diff --git a/core/modules/simpletest/src/KernelTestBase.php b/core/modules/simpletest/src/KernelTestBase.php
index eaa545c..95b9291 100644
--- a/core/modules/simpletest/src/KernelTestBase.php
+++ b/core/modules/simpletest/src/KernelTestBase.php
@@ -193,6 +193,20 @@ protected function setUp() {
     }
     $this->kernel->boot();
 
+    // Ensure database tasks have been run.
+    require_once __DIR__ . '/../../../includes/install.inc';
+    $connection = Database::getConnection();
+    $errors = db_installer_object($connection->driver())->runTasks();
+    if (!empty($errors)) {
+      $this->fail('Failed to run installer database tasks: ' . implode(', ', $errors));
+    }
+
+    // After running the database tasks we have to reboot the container so that
+    // a new database connection is created.
+    $this->kernel->shutdown();
+    $this->kernel->boot();
+
+
     // Save the original site directory path, so that extensions in the
     // site-specific directory can still be discovered in the test site
     // environment.
@@ -208,7 +222,6 @@ protected function setUp() {
     $this->prepareConfigDirectories();
 
     // Set the request scope.
-    $this->container = $this->kernel->getContainer();
     $this->container->get('request_stack')->push($request);
 
     // Re-inject extension file listings into state, unless the key/value
@@ -225,14 +238,6 @@ protected function setUp() {
     // the event dispatcher which can prevent modules from registering events.
     \Drupal::service('config.storage')->write('core.extension', array('module' => array(), 'theme' => array()));
 
-    // Ensure database tasks have been run.
-    require_once __DIR__ . '/../../../includes/install.inc';
-    $connection = Database::getConnection();
-    $errors = db_installer_object($connection->driver())->runTasks();
-    if (!empty($errors)) {
-      $this->fail('Failed to run installer database tasks: ' . implode(', ', $errors));
-    }
-
     // Collect and set a fixed module list.
     $class = get_class($this);
     $modules = array();