diff --git a/django/db/backends/mysql/creation.py b/django/db/backends/mysql/creation.py
index e51de0faa1..c9330819e5 100644
--- a/django/db/backends/mysql/creation.py
+++ b/django/db/backends/mysql/creation.py
@@ -26,7 +26,7 @@ class DatabaseCreation(BaseDatabaseCreation):
                 self.log('Got an error creating the test database: %s' % e)
                 sys.exit(2)
             else:
-                raise e
+                raise
 
     def _clone_test_db(self, suffix, verbosity, keepdb=False):
         source_database_name = self.connection.settings_dict['NAME']
diff --git a/django/db/backends/postgresql/creation.py b/django/db/backends/postgresql/creation.py
index 09af818b1e..0cb26a4341 100644
--- a/django/db/backends/postgresql/creation.py
+++ b/django/db/backends/postgresql/creation.py
@@ -48,7 +48,7 @@ class DatabaseCreation(BaseDatabaseCreation):
             elif not keepdb:
                 # If the database should be kept, ignore "database already
                 # exists".
-                raise e
+                raise
 
     def _clone_test_db(self, suffix, verbosity, keepdb=False):
         # CREATE DATABASE ... WITH TEMPLATE ... requires closing connections
diff --git a/django/db/migrations/loader.py b/django/db/migrations/loader.py
index 6be8048299..09a58d1e24 100644
--- a/django/db/migrations/loader.py
+++ b/django/db/migrations/loader.py
@@ -269,7 +269,7 @@ class MigrationLoader:
                         ),
                         exc.node
                     ) from exc
-            raise exc
+            raise
         self.graph.ensure_not_cyclic()
 
     def check_consistent_history(self, connection):
diff --git a/django/db/models/query.py b/django/db/models/query.py
index f8be008a62..005fde44c6 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -607,13 +607,13 @@ class QuerySet:
                 params = dict(resolve_callables(params))
                 obj = self.create(**params)
             return obj, True
-        except IntegrityError as e:
+        except IntegrityError:
             try:
                 qs = self.select_for_update() if lock else self
                 return qs.get(**lookup), False
             except self.model.DoesNotExist:
                 pass
-            raise e
+            raise
 
     def _extract_model_params(self, defaults, **kwargs):
         """