diff --git a/composer.json b/composer.json
index bd8e8506175..5c0bf595844 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
     },
     "require-dev": {
         "symfony/yaml": "~2.3|~3.0",
-        "phpunit/phpunit": "^5.7"
+        "phpunit/phpunit": "^6.0"
     },
     "suggest": {
         "symfony/yaml": "If you want to use YAML Metadata Mapping Driver"
diff --git a/tests/Doctrine/Tests/DoctrineTestCase.php b/tests/Doctrine/Tests/DoctrineTestCase.php
index e5ce27af91d..457f52f366c 100644
--- a/tests/Doctrine/Tests/DoctrineTestCase.php
+++ b/tests/Doctrine/Tests/DoctrineTestCase.php
@@ -2,9 +2,11 @@
 
 namespace Doctrine\Tests;
 
+use PHPUnit\Framework\TestCase;
+
 /**
  * Base testcase class for all Doctrine testcases.
  */
-abstract class DoctrineTestCase extends \PHPUnit_Framework_TestCase
+abstract class DoctrineTestCase extends TestCase
 {
 }
diff --git a/tests/Doctrine/Tests/ORM/ConfigurationTest.php b/tests/Doctrine/Tests/ORM/ConfigurationTest.php
index 1b0042064f3..df74c6df246 100644
--- a/tests/Doctrine/Tests/ORM/ConfigurationTest.php
+++ b/tests/Doctrine/Tests/ORM/ConfigurationTest.php
@@ -17,13 +17,13 @@
 use Doctrine\ORM\Query\ResultSetMapping;
 use Doctrine\Tests\Models\DDC753\DDC753CustomRepository;
 use ReflectionClass;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for the Configuration object
  * @author Marco Pivetta <ocramius@gmail.com>
  */
-class ConfigurationTest extends PHPUnit_Framework_TestCase
+class ConfigurationTest extends TestCase
 {
     /**
      * @var Configuration
diff --git a/tests/Doctrine/Tests/ORM/Decorator/EntityManagerDecoratorTest.php b/tests/Doctrine/Tests/ORM/Decorator/EntityManagerDecoratorTest.php
index 1e9f55d43ff..b8688d871db 100644
--- a/tests/Doctrine/Tests/ORM/Decorator/EntityManagerDecoratorTest.php
+++ b/tests/Doctrine/Tests/ORM/Decorator/EntityManagerDecoratorTest.php
@@ -5,8 +5,9 @@
 use Doctrine\ORM\Decorator\EntityManagerDecorator;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\Query\ResultSetMapping;
+use PHPUnit\Framework\TestCase;
 
-class EntityManagerDecoratorTest extends \PHPUnit_Framework_TestCase
+class EntityManagerDecoratorTest extends TestCase
 {
     const VOID_METHODS = [
         'persist',
diff --git a/tests/Doctrine/Tests/ORM/EntityNotFoundExceptionTest.php b/tests/Doctrine/Tests/ORM/EntityNotFoundExceptionTest.php
index bc4979000e8..ec1cfbfc99c 100644
--- a/tests/Doctrine/Tests/ORM/EntityNotFoundExceptionTest.php
+++ b/tests/Doctrine/Tests/ORM/EntityNotFoundExceptionTest.php
@@ -3,13 +3,14 @@
 namespace Doctrine\Tests\ORM;
 
