diff --git a/InvenTree/plugin/__init__.py b/InvenTree/plugin/__init__.py
index ae38ae6e5b..2f08d31eed 100644
--- a/InvenTree/plugin/__init__.py
+++ b/InvenTree/plugin/__init__.py
@@ -10,7 +10,7 @@ __all__ = [
     'registry',
 
     'InvenTreePlugin',
-    IntegrationPluginBase,
+    'IntegrationPluginBase',
     'MixinNotImplementedError',
     'MixinImplementationError',
 ]
diff --git a/InvenTree/plugin/base/label/mixins.py b/InvenTree/plugin/base/label/mixins.py
index b6c4d53f46..4e06f9e15a 100644
--- a/InvenTree/plugin/base/label/mixins.py
+++ b/InvenTree/plugin/base/label/mixins.py
@@ -36,4 +36,4 @@ class LabelPrintingMixin:
         """
 
         # Unimplemented (to be implemented by the particular plugin class)
-        MixinNotImplementedError('This Plugin must implement a `print_label` method')
+        raise MixinNotImplementedError('This Plugin must implement a `print_label` method')
diff --git a/InvenTree/plugin/events.py b/InvenTree/plugin/events.py
index 193a1805fe..bea1fafb25 100644
--- a/InvenTree/plugin/events.py
+++ b/InvenTree/plugin/events.py
@@ -5,5 +5,5 @@ Import helper for events
 from plugin.base.event.events import trigger_event
 
 __all__ = [
-    trigger_event,
+    'trigger_event',
 ]
diff --git a/InvenTree/plugin/test_plugin.py b/InvenTree/plugin/test_plugin.py
index 30054d569b..5de813150f 100644
--- a/InvenTree/plugin/test_plugin.py
+++ b/InvenTree/plugin/test_plugin.py
@@ -87,7 +87,7 @@ class InvenTreePluginTests(TestCase):
             AUTHOR = 'AA BB'
             DESCRIPTION = 'A description'
             VERSION = '1.2.3a'
-            WEBSITE = 'http://aa.bb/cc'
+            WEBSITE = 'https://aa.bb/cc'
             LICENSE = 'MIT'
 
         self.plugin_name = NameInvenTreePlugin()
@@ -147,7 +147,7 @@ class InvenTreePluginTests(TestCase):
         # website
         self.assertEqual(self.plugin.website, None)
         self.assertEqual(self.plugin_simple.website, None)
-        self.assertEqual(self.plugin_name.website, 'http://aa.bb/cc')
+        self.assertEqual(self.plugin_name.website, 'https://aa.bb/cc')
 
         # license
         self.assertEqual(self.plugin.license, None)