diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 0bbab1cc07..b11b869c4a 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -1639,7 +1639,7 @@ class InventorySourceSerializer(UnifiedJobTemplateSerializer, InventorySourceOpt
 
     def validate_source_project(self, value):
         if value and value.scm_type == '':
-            raise serializers.ValidationError(_("Can not use manual project for SCM-based inventory."))
+            raise serializers.ValidationError(_("Cannot use manual project for SCM-based inventory."))
         return value
 
     def validate_source(self, value):
@@ -3420,7 +3420,7 @@ class ScheduleSerializer(BaseSerializer):
         if type(value) == InventorySource and value.source not in SCHEDULEABLE_PROVIDERS:
             raise serializers.ValidationError(_('Inventory Source must be a cloud resource.'))
         elif type(value) == Project and value.scm_type == '':
-            raise serializers.ValidationError(_('Manual Project can not have a schedule set.'))
+            raise serializers.ValidationError(_('Manual Project cannot have a schedule set.'))
         elif type(value) == InventorySource and value.source == 'scm' and value.update_on_project_update:
             raise serializers.ValidationError(_(
                 'Inventory sources with `update_on_project_update` cannot be scheduled. '
diff --git a/awx/main/management/commands/inventory_import.py b/awx/main/management/commands/inventory_import.py
index 4e6c0a66ee..a52d4e15cb 100644
--- a/awx/main/management/commands/inventory_import.py
+++ b/awx/main/management/commands/inventory_import.py
@@ -112,7 +112,7 @@ class AnsibleInventoryLoader(object):
         self.method = 'ansible-inventory backport'
 
         if not os.path.exists(abs_module_path):
-            raise ImproperlyConfigured('Can not find inventory module')
+            raise ImproperlyConfigured('Cannot find inventory module')
         logger.debug('Using backported ansible-inventory module: {}'.format(abs_module_path))
         return [abs_module_path, '-i', self.source]
 
@@ -128,7 +128,7 @@ class AnsibleInventoryLoader(object):
             kwargs['proot_temp_dir'] = self.source_dir
             cwd = self.source_dir
         else:
-            # we can not safely store tmp data in source dir or trust script contents
+            # we cannot safely store tmp data in source dir or trust script contents
             if env['AWX_PRIVATE_DATA_DIR']:
                 # If this is non-blank, file credentials are being used and we need access
                 private_data_dir = functioning_dir(env['AWX_PRIVATE_DATA_DIR'])
diff --git a/awx/main/tasks.py b/awx/main/tasks.py
index e260293142..76124276b2 100644
--- a/awx/main/tasks.py
+++ b/awx/main/tasks.py
@@ -1772,7 +1772,7 @@ class RunInventoryUpdate(BaseTask):
                 if str(env_k) not in env and str(env_k) not in settings.INV_ENV_VARIABLE_BLACKLIST:
                     env[str(env_k)] = unicode(inventory_update.source_vars_dict[env_k])
         elif inventory_update.source == 'file':
-            raise NotImplementedError('Can not update file sources through the task system.')
+            raise NotImplementedError('Cannot update file sources through the task system.')
         # add private_data_files
         env['AWX_PRIVATE_DATA_DIR'] = kwargs.get('private_data_dir', '')
         return env