diff --git a/sopel/bot.py b/sopel/bot.py
index 5d644b7959..d4b31cef02 100644
--- a/sopel/bot.py
+++ b/sopel/bot.py
@@ -227,8 +227,7 @@ def setup(self):
 
     def reload_plugin(self, name):
         if name not in self._plugins:
-            # TODO: raise more specific exception
-            raise Exception('Plugin %s is not loaded' % name)
+            raise plugins.PluginNotRegistered(name)
 
         plugin = self._plugins[name]
         # tear down
@@ -270,8 +269,7 @@ def remove_plugin(self, plugin, callables, jobs, shutdowns, urls):
         """Remove a loaded plugin from the bot's registry"""
         name = plugin.name
         if name not in self._plugins:
-            # TODO: raise more specific exception
-            raise Exception('Plugin %s is not loaded' % name)
+            raise plugins.PluginNotRegistered(name)
 
         try:
             # remove commands, jobs, and shutdown functions
diff --git a/sopel/plugins/__init__.py b/sopel/plugins/__init__.py
index 143ec307b4..0facc0522e 100644
--- a/sopel/plugins/__init__.py
+++ b/sopel/plugins/__init__.py
@@ -31,6 +31,7 @@
 import os
 
 from . import handlers  # noqa
+from .exceptions import PluginError, PluginNotFound, PluginNotRegistered  # noqa
 
 
 def _list_plugin_filenames(directory):
diff --git a/sopel/plugins/exceptions.py b/sopel/plugins/exceptions.py
new file mode 100644
index 0000000000..d18110f482
--- /dev/null
+++ b/sopel/plugins/exceptions.py
@@ -0,0 +1,18 @@
+# coding=utf-8
+from __future__ import unicode_literals, absolute_import, print_function, division
+
+
+class PluginError(Exception):
+    pass
+
+
+class PluginNotFound(PluginError):
+    def __init__(self, name):
+        message = 'Plugin "%s" not found'
+        super(PluginError, self).__init__(message)
+
+
+class PluginNotRegistered(PluginError):
+    def __init__(self, name):
+        message = 'Plugin "%s" not registered'
+        super(PluginError, self).__init__(message)
diff --git a/test/test_bot.py b/test/test_bot.py
new file mode 100644
index 0000000000..d19e39f04b
--- /dev/null
+++ b/test/test_bot.py
@@ -0,0 +1,46 @@
+# coding=utf-8
+"""Tests for core ``sopel.bot`` module"""
+from __future__ import unicode_literals, absolute_import, print_function, division
+
+import pytest
+
+from sopel import bot, config, plugins
+
+
+@pytest.fixture
+def tmpconfig(tmpdir):
+    conf_file = tmpdir.join('conf.ini')
+    conf_file.write("\n".join([
+        "[core]",
+        "owner=testnick",
+        "nick = TestBot",
+        "enable = coretasks"
+        ""
+    ]))
+    return config.Config(conf_file.strpath)
+
+
+def test_remove_plugin_unregistered_plugin(tmpconfig):
+    sopel = bot.Sopel(tmpconfig, daemon=False)
+    plugin = sopel._plugins.get('coretasks')
+
+    assert plugin is not None, 'coretasks should be always loaded'
+
+    # Unregister the plugin
+    plugin.unregister(sopel)
+    # And now it must raises
+    with pytest.raises(plugins.PluginNotRegistered):
+        sopel.remove_plugin(plugin, [], [], [], [])
+
+
+def test_reload_plugin_unregistered_plugin(tmpconfig):
+    sopel = bot.Sopel(tmpconfig, daemon=False)
+    plugin = sopel._plugins.get('coretasks')
+
+    assert plugin is not None, 'coretasks should be always loaded'
+
+    # Unregister the plugin
+    plugin.unregister(sopel)
+    # And now it must raises
+    with pytest.raises(plugins.PluginNotRegistered):
+        sopel.reload_plugin(plugin.name)