diff --git a/renderer.php b/renderer.php
index 99c1c33..709bb6c 100644
--- a/renderer.php
+++ b/renderer.php
@@ -134,7 +134,7 @@ public function matrix_table(question_attempt $qa, question_display_options $opt
         $response = $qa->get_last_qt_data();
         $caption = $options->add_question_identifier_to_label(get_string('answer'), false, true);
 
-        $table = html_writer::start_tag('fieldset', ['class' => 'ablock no-overflow visual-scroll-x']);
+        $table = html_writer::start_tag('fieldset', ['class' => 'ablock no-overflow']);
         $table .= html_writer::tag('legend', $caption, ['class' => 'sr-only']);
         $table .= html_writer::start_tag('div', ['class' => 'answer']);
 
diff --git a/tests/questiontype_test.php b/tests/questiontype_test.php
index 07aebdd..d0c288e 100644
--- a/tests/questiontype_test.php
+++ b/tests/questiontype_test.php
@@ -45,12 +45,14 @@ final class questiontype_test extends \advanced_testcase {
 
     #[\Override]
     protected function setUp(): void {
+        parent::setUp();
         $this->qtype = new qtype_oumatrix();
     }
 
     #[\Override]
     protected function tearDown(): void {
         $this->qtype = null;
+        parent::tearDown();
     }
 
     public function test_name(): void {