diff --git a/src/Driver/Pdo/AbstractPdoConnection.php b/src/Driver/Pdo/AbstractPdoConnection.php
index fcb565693..19ca7f7c5 100644
--- a/src/Driver/Pdo/AbstractPdoConnection.php
+++ b/src/Driver/Pdo/AbstractPdoConnection.php
@@ -21,7 +21,6 @@
 use Yiisoft\Db\QueryBuilder\QueryBuilderInterface;
 use Yiisoft\Db\Schema\Column\ColumnFactoryInterface;
 use Yiisoft\Db\Schema\QuoterInterface;
-use Yiisoft\Db\Schema\SchemaInterface;
 use Yiisoft\Db\Transaction\TransactionInterface;
 
 use function array_keys;
diff --git a/src/QueryBuilder/AbstractQueryBuilder.php b/src/QueryBuilder/AbstractQueryBuilder.php
index 44afec916..1b10c28f8 100644
--- a/src/QueryBuilder/AbstractQueryBuilder.php
+++ b/src/QueryBuilder/AbstractQueryBuilder.php
@@ -13,8 +13,6 @@
 use Yiisoft\Db\Schema\SchemaInterface;
 
 use function count;
-use function preg_match;
-use function preg_replace;
 
 /**
  * Builds a SELECT SQL statement based on the specification given as a {@see QueryInterface} object.
diff --git a/src/Schema/AbstractSchema.php b/src/Schema/AbstractSchema.php
index 4a3395296..0c6f28a2d 100644
--- a/src/Schema/AbstractSchema.php
+++ b/src/Schema/AbstractSchema.php
@@ -13,9 +13,9 @@
 use Yiisoft\Db\Constraint\IndexConstraint;
 use Yiisoft\Db\Exception\NotSupportedException;
 
-use Yiisoft\Db\Schema\Column\ColumnBuilder;
 use Yiisoft\Db\Schema\Column\ColumnFactory;
 use Yiisoft\Db\Schema\Column\ColumnFactoryInterface;
+
 use function array_change_key_case;
 use function array_map;
 use function gettype;
diff --git a/src/Schema/Column/BigIntColumn.php b/src/Schema/Column/BigIntColumn.php
index a6df734c6..e1954b515 100644
--- a/src/Schema/Column/BigIntColumn.php
+++ b/src/Schema/Column/BigIntColumn.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Db\Schema\Column;
 
-use Yiisoft\Db\Expression\Expression;
 use Yiisoft\Db\Expression\ExpressionInterface;
 use Yiisoft\Db\Schema\SchemaInterface;
 
diff --git a/src/Schema/Column/DoubleColumn.php b/src/Schema/Column/DoubleColumn.php
index 136fbeeee..59d044153 100644
--- a/src/Schema/Column/DoubleColumn.php
+++ b/src/Schema/Column/DoubleColumn.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Db\Schema\Column;
 
-use Yiisoft\Db\Expression\Expression;
 use Yiisoft\Db\Expression\ExpressionInterface;
 use Yiisoft\Db\Schema\SchemaInterface;
 
diff --git a/src/Schema/Column/IntegerColumn.php b/src/Schema/Column/IntegerColumn.php
index e9d23d10e..695b3feae 100644
--- a/src/Schema/Column/IntegerColumn.php
+++ b/src/Schema/Column/IntegerColumn.php
@@ -4,7 +4,6 @@
 
 namespace Yiisoft\Db\Schema\Column;
 
-use Yiisoft\Db\Expression\Expression;
 use Yiisoft\Db\Expression\ExpressionInterface;
 use Yiisoft\Db\Schema\SchemaInterface;
 
diff --git a/tests/Db/Schema/SchemaTest.php b/tests/Db/Schema/SchemaTest.php
index f9bc783af..e407912ab 100644
--- a/tests/Db/Schema/SchemaTest.php
+++ b/tests/Db/Schema/SchemaTest.php
@@ -16,7 +16,6 @@
 use Yiisoft\Db\Tests\AbstractSchemaTest;
 use Yiisoft\Db\Tests\Support\Assert;
 use Yiisoft\Db\Tests\Support\DbHelper;
-use Yiisoft\Db\Tests\Support\Stub\Column;
 use Yiisoft\Db\Tests\Support\Stub\Schema;
 use Yiisoft\Db\Tests\Support\Stub\TableSchema;
 use Yiisoft\Db\Tests\Support\TestTrait;