diff --git a/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php b/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php
index b31b9bafb43b8f7234ff6c654bdcd63e75828f0b..9e760262ae8fe549e228cda83f0f9b16533fa078 100644
--- a/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php
+++ b/core/tests/Drupal/FunctionalTests/Theme/OliveroTest.php
@@ -27,6 +27,8 @@ class OliveroTest extends BrowserTestBase {
    */
   protected static $modules = [
     'olivero_test',
+    'pager_test',
+    'dblog',
   ];
 
   /**
@@ -129,4 +131,33 @@ public function testIsUninstallable() {
     $this->assertSession()->pageTextContains('The Olivero theme has been uninstalled.');
   }
 
+  /**
+   * Tests pager attribute is present using pager_test.
+   */
+  public function testPagerAttribute(): void {
+    // Insert 300 log messages.
+    $logger = \Drupal::logger('pager_test');
+    for ($i = 0; $i < 300; $i++) {
+      $logger->debug($this->randomString());
+    }
+
+    $this->drupalLogin($this->drupalCreateUser(['access site reports']));
+
+    $this->drupalGet('pager-test/multiple-pagers', ['query' => ['page' => 1]]);
+    $this->assertSession()->statusCodeEquals(200);
+    $elements = $this->xpath('//ul[contains(@class, :class)]/li', [':class' => 'pager__items']);
+    $this->assertNotEmpty($elements, 'Pager found.');
+
+    // Check all links for pager-test attribute.
+    foreach ($elements as $element) {
+      $link = $element->find('css', 'a');
+      // Current page does not have a link.
+      if (empty($link)) {
+        continue;
+      }
+      $this->assertTrue($link->hasAttribute('pager-test'), 'Pager item has attribute pager-test');
+      $this->assertTrue($link->hasClass('lizards'));
+    }
+  }
+
 }
diff --git a/core/themes/olivero/templates/navigation/pager.html.twig b/core/themes/olivero/templates/navigation/pager.html.twig
index 29d011513e10c9f039a2bfbab4b57bb62c5396e8..2eb131e52cac4dd98eaa873abd6c797522fe76e5 100644
--- a/core/themes/olivero/templates/navigation/pager.html.twig
+++ b/core/themes/olivero/templates/navigation/pager.html.twig
@@ -38,7 +38,7 @@
       {% if items.first %}
         {% apply spaceless %}
           <li class="pager__item pager__item--control pager__item--first">
-            <a href="{{ items.first.href }}" class="pager__link" title="{{ 'Go to first page'|t }}"{{ items.first.attributes|without('href', 'title', 'class') }}>
+            <a href="{{ items.first.href }}" title="{{ 'Go to first page'|t }}"{{ items.first.attributes|without('href', 'title').addClass('pager__link') }}>
               <span class="visually-hidden">{{ 'First page'|t }}</span>
               {% include "@olivero/../images/pager-first.svg" %}
             </a>
@@ -50,7 +50,7 @@
       {% if items.previous %}
         {% apply spaceless %}
           <li class="pager__item pager__item--control pager__item--previous">
-            <a href="{{ items.previous.href }}" class="pager__link" title="{{ 'Go to previous page'|t }}" rel="prev"{{ items.previous.attributes|without('href', 'title', 'rel', 'class') }}>
+            <a href="{{ items.previous.href }}" title="{{ 'Go to previous page'|t }}" rel="prev"{{ items.previous.attributes|without('href', 'title', 'rel').addClass('pager__link') }}>
               <span class="visually-hidden">{{ 'Previous page'|t }}</span>
               {% include "@olivero/../images/pager-previous.svg" %}
             </a>
@@ -73,7 +73,7 @@
               {% set title = 'Go to page @key'|t({'@key': key}) %}
             {% endif %}
             {% if current != key %}
-              <a href="{{ item.href }}" class="pager__link{{ current == key ? ' is-active' }}" title="{{ title }}"{{ item.attributes|without('href', 'title', 'class') }}>
+              <a href="{{ item.href }}" title="{{ title }}"{{ item.attributes|without('href', 'title').addClass('pager__link', current == key ? ' is-active') }}>
             {% endif %}
             <span class="visually-hidden">
               {{ current == key ? 'Current page'|t : 'Page'|t }}
@@ -95,7 +95,7 @@
       {% if items.next %}
         {% apply spaceless %}
           <li class="pager__item pager__item--control pager__item--next">
-            <a href="{{ items.next.href }}" class="pager__link" title="{{ 'Go to next page'|t }}" rel="next"{{ items.next.attributes|without('href', 'title', 'rel', 'class') }}>
+            <a href="{{ items.next.href }}" title="{{ 'Go to next page'|t }}" rel="next"{{ items.next.attributes|without('href', 'title', 'rel').addClass('pager__link') }}>
               <span class="visually-hidden">{{ 'Next page'|t }}</span>
               {% include "@olivero/../images/pager-previous.svg" %}
             </a>
@@ -107,7 +107,7 @@
       {% if items.last %}
         {% apply spaceless %}
           <li class="pager__item pager__item--control pager__item--last">
-            <a href="{{ items.last.href }}" class="pager__link" title="{{ 'Go to last page'|t }}"{{ items.last.attributes|without('href', 'title', 'class') }}>
+            <a href="{{ items.last.href }}" title="{{ 'Go to last page'|t }}"{{ items.last.attributes|without('href', 'title').addClass('pager__link') }}>
               <span class="visually-hidden">{{ 'Last page'|t }}</span>
               {% include "@olivero/../images/pager-first.svg" %}
             </a>