 use Doctrine\ORM\EntityNotFoundException;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for {@see \Doctrine\ORM\EntityNotFoundException}
  *
  * @covers \Doctrine\ORM\EntityNotFoundException
  */
-class EntityNotFoundExceptionTest extends \PHPUnit_Framework_TestCase
+class EntityNotFoundExceptionTest extends TestCase
 {
     public function testFromClassNameAndIdentifier()
     {
diff --git a/tests/Doctrine/Tests/ORM/Event/OnClassMetadataNotFoundEventArgsTest.php b/tests/Doctrine/Tests/ORM/Event/OnClassMetadataNotFoundEventArgsTest.php
index 54f2feb0dd8..e5f62bd26ae 100644
--- a/tests/Doctrine/Tests/ORM/Event/OnClassMetadataNotFoundEventArgsTest.php
+++ b/tests/Doctrine/Tests/ORM/Event/OnClassMetadataNotFoundEventArgsTest.php
@@ -5,14 +5,14 @@
 use Doctrine\Common\Persistence\Mapping\ClassMetadata;
 use Doctrine\Common\Persistence\ObjectManager;
 use Doctrine\ORM\Event\OnClassMetadataNotFoundEventArgs;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for {@see \Doctrine\ORM\Event\OnClassMetadataNotFoundEventArgs}
  *
  * @covers \Doctrine\ORM\Event\OnClassMetadataNotFoundEventArgs
  */
-class OnClassMetadataNotFoundEventArgsTest extends PHPUnit_Framework_TestCase
+class OnClassMetadataNotFoundEventArgsTest extends TestCase
 {
     public function testEventArgsMutability()
     {
diff --git a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2359Test.php b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2359Test.php
index ba8a621d59b..21a932ed36d 100644
--- a/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2359Test.php
+++ b/tests/Doctrine/Tests/ORM/Functional/Ticket/DDC2359Test.php
@@ -8,11 +8,12 @@
 use Doctrine\ORM\EntityManager;
 use Doctrine\ORM\Mapping\ClassMetadata;
 use Doctrine\ORM\Mapping\ClassMetadataFactory;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @group DDC-2359
  */
-class DDC2359Test extends \PHPUnit_Framework_TestCase
+class DDC2359Test extends TestCase
 {
 
     /**
diff --git a/tests/Doctrine/Tests/ORM/Internal/HydrationCompleteHandlerTest.php b/tests/Doctrine/Tests/ORM/Internal/HydrationCompleteHandlerTest.php
index 851cc2ae370..27b23f5128f 100644
--- a/tests/Doctrine/Tests/ORM/Internal/HydrationCompleteHandlerTest.php
+++ b/tests/Doctrine/Tests/ORM/Internal/HydrationCompleteHandlerTest.php
@@ -25,7 +25,7 @@
 use Doctrine\ORM\Events;
 use Doctrine\ORM\Internal\HydrationCompleteHandler;
 use Doctrine\ORM\Mapping\ClassMetadata;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use stdClass;
 
 /**
@@ -33,7 +33,7 @@
  *
  * @covers \Doctrine\ORM\Internal\HydrationCompleteHandler
  */
-class HydrationCompleteHandlerTest extends PHPUnit_Framework_TestCase
+class HydrationCompleteHandlerTest extends TestCase
 {
     /**
      * @var \Doctrine\ORM\Event\ListenersInvoker|\PHPUnit_Framework_MockObject_MockObject
diff --git a/tests/Doctrine/Tests/ORM/LazyCriteriaCollectionTest.php b/tests/Doctrine/Tests/ORM/LazyCriteriaCollectionTest.php
index 3015341d951..9286da614f8 100644
--- a/tests/Doctrine/Tests/ORM/LazyCriteriaCollectionTest.php
+++ b/tests/Doctrine/Tests/ORM/LazyCriteriaCollectionTest.php
@@ -6,6 +6,7 @@
 use Doctrine\Common\Collections\Criteria;
 use Doctrine\ORM\LazyCriteriaCollection;
 use Doctrine\ORM\Persisters\Entity\EntityPersister;
+use PHPUnit\Framework\TestCase;
 use stdClass;
 
 /**
@@ -13,7 +14,7 @@
  *
  * @covers \Doctrine\ORM\LazyCriteriaCollection
  */
-class LazyCriteriaCollectionTest extends \PHPUnit_Framework_TestCase
+class LazyCriteriaCollectionTest extends TestCase
 {
     /**
      * @var \Doctrine\ORM\Persisters\Entity\EntityPersister|\PHPUnit_Framework_MockObject_MockObject
diff --git a/tests/Doctrine/Tests/ORM/Mapping/Reflection/ReflectionPropertiesGetterTest.php b/tests/Doctrine/Tests/ORM/Mapping/Reflection/ReflectionPropertiesGetterTest.php
index 06a895159c5..29906d59b9d 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/Reflection/ReflectionPropertiesGetterTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/Reflection/ReflectionPropertiesGetterTest.php
@@ -7,7 +7,7 @@
 use Doctrine\ORM\Mapping\Reflection\ReflectionPropertiesGetter;
 use Doctrine\Tests\Models\Reflection\ClassWithMixedProperties;
 use Doctrine\Tests\Models\Reflection\ParentClass;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 use ReflectionClass;
 
