diff --git a/composer.json b/composer.json
index 4d97909f..5132248e 100644
--- a/composer.json
+++ b/composer.json
@@ -74,6 +74,8 @@
         "cs:fix": "php-cs-fixer fix -v",
         "psalm": "psalm",
         "psalm:baseline": "psalm --set-baseline=psalm-baseline.xml",
-        "test": "phpunit --color=always"
+        "test": "phpunit --color=always",
+        "test:unit": "phpunit --exclude-group driver --colors=always",
+        "test:sqlite": "phpunit --group driver-sqlite --colors=always"
     }
 }
diff --git a/src/Mapper/Proxy/EntityProxyTrait.php b/src/Mapper/Proxy/EntityProxyTrait.php
index 31f8e44d..095707f0 100644
--- a/src/Mapper/Proxy/EntityProxyTrait.php
+++ b/src/Mapper/Proxy/EntityProxyTrait.php
@@ -57,9 +57,15 @@ public function __unset(string $name): void
     public function __set(string $name, $value): void
     {
         if (!\array_key_exists($name, $this->__cycle_orm_rel_map->getRelations())) {
-            if (\method_exists(parent::class, '__set')) {
-                parent::__set($name, $value);
+            if (!\method_exists(parent::class, '__set')) {
+                throw new \Error(\sprintf(
+                    'Cannot access non-public property %s::$%s',
+                    \get_parent_class(static::class),
+                    $name,
+                ));
             }
+
+            parent::__set($name, $value);
             return;
         }
 
