diff --git a/tests/test_migrate.py b/tests/test_migrate.py
index 9a92271..a87663c 100644
--- a/tests/test_migrate.py
+++ b/tests/test_migrate.py
@@ -802,7 +802,7 @@ def test_migrate(mocker: MockerFixture):
         Migrate.diff_models(models_describe, old_models_describe, False)
     Migrate._merge_operators()
     if isinstance(Migrate.ddl, MysqlDDL):
-        expected_upgrade_operators = set(
+        expected_upgrade_operators = {
             "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200)",
             "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(100) NOT NULL",
             "ALTER TABLE `config` ADD `user_id` INT NOT NULL  COMMENT 'User'",
@@ -834,8 +834,8 @@ def test_migrate(mocker: MockerFixture):
             "ALTER TABLE `category` MODIFY COLUMN `created_at` DATETIME(6) NOT NULL  DEFAULT CURRENT_TIMESTAMP(6)",
             "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
             "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
-        )
-        expected_downgrade_operators = set(
+        }
+        expected_downgrade_operators = {
             "ALTER TABLE `category` MODIFY COLUMN `name` VARCHAR(200) NOT NULL",
             "ALTER TABLE `category` MODIFY COLUMN `slug` VARCHAR(200) NOT NULL",
             "ALTER TABLE `config` DROP COLUMN `user_id`",
@@ -866,7 +866,7 @@ def test_migrate(mocker: MockerFixture):
             "ALTER TABLE `user` MODIFY COLUMN `longitude` DECIMAL(12,9) NOT NULL",
             "ALTER TABLE `product` MODIFY COLUMN `body` LONGTEXT NOT NULL",
             "ALTER TABLE `email` MODIFY COLUMN `is_primary` BOOL NOT NULL  DEFAULT 0",
-        )
+        }
         assert not set(Migrate.upgrade_operators).symmetric_difference(expected_upgrade_operators)
 
         assert not set(Migrate.downgrade_operators).symmetric_difference(
@@ -874,7 +874,7 @@ def test_migrate(mocker: MockerFixture):
         )
 
     elif isinstance(Migrate.ddl, PostgresDDL):
-        expected_upgrade_operators = set(
+        expected_upgrade_operators = {
             'ALTER TABLE "category" ALTER COLUMN "name" DROP NOT NULL',
             'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(100) USING "slug"::VARCHAR(100)',
             'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
@@ -905,8 +905,8 @@ def test_migrate(mocker: MockerFixture):
             'CREATE TABLE IF NOT EXISTS "newmodel" (\n    "id" SERIAL NOT NULL PRIMARY KEY,\n    "name" VARCHAR(50) NOT NULL\n);\nCOMMENT ON COLUMN "config"."user_id" IS \'User\';',
             'CREATE UNIQUE INDEX "uid_product_name_869427" ON "product" ("name", "type_db_alias")',
             'CREATE UNIQUE INDEX "uid_user_usernam_9987ab" ON "user" ("username")',
-        )
-        expected_downgrade_operators = set(
+        }
+        expected_downgrade_operators = {
             'ALTER TABLE "category" ALTER COLUMN "name" SET NOT NULL',
             'ALTER TABLE "category" ALTER COLUMN "slug" TYPE VARCHAR(200) USING "slug"::VARCHAR(200)',
             'ALTER TABLE "category" ALTER COLUMN "created_at" TYPE TIMESTAMPTZ USING "created_at"::TIMESTAMPTZ',
@@ -937,7 +937,7 @@ def test_migrate(mocker: MockerFixture):
             'DROP INDEX "uid_product_name_869427"',
             'DROP TABLE IF EXISTS "email_user"',
             'DROP TABLE IF EXISTS "newmodel"',
-        )
+        }
         assert not set(Migrate.upgrade_operators).symmetric_difference(expected_upgrade_operators)
         assert not set(Migrate.downgrade_operators).symmetric_difference(
             expected_downgrade_operators