diff --git a/lib/ModelTrait.php b/lib/ModelTrait.php
index f3f33641b..e3d6d9b2d 100644
--- a/lib/ModelTrait.php
+++ b/lib/ModelTrait.php
@@ -800,7 +800,7 @@ protected function executeDestroy()
      */
     protected function set($name, $value, bool $throwException = true)
     {
-        if ($this->coll) {
+        if ($this->coll && $value instanceof static) {
             return $this->setCollValue($name, $value);
         }
 
diff --git a/tests/unit/Model/CollTest.php b/tests/unit/Model/CollTest.php
index 589a665a6..64730e1ed 100644
--- a/tests/unit/Model/CollTest.php
+++ b/tests/unit/Model/CollTest.php
@@ -4,6 +4,7 @@
 
 namespace WeiTest\Model;
 
+use Wei\Logger;
 use WeiTest\Fixtures\DbTrait;
 use WeiTest\Model\Fixture\TestUser;
 use WeiTest\TestCase;
@@ -73,7 +74,7 @@ public function testOffsetSet()
 
     public function testOffsetSetInvalid()
     {
-        $this->expectException(\TypeError::class);
+        $this->expectExceptionObject(new \InvalidArgumentException('Invalid property: key'));
 
         $users = TestUser::newColl();
         $users['key'] = 'test';
@@ -137,7 +138,7 @@ public function testSet()
 
     public function testSetInvalid()
     {
-        $this->expectException(\TypeError::class);
+        $this->expectExceptionObject(new \InvalidArgumentException('Invalid property: key'));
 
         $users = TestUser::newColl();
         $users->set('key', 'test');
@@ -262,7 +263,7 @@ public function testAddNotModelToCollection()
 
         $users = TestUser::newColl();
 
-        $this->expectException(\TypeError::class);
+        $this->expectExceptionObject(new \InvalidArgumentException('Invalid property: [null]'));
 
         // Assign non record value to raise an exception
         $users[] = 234;
@@ -623,6 +624,15 @@ public function testSerialize()
         $this->assertSqlSame('SELECT * FROM `test_users` WHERE `id` IN (?, ?)', $sql);
     }
 
+    public function testGetService()
+    {
+        $this->initFixtures();
+
+        $users = TestUser::newColl();
+
+        $this->assertInstanceOf(Logger::class, $users->logger);
+    }
+
     protected function assertSqlSame($expected, $actual, string $message = '')
     {
         $this->assertSame($expected, str_replace($this->db->getTablePrefix(), '', $actual), $message);
diff --git a/tests/unit/Model/Fixture/TestUser.php b/tests/unit/Model/Fixture/TestUser.php
index 3a9087b92..8f000e8ab 100644
--- a/tests/unit/Model/Fixture/TestUser.php
+++ b/tests/unit/Model/Fixture/TestUser.php
@@ -18,6 +18,7 @@
  * @property string|null $name
  * @property int|null $group_id
  * @property string|null $address
+ * @mixin \LoggerPropMixin
  */
 class TestUser extends BaseModel
 {