Install and activate plugins during tests after 'updating' the database.

tests/PHPUnit/Framework/Fixture.php

@@ -241,10 +241,10 @@ class Fixture extends \PHPUnit_Framework_Assert
 
         static::loadAllPlugins($this->getTestEnvironment(), $this->testCaseClass, $this->extraPluginsToLoad);
 
-        self::installAndActivatePlugins();
-
         self::updateDatabase();
 
+        self::installAndActivatePlugins();
+
         $_GET = $_REQUEST = array();
         $_SERVER['HTTP_REFERER'] = '';