diff --git a/tests/ORM/Functional/Driver/Common/Integration/Case6/CaseTest.php b/tests/ORM/Functional/Driver/Common/Integration/Case6/CaseTest.php
new file mode 100644
index 00000000..951643fe
--- /dev/null
+++ b/tests/ORM/Functional/Driver/Common/Integration/Case6/CaseTest.php
@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6;
+
+use Cycle\ORM\Select;
+use Cycle\ORM\Tests\Functional\Driver\Common\BaseTest;
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\Entity\User;
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\IntegrationTestTrait;
+use Cycle\ORM\Tests\Traits\TableTrait;
+
+abstract class CaseTest extends BaseTest
+{
+    use IntegrationTestTrait;
+    use TableTrait;
+
+    public function setUp(): void
+    {
+        // Init DB
+        parent::setUp();
+
+        // Make tables
+        $this->makeTable('users', [
+            'id' => 'int,primary',
+            'login' => 'string',
+        ]);
+
+        $this->loadSchema(__DIR__ . '/schema.php');
+
+        $this->getDatabase()->table('users')->insertMultiple(
+            ['id', 'login'],
+            [
+                [1, 'foo'],
+            ],
+        );
+    }
+
+    public function testSelect(): void
+    {
+        /** @var User $model */
+        $model = (new Select($this->orm,User::class))
+            ->wherePK(1)
+            ->fetchOne();
+
+        $this->assertSame('foo', $model->getLogin());
+        $this->expectException(\Error::class);
+        $this->expectExceptionMessage('Cannot access non-public property ' . User::class . '::$login');
+
+        $model->login = 'new login';
+    }
+}
diff --git a/tests/ORM/Functional/Driver/Common/Integration/Case6/Entity/User.php b/tests/ORM/Functional/Driver/Common/Integration/Case6/Entity/User.php
new file mode 100644
index 00000000..44095601
--- /dev/null
+++ b/tests/ORM/Functional/Driver/Common/Integration/Case6/Entity/User.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\Entity;
+
+class User
+{
+    private ?int $id = null;
+    private string $login;
+
+    public function __construct(string $login)
+    {
+        $this->login = $login;
+    }
+
+    public function getId(): ?string
+    {
+        return $this->id === null ? null : (string)$this->id;
+    }
+
+    public function getLogin(): string
+    {
+        return $this->login;
+    }
+}
diff --git a/tests/ORM/Functional/Driver/Common/Integration/Case6/schema.php b/tests/ORM/Functional/Driver/Common/Integration/Case6/schema.php
new file mode 100644
index 00000000..cc0dd8c8
--- /dev/null
+++ b/tests/ORM/Functional/Driver/Common/Integration/Case6/schema.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+use Cycle\ORM\Mapper\Mapper;
+use Cycle\ORM\SchemaInterface as Schema;
+use Cycle\ORM\Select\Repository;
+use Cycle\ORM\Select\Source;
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\Entity\User;
+
+return [
+    'users' => [
+        Schema::ENTITY => User::class,
+        Schema::MAPPER => Mapper::class,
+        Schema::SOURCE => Source::class,
+        Schema::REPOSITORY => Repository::class,
+        Schema::DATABASE => 'default',
+        Schema::TABLE => 'users',
+        Schema::PRIMARY_KEY => ['id'],
+        Schema::FIND_BY_KEYS => ['id'],
+        Schema::COLUMNS => [
+            'id' => 'id',
+            'login' => 'login',
+        ],
+        Schema::RELATIONS => [],
+        Schema::TYPECAST => [
+            'id' => 'int',
+            'login' => 'string',
+        ],
+    ],
+];
diff --git a/tests/ORM/Functional/Driver/MySQL/Integration/Case6/CaseTest.php b/tests/ORM/Functional/Driver/MySQL/Integration/Case6/CaseTest.php
new file mode 100644
index 00000000..f96d12bc
--- /dev/null
+++ b/tests/ORM/Functional/Driver/MySQL/Integration/Case6/CaseTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\ORM\Tests\Functional\Driver\MySQL\Integration\Case6;
+
+// phpcs:ignore
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\CaseTest as CommonClass;
+
+/**
+ * @group driver
+ * @group driver-mysql
+ */
+class CaseTest extends CommonClass
+{
+    public const DRIVER = 'mysql';
+}
diff --git a/tests/ORM/Functional/Driver/Postgres/Integration/Case6/CaseTest.php b/tests/ORM/Functional/Driver/Postgres/Integration/Case6/CaseTest.php
new file mode 100644
index 00000000..18ca7e92
--- /dev/null
+++ b/tests/ORM/Functional/Driver/Postgres/Integration/Case6/CaseTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\ORM\Tests\Functional\Driver\Postgres\Integration\Case6;
+
+// phpcs:ignore
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\CaseTest as CommonClass;
+
+/**
+ * @group driver
+ * @group driver-postgres
+ */
+class CaseTest extends CommonClass
+{
+    public const DRIVER = 'postgres';
+}
diff --git a/tests/ORM/Functional/Driver/SQLServer/Integration/Case6/CaseTest.php b/tests/ORM/Functional/Driver/SQLServer/Integration/Case6/CaseTest.php
new file mode 100644
index 00000000..8a1a3a46
--- /dev/null
+++ b/tests/ORM/Functional/Driver/SQLServer/Integration/Case6/CaseTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\ORM\Tests\Functional\Driver\SQLServer\Integration\Case6;
+
+// phpcs:ignore
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\CaseTest as CommonClass;
+
+/**
+ * @group driver
+ * @group driver-sqlserver
+ */
+class CaseTest extends CommonClass
+{
+    public const DRIVER = 'sqlserver';
+}
diff --git a/tests/ORM/Functional/Driver/SQLite/Integration/Case6/CaseTest.php b/tests/ORM/Functional/Driver/SQLite/Integration/Case6/CaseTest.php
new file mode 100644
index 00000000..022eb286
--- /dev/null
+++ b/tests/ORM/Functional/Driver/SQLite/Integration/Case6/CaseTest.php
@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Cycle\ORM\Tests\Functional\Driver\SQLite\Integration\Case6;
+
+// phpcs:ignore
+use Cycle\ORM\Tests\Functional\Driver\Common\Integration\Case6\CaseTest as CommonClass;
+
+/**
+ * @group driver
+ * @group driver-sqlite
+ */
+class CaseTest extends CommonClass
+{
+    public const DRIVER = 'sqlite';
+}
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 5a9e9977..dca5c293 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -4,7 +4,7 @@
 
 use Cycle\Database\Config;
 
-error_reporting(E_ALL | E_STRICT);
+error_reporting(E_ALL);
 ini_set('display_errors', '1');
 
 //Composer