diff --git a/libraries.module b/libraries.module
index e7aee51..beb5d91 100644
--- a/libraries.module
+++ b/libraries.module
@@ -36,7 +36,7 @@ function libraries_library_info_build() {
       // the build process, but should be logged.
       if ($e instanceof LibraryIdAccessorInterface || $e instanceof LibraryAccessorInterface) {
         $libraries_with_errors[] = $external_library_id;
-        watchdog_exception('libraries', $e);
+        \Drupal\Component\Utility\DeprecationHelper::backwardsCompatibleCall(\Drupal::VERSION, '10.1.0', fn() => \Drupal\Core\Utility\Error::logException(\Drupal::logger('libraries'), $e), fn() => watchdog_exception('libraries', $e));
       }
       else {
         // Re-throw exceptions that are not library-specific.
diff --git a/src/Config/LibrariesConfigSubscriber.php b/src/Config/LibrariesConfigSubscriber.php
index 6578f42..45030ad 100644
--- a/src/Config/LibrariesConfigSubscriber.php
+++ b/src/Config/LibrariesConfigSubscriber.php
@@ -44,7 +44,7 @@ class LibrariesConfigSubscriber implements EventSubscriberInterface {
   /**
    * {@inheritdoc}
    */
-  public static function getSubscribedEvents() {
+  public static function getSubscribedEvents(): array {
     return [ConfigEvents::SAVE => 'onConfigSave'];
   }
 
diff --git a/tests/src/Unit/Plugin/libraries/VersionDetector/LinePatternDetectorTest.php b/tests/src/Unit/Plugin/libraries/VersionDetector/LinePatternDetectorTest.php
index ab9ed61..0a4083e 100644
--- a/tests/src/Unit/Plugin/libraries/VersionDetector/LinePatternDetectorTest.php
+++ b/tests/src/Unit/Plugin/libraries/VersionDetector/LinePatternDetectorTest.php
@@ -67,7 +67,7 @@ class LinePatternDetectorTest extends UnitTestCase {
   /**
    * @return array
    */
-  public function providerTestDetectVersionNoVersion() {
+  public static function providerTestDetectVersionNoVersion() {
     $test_cases = [];
 
     $configuration = [
@@ -127,7 +127,7 @@ EOF
   /**
    * @return array
    */
-  public function providerTestDetectVersion() {
+  public static function providerTestDetectVersion() {
     $test_cases = [];
 
     $configuration = [