 /**
@@ -15,7 +15,7 @@
  *
  * @covers \Doctrine\ORM\Mapping\Reflection\ReflectionPropertiesGetter
  */
-class ReflectionPropertiesGetterTest extends PHPUnit_Framework_TestCase
+class ReflectionPropertiesGetterTest extends TestCase
 {
     public function testRetrievesProperties()
     {
diff --git a/tests/Doctrine/Tests/ORM/Mapping/ReflectionEmbeddedPropertyTest.php b/tests/Doctrine/Tests/ORM/Mapping/ReflectionEmbeddedPropertyTest.php
index 04ed194a62f..82761282ad4 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/ReflectionEmbeddedPropertyTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/ReflectionEmbeddedPropertyTest.php
@@ -9,6 +9,7 @@
 use Doctrine\Tests\Models\Reflection\AbstractEmbeddable;
 use Doctrine\Tests\Models\Reflection\ArrayObjectExtendingClass;
 use Doctrine\Tests\Models\Reflection\ConcreteEmbeddable;
+use PHPUnit\Framework\TestCase;
 use ReflectionProperty;
 
 /**
@@ -16,7 +17,7 @@
  *
  * @covers \Doctrine\ORM\Mapping\ReflectionEmbeddedProperty
  */
-class ReflectionEmbeddedPropertyTest extends \PHPUnit_Framework_TestCase
+class ReflectionEmbeddedPropertyTest extends TestCase
 {
     /**
      * @param ReflectionProperty $parentProperty  property of the embeddable/entity where to write the embeddable to
diff --git a/tests/Doctrine/Tests/ORM/Mapping/Symfony/AbstractDriverTest.php b/tests/Doctrine/Tests/ORM/Mapping/Symfony/AbstractDriverTest.php
index 082ebaf94be..85b3b2138dd 100644
--- a/tests/Doctrine/Tests/ORM/Mapping/Symfony/AbstractDriverTest.php
+++ b/tests/Doctrine/Tests/ORM/Mapping/Symfony/AbstractDriverTest.php
@@ -2,11 +2,12 @@
 
 namespace Doctrine\Tests\ORM\Mapping\Symfony;
 use Doctrine\Common\Persistence\Mapping\MappingException;
+use PHPUnit\Framework\TestCase;
 
 /**
  * @group DDC-1418
  */
-abstract class AbstractDriverTest extends \PHPUnit_Framework_TestCase
+abstract class AbstractDriverTest extends TestCase
 {
     public function testFindMappingFile()
     {
diff --git a/tests/Doctrine/Tests/ORM/ORMInvalidArgumentExceptionTest.php b/tests/Doctrine/Tests/ORM/ORMInvalidArgumentExceptionTest.php
index 81f22e2b7dc..b4d26907854 100644
--- a/tests/Doctrine/Tests/ORM/ORMInvalidArgumentExceptionTest.php
+++ b/tests/Doctrine/Tests/ORM/ORMInvalidArgumentExceptionTest.php
@@ -21,12 +21,13 @@
 use Doctrine\Tests\Models\GeoNames\City;
 use Doctrine\Tests\Models\GeoNames\Country;
 use Doctrine\Tests\OrmTestCase;
+use PHPUnit\Framework\TestCase;
 use stdClass;
 
 /**
  * @covers \Doctrine\ORM\ORMInvalidArgumentException
  */
-class ORMInvalidArgumentExceptionTest extends \PHPUnit_Framework_TestCase
+class ORMInvalidArgumentExceptionTest extends TestCase
 {
     /**
      * @dataProvider invalidEntityNames
diff --git a/tests/Doctrine/Tests/ORM/Query/LanguageRecognitionTest.php b/tests/Doctrine/Tests/ORM/Query/LanguageRecognitionTest.php
index 46e72245a22..064c0a799cb 100644
--- a/tests/Doctrine/Tests/ORM/Query/LanguageRecognitionTest.php
+++ b/tests/Doctrine/Tests/ORM/Query/LanguageRecognitionTest.php
@@ -24,6 +24,7 @@ public function assertValidDQL($dql, $debug = false)
     {
         try {
             $parserResult = $this->parseDql($dql);
+            $this->addToAssertionCount(1);
         } catch (QueryException $e) {
             if ($debug) {
                 echo $e->getTraceAsString() . PHP_EOL;
@@ -44,6 +45,7 @@ public function assertInvalidDQL($dql, $debug = false)
                 echo $e->getMessage() . PHP_EOL;
                 echo $e->getTraceAsString() . PHP_EOL;
             }
+            $this->addToAssertionCount(1);
         }
     }
 
diff --git a/tests/Doctrine/Tests/ORM/Query/ParserResultTest.php b/tests/Doctrine/Tests/ORM/Query/ParserResultTest.php
index 3d74e0f96c5..1b74654430e 100644
--- a/tests/Doctrine/Tests/ORM/Query/ParserResultTest.php
+++ b/tests/Doctrine/Tests/ORM/Query/ParserResultTest.php
@@ -5,8 +5,9 @@
 use Doctrine\ORM\Query\Exec\AbstractSqlExecutor;
 use Doctrine\ORM\Query\ParserResult;
 use Doctrine\ORM\Query\ResultSetMapping;
+use PHPUnit\Framework\TestCase;
 
