diff --git a/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php b/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php
index aba0c2f..db6e19e 100644
--- a/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php
+++ b/core/lib/Drupal/Core/Extension/ExtensionDiscovery.php
@@ -218,7 +218,7 @@ public function setProfileDirectoriesFromSettings() {
     // For SimpleTest to be able to test modules packaged together with a
     // distribution we need to include the profile of the parent site (in
     // which test runs are triggered).
-    if (drupal_valid_test_ua() && !drupal_installation_attempted()) {
+    if (drupal_valid_test_ua()) {
       $testing_profile = \Drupal::config('simpletest.settings')->get('parent_profile');
       if ($testing_profile && $testing_profile != $profile) {
         $this->profileDirectories[] = drupal_get_path('profile', $testing_profile);