diff --git a/web/modules/custom/talks/tests/src/Kernel/EventsAreReorderedByDateTest.php b/web/modules/custom/talks/tests/src/Kernel/EventsAreReorderedByDateTest.php
index 91f0236..0f0476b 100644
--- a/web/modules/custom/talks/tests/src/Kernel/EventsAreReorderedByDateTest.php
+++ b/web/modules/custom/talks/tests/src/Kernel/EventsAreReorderedByDateTest.php
@@ -7,7 +7,7 @@ use Drupal\paragraphs\ParagraphInterface;
 
 final class EventsAreReorderedByDateTest extends TalksTestBase {
 
-  public function testCreatingNode() {
+  public function testCreatingNode(): void {
     $events = [
       $this->createEvent([
         'field_date' => Carbon::today()->addWeeks(2),
@@ -50,7 +50,7 @@ final class EventsAreReorderedByDateTest extends TalksTestBase {
     );
   }
 
-  public function testUpdatingNode() {
+  public function testUpdatingNode(): void {
     $events = [
       $this->createEvent([
         'field_date' => Carbon::today()->addWeeks(2),
diff --git a/web/modules/custom/talks/tests/src/Kernel/Repository/TalkRepositoryTest.php b/web/modules/custom/talks/tests/src/Kernel/Repository/TalkRepositoryTest.php
index 13c43b2..2f6ceb1 100644
--- a/web/modules/custom/talks/tests/src/Kernel/Repository/TalkRepositoryTest.php
+++ b/web/modules/custom/talks/tests/src/Kernel/Repository/TalkRepositoryTest.php
@@ -17,7 +17,7 @@ final class TalkRepositoryTest extends TalksTestBase {
   private TalkRepository $talkRepository;
 
   /** @test */
-  public function get_all_talks() {
+  public function get_all_talks(): void {
     $this->createTalk(['title' => 'TDD - Test Driven Drupal']);
     $this->createTalk(['title' => 'Taking Flight with Tailwind CSS']);
     $this->createTalk(['title' => 'Upgrading to Drupal 9']);
@@ -36,7 +36,7 @@ final class TalkRepositoryTest extends TalksTestBase {
   }
 
   /** @test */
-  public function get_all_published_talks() {
+  public function get_all_published_talks(): void {
     $this->createTalk([
       'title' => 'TDD - Test Driven Drupal',
       'status' => NodeInterface::PUBLISHED,
@@ -54,7 +54,7 @@ final class TalkRepositoryTest extends TalksTestBase {
   }
 
   /** @test */
-  public function it_only_returns_talk_nodes() {
+  public function it_only_returns_talk_nodes(): void {
     $this->createNode(['type' => 'page']);
 
     $talks = $this->talkRepository->getAll();
diff --git a/web/modules/custom/talks/tests/src/Kernel/TalksPageSortTest.php b/web/modules/custom/talks/tests/src/Kernel/TalksPageSortTest.php
index 4c3c796..43d3dd4 100644
--- a/web/modules/custom/talks/tests/src/Kernel/TalksPageSortTest.php
+++ b/web/modules/custom/talks/tests/src/Kernel/TalksPageSortTest.php
@@ -18,7 +18,7 @@ final class TalksPageSortTest extends TalksTestBase {
   /**
    * @test
    */
-  public function upcoming_talks_are_shown_first_followed_by_past_talks_and_ordered_by_distance() {
+  public function upcoming_talks_are_shown_first_followed_by_past_talks_and_ordered_by_distance(): void {
     $this->createTalk([
       'field_event_date' => Carbon::today()->addDays(4)->getTimestamp(),
     ]);
diff --git a/web/modules/custom/talks/tests/src/Kernel/UpdatesTalkCreatedDateTest.php b/web/modules/custom/talks/tests/src/Kernel/UpdatesTalkCreatedDateTest.php
index 68cfba6..5beeeac 100644
--- a/web/modules/custom/talks/tests/src/Kernel/UpdatesTalkCreatedDateTest.php
+++ b/web/modules/custom/talks/tests/src/Kernel/UpdatesTalkCreatedDateTest.php
@@ -7,7 +7,7 @@ use Drupal\datetime\Plugin\Field\FieldType\DateTimeItemInterface;
 
 final class UpdatesTalkCreatedDateTest extends TalksTestBase {
 
-  public function testCreatingNode() {
+  public function testCreatingNode(): void {
     $eventDate = Carbon::today()->addWeek();
     $eventDateFormat = $eventDate
       ->format(DateTimeItemInterface::DATE_STORAGE_FORMAT);
@@ -22,7 +22,7 @@ final class UpdatesTalkCreatedDateTest extends TalksTestBase {
     $this->assertEqual($eventDateTimestamp, $talk->getCreatedTime());
   }
 
-  public function testUpdatingNode() {
+  public function testUpdatingNode(): void {
     $talk = $this->createTalk();
     $originalCreatedTime = $talk->getCreatedTime();