core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php             | 5 +++--
 core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php  | 2 ++
 .../Drupal/FunctionalTests/Installer/InstallerTranslationTest.php  | 7 +------
 core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBase.php    | 5 -----
 4 files changed, 6 insertions(+), 13 deletions(-)

diff --git a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
index 8b050f749b..3154b7f0d0 100644
--- a/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
+++ b/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php
@@ -421,7 +421,8 @@ protected function initKernel(Request $request) {
   protected function installDefaultThemeFromClassProperty(ContainerInterface $container) {
     // Use the install profile to determine the default theme if configured and
     // not already specified.
-    $default_install_path = drupal_get_path('profile', $this->profile) . '/' . InstallStorage::CONFIG_INSTALL_DIRECTORY;
+    $profile = $container->getParameter('install_profile');
+    $default_install_path = drupal_get_path('profile', $profile) . '/' . InstallStorage::CONFIG_INSTALL_DIRECTORY;
     $profile_config_storage = new FileStorage($default_install_path, StorageInterface::DEFAULT_COLLECTION);
     if (!isset($this->defaultTheme) && $profile_config_storage->exists('system.theme')) {
       $this->defaultTheme = $profile_config_storage->read('system.theme')['default'];
@@ -433,7 +434,7 @@ protected function installDefaultThemeFromClassProperty(ContainerInterface $cont
       // on Drupal 8 automatically get 'classy' set, and other profiles use
       // 'stark'.
       @trigger_error('Drupal\Tests\BrowserTestBase::$defaultTheme is required in drupal:9.0.0 when using an install profile that does not set a default theme. See https://www.drupal.org/node/2352949, which includes recommendations on which theme to use.', E_USER_DEPRECATED);
-      $this->defaultTheme = $this->profile === 'testing' ? 'classy' : 'stark';
+      $this->defaultTheme = $profile === 'testing' ? 'classy' : 'stark';
     }
 
     // Ensure the default theme is installed.
diff --git a/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php b/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php
index eaccc1bdf2..a41eea79d8 100644
--- a/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php
+++ b/core/tests/Drupal/FunctionalTests/Installer/InstallerTestBase.php
@@ -191,6 +191,8 @@ protected function setUp() {
         ->getEditable('system.mail')
         ->set('interface.default', 'test_mail_collector')
         ->save();
+
+      $this->installDefaultThemeFromClassProperty($this->container);
     }
   }
 
diff --git a/core/tests/Drupal/FunctionalTests/Installer/InstallerTranslationTest.php b/core/tests/Drupal/FunctionalTests/Installer/InstallerTranslationTest.php
index 689117096d..55ce6b534c 100644
--- a/core/tests/Drupal/FunctionalTests/Installer/InstallerTranslationTest.php
+++ b/core/tests/Drupal/FunctionalTests/Installer/InstallerTranslationTest.php
@@ -19,11 +19,6 @@ class InstallerTranslationTest extends InstallerTestBase {
    */
   protected $langcode = 'de';
 
-  /**
-   * {@inheritdoc}
-   */
-  protected $profile = 'standard';
-
   /**
    * {@inheritdoc}
    */
@@ -69,7 +64,7 @@ protected function setUpSettings() {
    * Verifies the expected behaviors of the installation result.
    */
   public function testInstaller() {
-    $this->assertUrl('node');
+    $this->assertUrl('user/1');
     $this->assertResponse(200);
 
     // Verify German was configured but not English.
diff --git a/core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBase.php b/core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBase.php
index 80f3ea7846..d7bad28513 100644
--- a/core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBase.php
+++ b/core/tests/Drupal/FunctionalTests/Update/UpdatePathTestBase.php
@@ -74,11 +74,6 @@ abstract class UpdatePathTestBase extends BrowserTestBase {
    */
   protected $installProfile = 'standard';
 
-  /**
-   * {@inheritdoc}
-   */
-  protected $profile = 'standard';
-
   /**
    * Flag that indicates whether the child site has been updated.
    *