diff --git a/sopel/modules/bugzilla.py b/sopel/modules/bugzilla.py
index 675c5109ce..1eca770663 100644
--- a/sopel/modules/bugzilla.py
+++ b/sopel/modules/bugzilla.py
@@ -14,11 +14,9 @@
 import requests
 import xmltodict
 
+from sopel import plugin, plugins
 from sopel.config.types import ListAttribute, StaticSection
-from sopel.module import rule
 
-
-regex = None
 LOGGER = logging.getLogger(__name__)
 
 
@@ -42,34 +40,35 @@ def configure(config):
 
 
 def setup(bot):
-    global regex
     bot.config.define_section('bugzilla', BugzillaSection)
 
-    if not bot.config.bugzilla.domains:
-        return
 
-    domains = '|'.join(bot.config.bugzilla.domains)
-    regex = re.compile((r'https?://(%s)'
-                        r'(/show_bug.cgi\?\S*?)'
-                        r'(id=\d+)')
-                       % domains)
-    bot.register_url_callback(regex, show_bug)
+def _bugzilla_loader(settings):
+    if not settings.bugzilla.domains:
+        raise plugins.exceptions.ImproperlyConfigured(
+            'Bugzilla URL callback requires '
+            '"bugzilla.domains" to be configured; check your config file.')
+
+    domain_pattern = '|'.join(
+        re.escape(domain)
+        for domain in settings.bugzilla.domains)
 
+    pattern = (
+        r'https?://(%s)'
+        r'(/show_bug.cgi\?\S*?)'
+        r'(id=\d+).*'
+    ) % domain_pattern
 
-def shutdown(bot):
-    bot.unregister_url_callback(regex, show_bug)
+    return [re.compile(pattern)]
 
 
-@rule(r'.*https?://(\S+?)'
-      r'(/show_bug.cgi\?\S*?)'
-      r'(id=\d+).*')
+@plugin.url_lazy(_bugzilla_loader)
 def show_bug(bot, trigger, match=None):
     """Show information about a Bugzilla bug."""
-    match = match or trigger
-    domain = match.group(1)
+    domain = trigger.group(1)
     if domain not in bot.config.bugzilla.domains:
         return
-    url = 'https://%s%sctype=xml&%s' % match.groups()
+    url = 'https://%s%sctype=xml&%s' % trigger.groups()
     data = requests.get(url).content
     bug = xmltodict.parse(data).get('bugzilla').get('bug')
     error = bug.get('@error', None)  # error="NotPermitted"
diff --git a/sopel/modules/wikipedia.py b/sopel/modules/wikipedia.py
index ecbde88082..2f69b5be0a 100644
--- a/sopel/modules/wikipedia.py
+++ b/sopel/modules/wikipedia.py
@@ -13,7 +13,7 @@
 from requests import get
 
 from sopel.config.types import StaticSection, ValidatedAttribute
-from sopel.module import commands, example, NOLIMIT, url
+from sopel.module import commands, example, NOLIMIT, output_prefix, url
 from sopel.tools.web import quote, unquote
 
 try:  # TODO: Remove fallback when dropping py2
@@ -133,9 +133,9 @@ def say_snippet(bot, trigger, server, query, show_url=True):
         snippet = mw_snippet(server, query)
     except KeyError:
         if show_url:
-            bot.say("[WIKIPEDIA] Error fetching snippet for \"{}\".".format(page_name))
+            bot.say("Error fetching snippet for \"{}\".".format(page_name))
         return
-    msg = '[WIKIPEDIA] {} | "{}"'.format(page_name, snippet)
+    msg = '{} | "{}"'.format(page_name, snippet)
     msg_url = msg + ' | https://{}/wiki/{}'.format(server, query)
     if msg_url == trigger:  # prevents triggering on another instance of Sopel
         return
@@ -166,10 +166,10 @@ def say_section(bot, trigger, server, query, section):
 
     snippet = mw_section(server, query, section)
     if not snippet:
-        bot.say("[WIKIPEDIA] Error fetching section \"{}\" for page \"{}\".".format(section, page_name))
+        bot.say("Error fetching section \"{}\" for page \"{}\".".format(section, page_name))
         return
 
-    msg = '[WIKIPEDIA] {} - {} | "{}"'.format(page_name, section.replace('_', ' '), snippet)
+    msg = '{} - {} | "{}"'.format(page_name, section.replace('_', ' '), snippet)
     bot.say(msg)
 
 
@@ -217,6 +217,7 @@ def mw_section(server, query, section):
 
 # Matches a wikipedia page (excluding spaces and #, but not /File: links), with a separate optional field for the section
 @url(r'https?:\/\/([a-z]+\.wikipedia\.org)\/wiki\/((?!File\:)[^ #]+)#?([^ ]*)')
+@output_prefix('[WIKIPEDIA] ')
 def mw_info(bot, trigger, match=None):
     """Retrieves and outputs a snippet of the linked page."""
     if match.group(3):
@@ -230,6 +231,7 @@ def mw_info(bot, trigger, match=None):
 
 @commands('w', 'wiki', 'wik')
 @example('.w San Francisco')
+@output_prefix('[WIKIPEDIA] ')
 def wikipedia(bot, trigger):
     lang = bot.config.wikipedia.default_lang
 
diff --git a/sopel/plugins/exceptions.py b/sopel/plugins/exceptions.py
index 8fa2e890f0..5d3ae15f25 100644
--- a/sopel/plugins/exceptions.py
+++ b/sopel/plugins/exceptions.py
@@ -16,3 +16,12 @@ def __init__(self, name):
         message = 'Plugin "%s" not registered' % name
         self.plugin_name = name
         super(PluginNotRegistered, self).__init__(message)
+
+
+class ImproperlyConfigured(PluginError):
+    """Exception raised when a plugin is not properly configured.
+
+    This can be used in any place where a plugin requires a specific config,
+    for example in its ``setup`` function, in any of its rules or commands,
+    and in the loader function for the :func:`sopel.plugin.url_lazy` decorator.
+    """