tests/src/FunctionalJavascript/ClaroBlockFilterTest.php      | 6 +-----
 tests/src/FunctionalJavascript/ClaroEntityDisplayTest.php    | 6 +-----
 tests/src/FunctionalJavascript/ClaroManageDisplayTest.php    | 6 +-----
 tests/src/FunctionalJavascript/ClaroMenuUiJavascriptTest.php | 6 +-----
 4 files changed, 4 insertions(+), 20 deletions(-)

diff --git a/tests/src/FunctionalJavascript/ClaroBlockFilterTest.php b/tests/src/FunctionalJavascript/ClaroBlockFilterTest.php
index da7b3ac..42732e9 100644
--- a/tests/src/FunctionalJavascript/ClaroBlockFilterTest.php
+++ b/tests/src/FunctionalJavascript/ClaroBlockFilterTest.php
@@ -27,10 +27,6 @@ class ClaroBlockFilterTest extends BlockFilterTest {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
-    parent::setUp();
-    $this->container->get('theme_installer')->install(['claro']);
-    $this->config('system.theme')->set('default', 'claro')->save();
-  }
+  protected $defaultTheme = 'claro';
 
 }
diff --git a/tests/src/FunctionalJavascript/ClaroEntityDisplayTest.php b/tests/src/FunctionalJavascript/ClaroEntityDisplayTest.php
index c77ea8b..acc3b02 100644
--- a/tests/src/FunctionalJavascript/ClaroEntityDisplayTest.php
+++ b/tests/src/FunctionalJavascript/ClaroEntityDisplayTest.php
@@ -27,11 +27,7 @@ class ClaroEntityDisplayTest extends EntityDisplayTest {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
-    parent::setUp();
-    $this->container->get('theme_installer')->install(['claro']);
-    $this->config('system.theme')->set('default', 'claro')->save();
-  }
+  protected $defaultTheme = 'claro';
 
   /**
    * Copied from parent.
diff --git a/tests/src/FunctionalJavascript/ClaroManageDisplayTest.php b/tests/src/FunctionalJavascript/ClaroManageDisplayTest.php
index bf96ef6..daecfd3 100644
--- a/tests/src/FunctionalJavascript/ClaroManageDisplayTest.php
+++ b/tests/src/FunctionalJavascript/ClaroManageDisplayTest.php
@@ -27,10 +27,6 @@ class ClaroManageDisplayTest extends ManageDisplayTest {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
-    parent::setUp();
-    $this->container->get('theme_installer')->install(['claro']);
-    $this->config('system.theme')->set('default', 'claro')->save();
-  }
+  protected $defaultTheme = 'claro';
 
 }
diff --git a/tests/src/FunctionalJavascript/ClaroMenuUiJavascriptTest.php b/tests/src/FunctionalJavascript/ClaroMenuUiJavascriptTest.php
index 019071e..f4afdba 100644
--- a/tests/src/FunctionalJavascript/ClaroMenuUiJavascriptTest.php
+++ b/tests/src/FunctionalJavascript/ClaroMenuUiJavascriptTest.php
@@ -23,11 +23,7 @@ class ClaroMenuUiJavascriptTest extends MenuUiJavascriptTest {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
-    parent::setUp();
-    $this->container->get('theme_installer')->install(['claro']);
-    $this->config('system.theme')->set('default', 'claro')->save();
-  }
+  protected $defaultTheme = 'claro';
 
   /**
    * Intentionally empty method.