Make sure to destroy the environment in integration tests.

tests/PHPUnit/Framework/Fixture.php

@@ -327,6 +327,8 @@ class Fixture extends \PHPUnit_Framework_Assert
         $this->clearInMemoryCaches();
 
         Log::unsetInstance();
+
+        $this->destroyEnvironment();
     }
 
     public function clearInMemoryCaches()
@@ -908,4 +910,14 @@ class Fixture extends \PHPUnit_Framework_Assert
         $this->piwikEnvironment = new Environment($environment = null, $this->extraDefinitions);
         $this->piwikEnvironment->init();
     }
+
+    public function destroyEnvironment()
+    {
+        if ($this->piwikEnvironment === null) {
+            return;
+        }
+
+        $this->piwikEnvironment->destroy();
+        $this->piwikEnvironment = null;
+    }
 }

tests/PHPUnit/Framework/TestCase/IntegrationTestCase.php

@@ -76,9 +76,10 @@ abstract class IntegrationTestCase extends SystemTestCase
     {
         parent::setUp();
 
-        self::$fixture->extraDefinitions = array_merge(static::provideContainerConfigBeforeClass(), $this->provideContainerConfig());
-        self::$fixture->createEnvironmentInstance();
+        static::$fixture->extraDefinitions = array_merge(static::provideContainerConfigBeforeClass(), $this->provideContainerConfig());
+        static::$fixture->createEnvironmentInstance();
 
+        Db::createDatabaseObject();
         Fixture::loadAllPlugins(new TestingEnvironmentVariables(), get_class($this), self::$fixture->extraPluginsToLoad);
 
         Access::getInstance()->setSuperUserAccess(true);
@@ -98,6 +99,7 @@ abstract class IntegrationTestCase extends SystemTestCase
     public function tearDown()
     {
         static::$fixture->clearInMemoryCaches();
+        static::$fixture->destroyEnvironment();
 
         parent::tearDown();
     }