diff --git a/InvenTree/plugin/base/action/mixins.py b/InvenTree/plugin/base/action/mixins.py
index 540859f2b4..b978a69189 100644
--- a/InvenTree/plugin/base/action/mixins.py
+++ b/InvenTree/plugin/base/action/mixins.py
@@ -12,6 +12,7 @@ class ActionMixin:
         MIXIN_NAME = 'Actions'
 
     def __init__(self):
+        """Register mixin."""
         super().__init__()
         self.add_mixin('action', True, __class__)
 
diff --git a/InvenTree/plugin/base/barcodes/mixins.py b/InvenTree/plugin/base/barcodes/mixins.py
index e57d67d5fd..5ba90d7157 100644
--- a/InvenTree/plugin/base/barcodes/mixins.py
+++ b/InvenTree/plugin/base/barcodes/mixins.py
@@ -40,6 +40,7 @@ class BarcodeMixin:
         MIXIN_NAME = 'Barcode'
 
     def __init__(self):
+        """Register mixin."""
         super().__init__()
         self.add_mixin('barcode', 'has_barcode', __class__)
 
diff --git a/InvenTree/plugin/base/label/mixins.py b/InvenTree/plugin/base/label/mixins.py
index 7fac8a4971..268f3e063f 100644
--- a/InvenTree/plugin/base/label/mixins.py
+++ b/InvenTree/plugin/base/label/mixins.py
@@ -17,6 +17,7 @@ class LabelPrintingMixin:
         MIXIN_NAME = 'Label printing'
 
     def __init__(self):  # pragma: no cover
+        """Register mixin."""
         super().__init__()
         self.add_mixin('labels', True, __class__)
 
diff --git a/InvenTree/plugin/builtin/action/simpleactionplugin.py b/InvenTree/plugin/builtin/action/simpleactionplugin.py
index e9a77a86b9..af4b404764 100644
--- a/InvenTree/plugin/builtin/action/simpleactionplugin.py
+++ b/InvenTree/plugin/builtin/action/simpleactionplugin.py
@@ -11,13 +11,16 @@ class SimpleActionPlugin(ActionMixin, InvenTreePlugin):
     ACTION_NAME = "simple"
 
     def perform_action(self, user=None, data=None):
+        """Sample method."""
         print("Action plugin in action!")
 
     def get_info(self, user, data=None):
+        """Sample method."""
         return {
             "user": user.username,
             "hello": "world",
         }
 
     def get_result(self, user=None, data=None):
+        """Sample method."""
         return True
diff --git a/InvenTree/plugin/builtin/barcodes/inventree_barcode.py b/InvenTree/plugin/builtin/barcodes/inventree_barcode.py
index e21684e1ee..52e97ddbd6 100644
--- a/InvenTree/plugin/builtin/barcodes/inventree_barcode.py
+++ b/InvenTree/plugin/builtin/barcodes/inventree_barcode.py
@@ -18,12 +18,14 @@ from stock.models import StockItem, StockLocation
 
 
 class InvenTreeBarcodePlugin(BarcodeMixin, InvenTreePlugin):
+    """Builtin BarcodePlugin for matching and generating internal barcodes."""
 
     NAME = "InvenTreeBarcode"
 
     def validate(self):
-        """An "InvenTree" barcode must be a jsonnable-dict with the following tags:
+        """Validate a barcode.
 
+        An "InvenTree" barcode must be a jsonnable-dict with the following tags:
         {
             'tool': 'InvenTree',
             'version': <anything>
@@ -52,7 +54,7 @@ class InvenTreeBarcodePlugin(BarcodeMixin, InvenTreePlugin):
         return True
 
     def getStockItem(self):
-
+        """Lookup StockItem by 'stockitem' key in barcode data."""
         for k in self.data.keys():
             if k.lower() == 'stockitem':
 
@@ -81,7 +83,7 @@ class InvenTreeBarcodePlugin(BarcodeMixin, InvenTreePlugin):
         return None
 
     def getStockLocation(self):
-
+        """Lookup StockLocation by 'stocklocation' key in barcode data."""
         for k in self.data.keys():
             if k.lower() == 'stocklocation':
 
@@ -109,7 +111,7 @@ class InvenTreeBarcodePlugin(BarcodeMixin, InvenTreePlugin):
         return None
 
     def getPart(self):
-
+        """Lookup Part by 'part' key in barcode data."""
         for k in self.data.keys():
             if k.lower() == 'part':
 
diff --git a/InvenTree/plugin/builtin/integration/core_notifications.py b/InvenTree/plugin/builtin/integration/core_notifications.py
index 9358eb3a61..d5c3cffd51 100644
--- a/InvenTree/plugin/builtin/integration/core_notifications.py
+++ b/InvenTree/plugin/builtin/integration/core_notifications.py
@@ -11,7 +11,13 @@ from plugin.mixins import BulkNotificationMethod, SettingsMixin
 
 
 class PlgMixin:
+    """Mixin to access plugin easier.
+
+    This needs to be spit out to reference the class. Perks of python.
+    """
+
     def get_plugin(self):
+        """Return plugin reference."""
         return CoreNotificationsPlugin
 
 
@@ -32,6 +38,8 @@ class CoreNotificationsPlugin(SettingsMixin, InvenTreePlugin):
     }
 
     class EmailNotification(PlgMixin, BulkNotificationMethod):
+        """Notificationmethod for delivery via Email."""
+
         METHOD_NAME = 'mail'
         METHOD_ICON = 'fa-envelope'
         CONTEXT_EXTRA = [
@@ -62,6 +70,7 @@ class CoreNotificationsPlugin(SettingsMixin, InvenTreePlugin):
             )
 
         def send_bulk(self):
+            """Send the notifications out via email."""
             html_message = render_to_string(self.context['template']['html'], self.context)
             targets = self.targets.values_list('email', flat=True)