diff --git a/src/BaseActiveRecordTrait.php b/src/BaseActiveRecordTrait.php
index c5061b1ac..899df4ed2 100644
--- a/src/BaseActiveRecordTrait.php
+++ b/src/BaseActiveRecordTrait.php
@@ -205,6 +205,8 @@ public function __set(string $name, mixed $value): void
         if (method_exists($this, 'get' . ucfirst($name))) {
             throw new InvalidCallException('Setting read-only property: ' . static::class . '::' . $name);
         }
+
+        throw new UnknownPropertyException('Setting unknown property: ' . static::class . '::' . $name);
     }
 
     /**
diff --git a/tests/ActiveRecordTest.php b/tests/ActiveRecordTest.php
index 4d054d29e..700a0d00a 100644
--- a/tests/ActiveRecordTest.php
+++ b/tests/ActiveRecordTest.php
@@ -24,6 +24,7 @@
 use Yiisoft\Db\Exception\InvalidArgumentException;
 use Yiisoft\Db\Exception\InvalidCallException;
 use Yiisoft\Db\Exception\InvalidConfigException;
+use Yiisoft\Db\Exception\UnknownPropertyException;
 use Yiisoft\Db\Query\Query;
 
 abstract class ActiveRecordTest extends TestCase
@@ -595,6 +596,10 @@ public function testAttributeAccess(): void
         $this->assertSame([], $customer->orderItems);
         $this->assertFalse($customer->canGetProperty('non_existing_property'));
         $this->assertFalse($customer->canSetProperty('non_existing_property'));
+
+        $this->expectException(UnknownPropertyException::class);
+        $this->expectExceptionMessage('Setting unknown property: ' . Customer::class . '::non_existing_property');
+        $customer->non_existing_property = null;
     }
 
     public function testHasAttribute(): void