-class ParserResultTest extends \PHPUnit_Framework_TestCase
+class ParserResultTest extends TestCase
 {
     public $parserResult;
 
diff --git a/tests/Doctrine/Tests/ORM/Query/QueryExpressionVisitorTest.php b/tests/Doctrine/Tests/ORM/Query/QueryExpressionVisitorTest.php
index 91b99f2e35f..4e7434c851f 100644
--- a/tests/Doctrine/Tests/ORM/Query/QueryExpressionVisitorTest.php
+++ b/tests/Doctrine/Tests/ORM/Query/QueryExpressionVisitorTest.php
@@ -9,13 +9,14 @@
 use Doctrine\ORM\Query\Expr as QueryBuilder;
 use Doctrine\ORM\Query\Parameter;
 use Doctrine\ORM\Query\QueryExpressionVisitor;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Test for QueryExpressionVisitor
  *
  * @author Kirill chEbba Chebunin <iam@chebba.org>
  */
-class QueryExpressionVisitorTest extends \PHPUnit_Framework_TestCase
+class QueryExpressionVisitorTest extends TestCase
 {
     /**
      * @var QueryExpressionVisitor
diff --git a/tests/Doctrine/Tests/ORM/Repository/DefaultRepositoryFactoryTest.php b/tests/Doctrine/Tests/ORM/Repository/DefaultRepositoryFactoryTest.php
index 963757618af..85a63404618 100644
--- a/tests/Doctrine/Tests/ORM/Repository/DefaultRepositoryFactoryTest.php
+++ b/tests/Doctrine/Tests/ORM/Repository/DefaultRepositoryFactoryTest.php
@@ -8,14 +8,14 @@
 use Doctrine\ORM\Repository\DefaultRepositoryFactory;
 use Doctrine\Tests\Models\DDC753\DDC753DefaultRepository;
 use Doctrine\Tests\Models\DDC869\DDC869PaymentRepository;
-use PHPUnit_Framework_TestCase;
+use PHPUnit\Framework\TestCase;
 
 /**
  * Tests for {@see \Doctrine\ORM\Repository\DefaultRepositoryFactory}
  *
  * @covers \Doctrine\ORM\Repository\DefaultRepositoryFactory
  */
-class DefaultRepositoryFactoryTest extends PHPUnit_Framework_TestCase
+class DefaultRepositoryFactoryTest extends TestCase
 {
     /**
      * @var \Doctrine\ORM\EntityManagerInterface|\PHPUnit_Framework_MockObject_MockObject
diff --git a/tests/Doctrine/Tests/OrmFunctionalTestCase.php b/tests/Doctrine/Tests/OrmFunctionalTestCase.php
index 9a684785378..88fbc43ca15 100644
--- a/tests/Doctrine/Tests/OrmFunctionalTestCase.php
+++ b/tests/Doctrine/Tests/OrmFunctionalTestCase.php
@@ -16,6 +16,7 @@
 use Doctrine\Tests\DbalTypes\Rot13Type;
 use Doctrine\Tests\EventListener\CacheMetadataListener;
 use Doctrine\Tests\Models;
+use PHPUnit\Framework\AssertionFailedError;
 
 /**
  * Base testcase class for all functional ORM testcases.
@@ -750,15 +751,15 @@ protected function _getEntityManager($config = null, $eventManager = null) {
     }
 
     /**
-     * @param \Exception $e
+     * @param \Throwable $e
      *
      * @return void
      *
-     * @throws \Exception
+     * @throws \Throwable
      */
-    protected function onNotSuccessfulTest($e)
+    protected function onNotSuccessfulTest(\Throwable $e)
     {
-        if ($e instanceof \PHPUnit_Framework_AssertionFailedError) {
+        if ($e instanceof AssertionFailedError) {
             throw $e;
         }