diff --git a/typo3/sysext/extbase/Tests/Unit/Configuration/AbstractConfigurationManagerTest.php b/typo3/sysext/extbase/Tests/Unit/Configuration/AbstractConfigurationManagerTest.php
index 5aacdeb10260f2b52c42b50023e2bfc436cbf683..70ba5c8c1b550dc0bb67bd142a46ce5f07d1b10f 100644
--- a/typo3/sysext/extbase/Tests/Unit/Configuration/AbstractConfigurationManagerTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Configuration/AbstractConfigurationManagerTest.php
@@ -27,8 +27,6 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
  */
 class AbstractConfigurationManagerTest extends UnitTestCase
 {
-    protected $resetSingletonInstances = true;
-
     /**
      * @var AbstractConfigurationManager|\PHPUnit_Framework_MockObject_MockObject|AccessibleObjectInterface
      */
diff --git a/typo3/sysext/extbase/Tests/Unit/Configuration/BackendConfigurationManagerTest.php b/typo3/sysext/extbase/Tests/Unit/Configuration/BackendConfigurationManagerTest.php
index 8e29d2157b5f0fee60ed836ccc3a7e4b0c23bcd5..1550863bfedd0d57793d28dcb17ad302a27bb50e 100644
--- a/typo3/sysext/extbase/Tests/Unit/Configuration/BackendConfigurationManagerTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Configuration/BackendConfigurationManagerTest.php
@@ -23,8 +23,6 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
  */
 class BackendConfigurationManagerTest extends UnitTestCase
 {
-    protected $resetSingletonInstances = true;
-
     /**
      * @var \TYPO3\CMS\Extbase\Configuration\BackendConfigurationManager|\PHPUnit_Framework_MockObject_MockObject|\TYPO3\TestingFramework\Core\AccessibleObjectInterface
      */
diff --git a/typo3/sysext/extbase/Tests/Unit/Configuration/FrontendConfigurationManagerTest.php b/typo3/sysext/extbase/Tests/Unit/Configuration/FrontendConfigurationManagerTest.php
index cb8b1996fce1d922677455410ececb420cfb8f79..f71cf26687ab02a8fb950dc7fe08bd6cdc1585f6 100644
--- a/typo3/sysext/extbase/Tests/Unit/Configuration/FrontendConfigurationManagerTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Configuration/FrontendConfigurationManagerTest.php
@@ -29,8 +29,6 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
  */
 class FrontendConfigurationManagerTest extends UnitTestCase
 {
-    protected $resetSingletonInstances = true;
-
     /**
      * @var ContentObjectRenderer|\PHPUnit_Framework_MockObject_MockObject
      */
diff --git a/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/Mapper/DataMapperTest.php b/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/Mapper/DataMapperTest.php
index ed2ceaa0f396e52bc4c002d9a7963a1fe270b06b..aafd577ceac55ac2cd9cb25e0e49ae6964ebd7f5 100644
--- a/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/Mapper/DataMapperTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/Mapper/DataMapperTest.php
@@ -29,8 +29,6 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
  */
 class DataMapperTest extends UnitTestCase
 {
-    protected $resetSingletonInstances = true;
-
     /**
      * This test does not actually test anything rather than map calls both mocked methods getTargetType and mapSingleRow
      * while completely ignoring the result of the method.
diff --git a/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/QueryTest.php b/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/QueryTest.php
index c7dd4efe22d157c0dfbc148d7c371aa6151aa85b..3d4fa824a02cea1d430e30a99c3ed0bbadb24f6c 100644
--- a/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/QueryTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/QueryTest.php
@@ -21,8 +21,6 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
  */
 class QueryTest extends UnitTestCase
 {
-    protected $resetSingletonInstances = true;
-
     /**
      * @var \TYPO3\CMS\Extbase\Persistence\Generic\Query|\PHPUnit_Framework_MockObject_MockObject|\TYPO3\TestingFramework\Core\AccessibleObjectInterface
      */
diff --git a/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/SessionTest.php b/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/SessionTest.php
index f26ea5eed1926f8125749a2c0aeb0c5831dc3211..1fa5881b5fef4e3b7292e205475d23ca70c4fa7e 100644
--- a/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/SessionTest.php
+++ b/typo3/sysext/extbase/Tests/Unit/Persistence/Generic/SessionTest.php
@@ -22,8 +22,6 @@ use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
 
 class SessionTest extends UnitTestCase
 {
-    protected $resetSingletonInstances = true;
-
     /**
      * @test
      */