diff --git a/core/modules/system/src/Tests/Installer/DistributionProfileExistingSettingsTest.php b/core/modules/system/src/Tests/Installer/DistributionProfileExistingSettingsTest.php
index bf3205c..bb73472 100644
--- a/core/modules/system/src/Tests/Installer/DistributionProfileExistingSettingsTest.php
+++ b/core/modules/system/src/Tests/Installer/DistributionProfileExistingSettingsTest.php
@@ -128,7 +128,7 @@ public function testInstalled() {
     $this->rebuildContainer();
     $this->pass('Container can be rebuilt even though distribution is not written to settings.php.');
 
-    // Create another installation profile which is a distrubtion.
+    // Create another installation profile which is a distribution.
     $info = [
       'type' => 'profile',
       'core' => \Drupal::CORE_COMPATIBILITY,
@@ -145,6 +145,11 @@ public function testInstalled() {
     mkdir($path, 0777, TRUE);
     file_put_contents("$path/mydistro2.info.yml", Yaml::encode($info));
 
+    // Ensure that no install profile is configured yet.
+    \Drupal::configFactory()->getEditable('core.extension')
+      ->set('profile', NULL)
+      ->save();
+
     // Test that a site will multiple distributions will get an exception when
     // rebuilding the container. In order to do this we need to reset the
     // discovered files in ExtensionDiscovery.
diff --git a/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php b/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php
index 879e7a0..56f913a 100644
--- a/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/DefaultConfigTest.php
@@ -27,6 +27,7 @@ public function testConfigIsEmpty() {
     $expected = array(
       'module' => array(),
       'theme' => array(),
+      'profile' => '',
     );
     $this->assertEquals($expected, $config);
   }