diff --git a/language_combination.info.yml b/language_combination.info.yml
index befe203..fa5c4dd 100644
--- a/language_combination.info.yml
+++ b/language_combination.info.yml
@@ -1,8 +1,7 @@
 name: 'Language Combination'
 description: 'Provides a field that allows users to select language combinations.'
 type: module
-core: '8.x'
-core_version_requirement: ^8 || ^9
+core_version_requirement: ^9.1 || ^10
 package: 'Field types'
 dependencies:
   - drupal:language
diff --git a/tests/src/Functional/LanguageCombinationTest.php b/tests/src/Functional/LanguageCombinationTest.php
index 4c1ff6f..c20fd1c 100644
--- a/tests/src/Functional/LanguageCombinationTest.php
+++ b/tests/src/Functional/LanguageCombinationTest.php
@@ -24,7 +24,7 @@ class LanguageCombinationTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public static $modules = [
+  protected static $modules = [
     'field',
     'node',
     'language',
@@ -34,7 +34,7 @@ class LanguageCombinationTest extends BrowserTestBase {
   /**
    * {@inheritdoc}
    */
-  public function setUp() {
+  public function setUp(): void {
     parent::setUp();
 
     $user = $this->drupalCreateUser([
@@ -94,7 +94,8 @@ class LanguageCombinationTest extends BrowserTestBase {
       'language_combination[0][language_source]' => 'fr',
       'language_combination[0][language_target]' => 'fr',
     ];
-    $this->drupalPostForm('node/add/article', $edit, t('Save'));
+    $this->drupalGet('node/add/article');
+    $this->submitForm($edit, t('Save'));
     $this->assertSession()->pageTextContains("The 'from' and 'to' language fields can't have the same value.");
   }
 
@@ -108,7 +109,8 @@ class LanguageCombinationTest extends BrowserTestBase {
       'language_combination[0][language_source]' => 'fr',
       'language_combination[0][language_target]' => 'de',
     ];
-    $this->drupalPostForm('node/add/article', $edit, t('Save'));
+    $this->drupalGet('node/add/article');
+    $this->submitForm($edit, t('Save'));
     $this->assertSession()->pageTextContains('French to German');
   }
 
@@ -124,7 +126,8 @@ class LanguageCombinationTest extends BrowserTestBase {
       'language_combination[1][language_source]' => 'en',
       'language_combination[1][language_target]' => 'de',
     ];
-    $this->drupalPostForm('node/add/article', $edit, t('Save'));
+    $this->drupalGet('node/add/article');
+    $this->submitForm($edit, t('Save'));
 
     $node = \Drupal::entityTypeManager()->getStorage('node')->load('1');