diff --git a/floating_block.info.yml b/floating_block.info.yml
index bd1f85872bb6edabab39405542528e63e3fe7dad..54f2876f5f602cbc0e578ca945c2174c19962928 100755
--- a/floating_block.info.yml
+++ b/floating_block.info.yml
@@ -1,8 +1,7 @@
 name: Floating Block
 type: module
 description: Allows regions of the site to float.
-core: 8.x
-core_version_requirement: ^8 || ^9
+core_version_requirement: ^9.3 || ^10
 dependencies:
   - drupal:block
 configure: admin/config/user-interface/floating-block
diff --git a/floating_block.module b/floating_block.module
index bedf16d522705f03f2023835302ac4020d035e72..b7e8bc176033baa44633a4c1f4317d1e91f802c9 100755
--- a/floating_block.module
+++ b/floating_block.module
@@ -60,7 +60,7 @@ function floating_block_library_info() {
     'title' => 'Floating Block',
     'version' => 0.1,
     'js' => [
-      drupal_get_path('module', 'floating_block') . '/floating_block.js' => [],
+      \Drupal::service('extension.list.module')->getPath('floating_block') . '/floating_block.js' => [],
     ],
     'dependencies' => [
       ['system', 'jquery'],
diff --git a/src/Helper.php b/src/Helper.php
index 8ee3864c2edff68e741bb843ff94749827458d7c..0fe17ef115cd54093099e5fcd946c493641ca6d1 100644
--- a/src/Helper.php
+++ b/src/Helper.php
@@ -16,7 +16,7 @@ class Helper implements HelperInterface {
       return [];
     }
 
-    $floating_blocks = preg_split("/(\r\n|\n)/", $floating_block_data, NULL, PREG_SPLIT_NO_EMPTY);
+    $floating_blocks = preg_split("/(\r\n|\n)/", $floating_block_data, -1, PREG_SPLIT_NO_EMPTY);
     $output = [];
 
     foreach ($floating_blocks as $floating_block) {
diff --git a/tests/src/Functional/Form/SettingsFormTest.php b/tests/src/Functional/Form/SettingsFormTest.php
index cdae2c652671e7516201408b191d215d31cee674..f93ec8191c15c55606325b79347f873deecaa315 100644
--- a/tests/src/Functional/Form/SettingsFormTest.php
+++ b/tests/src/Functional/Form/SettingsFormTest.php
@@ -30,7 +30,7 @@ class SettingsFormTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
+  protected function setUp(): void {
     parent::setUp();
 
     // Create an user with admin privileges.
diff --git a/tests/src/Functional/InstallTest.php b/tests/src/Functional/InstallTest.php
index 43d2574b5090b0f9577836caf7cff68bbd0fcc77..8b61d936ce219448057946dcbbfec94ff21ed068 100644
--- a/tests/src/Functional/InstallTest.php
+++ b/tests/src/Functional/InstallTest.php
@@ -38,7 +38,7 @@ class InstallTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public function setUp() {
+  public function setUp(): void {
     parent::setUp();
     $this->moduleInstaller = $this->container->get('module_installer');
     $this->moduleHandler = $this->container->get('module_handler');
@@ -60,7 +60,7 @@ class InstallTest extends BrowserTestBase {
 
     // Make sure that by default the config page is not accessible.
     $this->drupalGet('admin/config/user-interface/floating-block');
-    $this->assertResponse(403, 'No access to the Floating Block settings form.');
+    $this->assertSession()->statusCodeEquals(403, 'No access to the Floating Block settings form.');
   }
 
 }
diff --git a/tests/src/Unit/HelperTest.php b/tests/src/Unit/HelperTest.php
index 26d7d4e34cc27fde777be8ede2ed5d62865d59c0..1a0bb0d308bc1a7e86fef3bcd8e94969eeb7678a 100644
--- a/tests/src/Unit/HelperTest.php
+++ b/tests/src/Unit/HelperTest.php
@@ -21,7 +21,7 @@ class HelperTest extends UnitTestCase {
   /**
    * {@inheritdoc}
    */
-  protected function setUp() {
+  protected function setUp(): void {
     parent::setUp();
 
     $this->helper = new Helper();