diff --git a/tests/CommandTest.php b/tests/CommandTest.php
index 3ae5b8c0..1f311ff9 100644
--- a/tests/CommandTest.php
+++ b/tests/CommandTest.php
@@ -8,12 +8,8 @@
 use Yiisoft\Db\Exception\Exception;
 use Yiisoft\Db\Exception\InvalidConfigException;
 use Yiisoft\Db\Exception\NotSupportedException;
-use Yiisoft\Db\Pgsql\Connection;
-use Yiisoft\Db\Pgsql\Dsn;
-use Yiisoft\Db\Pgsql\Driver;
 use Yiisoft\Db\Pgsql\Tests\Support\TestTrait;
 use Yiisoft\Db\Tests\Common\CommonCommandTest;
-use Yiisoft\Db\Tests\Support\DbHelper;
 
 use function serialize;
 
@@ -277,6 +273,6 @@ public function testinsertWithReturningPksUuid(): void
 
     public function testShowDatabases(): void
     {
-        $this->assertSame([self::getDatabaseName()], static::getDb()->createCommand()->showDatabases());
+        $this->assertSame([self::getDatabaseName()], self::getDb()->createCommand()->showDatabases());
     }
 }
diff --git a/tests/PDODriverTest.php b/tests/PDODriverTest.php
index a94e5b08..8285e977 100644
--- a/tests/PDODriverTest.php
+++ b/tests/PDODriverTest.php
@@ -8,7 +8,6 @@
 use PHPUnit\Framework\TestCase;
 use Yiisoft\Db\Exception\Exception;
 use Yiisoft\Db\Exception\InvalidConfigException;
-use Yiisoft\Db\Pgsql\Driver;
 use Yiisoft\Db\Pgsql\Tests\Support\TestTrait;
 
 /**