diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index fde304ce0..2fc26c793 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         php-versions: ['7.3', '7.4', '8.0']
-        drupal-core: ['9.2.x']
+        drupal-core: ['9.3.x']
         include:
           # Extra run to also test on latest Drupal 8 and PHP 7.2.
           - php-versions: '7.2'
diff --git a/phpstan.neon b/phpstan.neon
index cbc801c99..0ec078957 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -46,6 +46,13 @@ parameters:
     - """
       #^Call to deprecated function file_munge_filename\\(\\)#
       """
+    - """
+      #^Call to deprecated function drupal_get_path\\(\\)#
+      """
+    - """
+      #^Call to deprecated function file_create_url\\(\\)#
+      """
+    - "#^Call to an undefined method Drupal\\\\Tests\\\\graphql\\\\Kernel\\\\DataProducer\\\\EntityTest\\:\\:assertMatchesRegularExpression\\(\\)\\.$#"
     # Drupal allows object property access to custom fields, so we cannot fix
     # that.
     - "#^Property Drupal\\\\.+ \\(Drupal\\\\Core\\\\Field\\\\FieldItemListInterface\\) does not accept .+\\.$#"
diff --git a/tests/src/Kernel/DataProducer/EntityTest.php b/tests/src/Kernel/DataProducer/EntityTest.php
index 85447fd73..f80fe1ab3 100644
--- a/tests/src/Kernel/DataProducer/EntityTest.php
+++ b/tests/src/Kernel/DataProducer/EntityTest.php
@@ -377,7 +377,14 @@ public function testResolveEntityRendered(): void {
 
     // @todo Add metadata check.
     // $this->assertContains('node:1', $metadata->getCacheTags());
-    $this->assertStringContainsString('<a href="/node/1" rel="bookmark"><span>' . $this->node->getTitle() . '</span>', $result);
+    // Rendered output is slightly different in Drupal 8 vs. 9.
+    [$version] = explode('.', \Drupal::VERSION, 2);
+    if ($version == 8) {
+      $this->assertStringContainsString('<a href="/node/1" rel="bookmark"><span>' . $this->node->getTitle() . '</span>', $result);
+    }
+    else {
+      $this->assertMatchesRegularExpression('#<a href="/node/1" rel="bookmark">\s*<span>' . $this->node->getTitle() . '</span>#', $result);
+    }
   }
 
 }