diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index d5fec8491..24f0750db 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -110,6 +110,7 @@ jobs:
         with:
           php-version: ${{ matrix.php }}
           extensions: ${{ env.extensions }}
+          ini-file: development
           ini-values: date.timezone='UTC'
           coverage: xdebug
           tools: composer:v2, pecl
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 18ea5772e..edb4c7a22 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -1,5 +1,10 @@
 <?php
 
+if (version_compare(PHP_VERSION, '8.3', '>=')) {
+	// skip deprecation errors in PHP 8.3 and above
+	error_reporting(E_ALL & ~E_DEPRECATED);
+}
+
 defined('YII_ENABLE_EXCEPTION_HANDLER') or define('YII_ENABLE_EXCEPTION_HANDLER',false);
 defined('YII_ENABLE_ERROR_HANDLER') or define('YII_ENABLE_ERROR_HANDLER',false);
 defined('YII_DEBUG') or define('YII_DEBUG',true);
diff --git a/tests/framework/db/CDbCommandTest.php b/tests/framework/db/CDbCommandTest.php
index 7029dd505..a0df37ebc 100644
--- a/tests/framework/db/CDbCommandTest.php
+++ b/tests/framework/db/CDbCommandTest.php
@@ -252,4 +252,5 @@ class CDbCommandTest extends CTestCase
 	}
 }
 
+#[\AllowDynamicProperties]
 class TestClass {}
\ No newline at end of file
diff --git a/tests/framework/web/helpers/CJSONTest.php b/tests/framework/web/helpers/CJSONTest.php
index 5b7cdd914..9accacdd7 100644
--- a/tests/framework/web/helpers/CJSONTest.php
+++ b/tests/framework/web/helpers/CJSONTest.php
@@ -85,6 +85,7 @@ class CJSONTest extends CTestCase {
         $className = get_class($this).'_JsonSerializable';
         $classCode = <<<EOL
 class $className implements JsonSerializable{
+	#[ReturnTypeWillChange]
 	public function jsonSerialize()
 	{
 		return 'test';