diff --git a/IkiWiki/Plugin/openid.pm b/IkiWiki/Plugin/openid.pm
index 2933c9ed9..574c42f0e 100644
--- a/IkiWiki/Plugin/openid.pm
+++ b/IkiWiki/Plugin/openid.pm
@@ -191,13 +191,15 @@ sub openiduser ($) {
 	    eval q{use Net::OpenID::VerifiedIdentity; 1} && !$@) {
 		my $oid=Net::OpenID::VerifiedIdentity->new(identity => $user);
 		my $display=$oid->display;
-		# Convert "user.somehost.com" to "user [somehost.com]".
+		# Convert "user.somehost.com" to "user [somehost.com]"
+		# (also "user.somehost.co.uk")
 		if ($display !~ /\[/) {
-			$display=~s/^(.*?)\.([^.]+\.[a-z]+)$/$1 [$2]/;
+			$display=~s/^([-a-zA-Z0-9]+?)\.([-.a-zA-Z0-9]+\.[a-z]+)$/$1 [$2]/;
 		}
 		# Convert "http://somehost.com/user" to "user [somehost.com]".
+		# (also "https://somehost.com/user/")
 		if ($display !~ /\[/) {
-			$display=~s/^https?:\/\/(.+)\/([^\/]+)$/$2 [$1]/;
+			$display=~s/^https?:\/\/(.+)\/([^\/]+)\/?$/$2 [$1]/;
 		}
 		$display=~s!^https?://!!; # make sure this is removed
 		eval q{use CGI 'escapeHTML'};
diff --git a/t/openiduser.t b/t/openiduser.t
new file mode 100755
index 000000000..fe4d2b445
--- /dev/null
+++ b/t/openiduser.t
@@ -0,0 +1,30 @@
+#!/usr/bin/perl
+use warnings;
+use strict;
+
+BEGIN {
+	eval q{
+		use Net::OpenID::VerifiedIdentity;
+	};
+	if ($@) {
+		eval q{use Test::More skip_all => "Net::OpenID::VerifiedIdentity not available"};
+	}
+	else {
+		eval q{use Test::More tests => 9};
+	}
+	use_ok("IkiWiki::Plugin::openid");
+}
+
+# Some typical examples:
+
+is(IkiWiki::openiduser('http://josephturian.blogspot.com'), 'josephturian [blogspot.com]');
+is(IkiWiki::openiduser('http://yam655.livejournal.com/'), 'yam655 [livejournal.com]');
+is(IkiWiki::openiduser('http://id.mayfirst.org/jamie/'), 'jamie [id.mayfirst.org]');
+
+# and some less typical ones taken from the ikiwiki commit history
+
+is(IkiWiki::openiduser('http://thm.id.fedoraproject.org/'), 'thm [id.fedoraproject.org]');
+is(IkiWiki::openiduser('http://dtrt.org/'), 'dtrt.org');
+is(IkiWiki::openiduser('http://alcopop.org/me/openid/'), 'openid [alcopop.org/me]');
+is(IkiWiki::openiduser('http://id.launchpad.net/882/bielawski1'), 'bielawski1 [id.launchpad.net/882]');
+is(IkiWiki::openiduser('http://technorati.com/people/technorati/drajt'), 'drajt [technorati.com/people/technorati]');