hgrc from untrusted user abc, group def
+trusted
     global = /some/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # different user, different group, but we trust the user
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # different user, different group, but we trust the group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # different user, different group, but we trust the user and the group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # we trust all users
 # different user, different group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # we trust all groups
 # different user, different group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # we trust all users and groups
 # different user, different group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # we don't get confused by users and groups with the same name
 # different user, different group
-Not reading file .hg/hgrc from untrusted user abc, group def
+Not trusting file .hg/hgrc from untrusted user abc, group def
+trusted
     global = /some/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # list of user names
 # different user, different group, but we trust the user
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # list of group names
 # different user, different group, but we trust the group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
 # Can't figure out the name of the user running this process
 # different user, different group
+trusted
     global = /some/path
+    interpolated = /some/path/another/path
     local = /another/path
+untrusted
+. . global = /some/path
+. . interpolated = /some/path/another/path
+. . local = /another/path
 
+# prints debug warnings
+# different user, different group
+Not trusting file .hg/hgrc from untrusted user abc, group def
+trusted
+Ignoring untrusted configuration option paths.interpolated = /some/path/another/path
+Ignoring untrusted configuration option paths.local = /another/path
+    global = /some/path
+untrusted
+. . global = /some/path
+.Ignoring untrusted configuration option paths.interpolated = /some/path/another/path
+ . interpolated = /some/path/another/path
+.Ignoring untrusted configuration option paths.local = /another/path
+ . local = /another/path
+
+# ui.readsections
+quux
+
+# read trusted, untrusted, new ui, trusted
+Not trusting file foobar from untrusted user abc, group def
+trusted:
+Ignoring untrusted configuration option foobar.baz = quux
+None
+/some/path/another/path
+untrusted:
+quux
+/some/path/another/path
+
+# error handling
+# file doesn't exist
+# same user, same group
+# different user, different group
+
+# parse error
+# different user, different group
+Not trusting file .hg/hgrc from untrusted user abc, group def
+Ignored: Failed to parse .hg/hgrc
+File contains no section headers.
+file: .hg/hgrc, line: 1
+'foo = bar'
+# same user, same group
+raised Abort
+
+# interpolation error
+# same user, same group
+# regular config:
+  trusted raised Abort
+untrusted raised Abort
+# different user, different group
+Not trusting file .hg/hgrc from untrusted user abc, group def
+  trusted Ignored: Error in configuration section [foo] parameter 'bar':
+bad interpolation variable reference '%('
+ None
+untrusted raised Abort
+# configitems:
+  trusted Ignored: Error in configuration section [foo]:
+bad interpolation variable reference '%('
+ []
+untrusted raised Abort