diff --git a/test/core/Log/ExceptionLogTest.php b/test/core/Log/ExceptionLogTest.php
index 004596665..2cb7d8a79 100644
--- a/test/core/Log/ExceptionLogTest.php
+++ b/test/core/Log/ExceptionLogTest.php
@@ -17,7 +17,6 @@ namespace Combodo\iTop\Test\UnitTest\Core\Log;
 
 use Combodo\iTop\Test\UnitTest\ItopDataTestCase;
 use ExceptionLog;
-use MetaModel;
 
 
 require_once(__DIR__.'/ExceptionLogTest/Exceptions.php');
@@ -33,12 +32,6 @@ class ExceptionLogTest extends ItopDataTestCase
 	{
 		require_once(__DIR__.'/ExceptionLogTest/Exceptions.php');
 		parent::setUp();
-
-		// We are using PHPUnit\Framework\MockObject\Generator::generateMock that is throwing notice !
-		// Changing config so that those won't be caught by \DeprecatedCallsLog::DeprecatedNoticesErrorHandler
-		// disabling devenv is easier than changing log config O:)
-		$oConfig = MetaModel::GetConfig();
-		$oConfig->Set('developer_mode.enabled', false);
 	}
 
 	/**
diff --git a/test/core/Log/LogAPITest.php b/test/core/Log/LogAPITest.php
index 60fac6323..70705ced1 100644
--- a/test/core/Log/LogAPITest.php
+++ b/test/core/Log/LogAPITest.php
@@ -15,7 +15,6 @@ namespace Combodo\iTop\Test\UnitTest\Core\Log;
 
 
 use Combodo\iTop\Test\UnitTest\ItopDataTestCase;
-use MetaModel;
 
 /**
  * @runTestsInSeparateProcesses
@@ -31,12 +30,6 @@ class LogAPITest extends ItopDataTestCase
 	{
 		parent::setUp();
 
-		// We are using PHPUnit\Framework\MockObject\Generator::generateMock that is throwing notice !
-		// Changing config so that those won't be caught by \DeprecatedCallsLog::DeprecatedNoticesErrorHandler
-		// disabling devenv is easier than changing log config O:)
-		$oConfig = MetaModel::GetConfig();
-		$oConfig->Set('developer_mode.enabled', false);
-
 		$this->mockFileLog = $this->createMock('FileLog');
 		$this->oMetaModelConfig = $this->createMock('Config');
 	}
diff --git a/test/coreExtensions/UserLocalTest.php b/test/coreExtensions/UserLocalTest.php
index 89ce3404b..65864b137 100644
--- a/test/coreExtensions/UserLocalTest.php
+++ b/test/coreExtensions/UserLocalTest.php
@@ -34,10 +34,6 @@ class UserLocalTest extends ItopDataTestCase
 	 */
 	public function testValidatePassword($sPassword, $aValidatorNames, $aConfigValueMap, $bExpectedCheckStatus, $expectedCheckIssues = null, $sUserLanguage = null)
 	{
-		// We are calling methods that generates DEPRECATED warnings :( Like PHPUnit\Framework\MockObject\Generator::generateMock
-		// Since N°3002 this would make the test fail, so this is a workaround !
-		// changing ways to do mock will be done in N°4224
-		set_error_handler(array(__CLASS__, 'VoidErrorHandlerForDeprecated'));
 		$configMock = $this->createMock(\Config::class);
 		$configMock
 			->method('GetModuleSetting')
@@ -74,28 +70,6 @@ class UserLocalTest extends ItopDataTestCase
 		}
 	}
 
-	/**
-	 * Fake error handler to silently discard DEPRECATED warnings
-	 *
-	 * @param int $iErrNo
-	 * @param string $sErrStr
-	 * @param string $sErrFile
-	 * @param int $iErrLine
-	 *
-	 * @return boolean
-	 */
-	public static function VoidErrorHandlerForDeprecated($iErrno, $sErrStr, $sErrFile, $iErrLine)
-	{
-		if (
-			(\E_USER_DEPRECATED !== $iErrno)
-			&& (\E_DEPRECATED !== $iErrno)
-		) {
-			return false;
-		}
-
-		return true; // Ignore the error
-	}
-
 	public function ProviderValidatePassword()
 	{
 		return array(
@@ -262,7 +236,6 @@ class UserLocalTest extends ItopDataTestCase
 		);
 	}
 
-
 	/**
 	 * @dataProvider ProviderPasswordRenewal
 	 *