diff --git a/src/Bundle/ChillPersonBundle/Tests/AccompanyingPeriod/AccompanyingPeriodConfidentialTest.php b/src/Bundle/ChillPersonBundle/Tests/AccompanyingPeriod/AccompanyingPeriodConfidentialTest.php
index debc1ef50..9519f983c 100644
--- a/src/Bundle/ChillPersonBundle/Tests/AccompanyingPeriod/AccompanyingPeriodConfidentialTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/AccompanyingPeriod/AccompanyingPeriodConfidentialTest.php
@@ -27,7 +27,7 @@ final class AccompanyingPeriodConfidentialTest extends WebTestCase
     /**
      * Setup before the first test of this class (see phpunit doc).
      */
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         self::bootKernel();
     }
diff --git a/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingCourseApiControllerTest.php b/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingCourseApiControllerTest.php
index 8e3e61639..5b13c7e87 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingCourseApiControllerTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingCourseApiControllerTest.php
@@ -51,7 +51,7 @@ final class AccompanyingCourseApiControllerTest extends WebTestCase
     /**
      * Setup before the first test of this class (see phpunit doc).
      */
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         self::bootKernel();
     }
diff --git a/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingPeriodControllerTest.php b/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingPeriodControllerTest.php
index ae694fbfe..fd674f53b 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingPeriodControllerTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Controller/AccompanyingPeriodControllerTest.php
@@ -54,7 +54,7 @@ final class AccompanyingPeriodControllerTest extends WebTestCase
     /**
      * Setup before the first test of this class (see phpunit doc).
      */
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         self::bootKernel();
         self::$em = self::$kernel->getContainer()
diff --git a/src/Bundle/ChillPersonBundle/Tests/Controller/PersonAddressControllerTest.php b/src/Bundle/ChillPersonBundle/Tests/Controller/PersonAddressControllerTest.php
index 2aba394eb..f71ac9c12 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Controller/PersonAddressControllerTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Controller/PersonAddressControllerTest.php
@@ -40,7 +40,7 @@ final class PersonAddressControllerTest extends WebTestCase
      */
     protected $postalCode;
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         self::bootKernel();
 
diff --git a/src/Bundle/ChillReportBundle/Tests/Controller/ReportControllerTest.php b/src/Bundle/ChillReportBundle/Tests/Controller/ReportControllerTest.php
index 7958b6b3f..fed20de40 100644
--- a/src/Bundle/ChillReportBundle/Tests/Controller/ReportControllerTest.php
+++ b/src/Bundle/ChillReportBundle/Tests/Controller/ReportControllerTest.php
@@ -55,7 +55,7 @@ final class ReportControllerTest extends WebTestCase
 
     private static $user;
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
         self::bootKernel();
 
diff --git a/src/Bundle/ChillReportBundle/Tests/Security/Authorization/ReportVoterTest.php b/src/Bundle/ChillReportBundle/Tests/Security/Authorization/ReportVoterTest.php
index 40c22ee4b..9a78934db 100644
--- a/src/Bundle/ChillReportBundle/Tests/Security/Authorization/ReportVoterTest.php
+++ b/src/Bundle/ChillReportBundle/Tests/Security/Authorization/ReportVoterTest.php
@@ -41,7 +41,7 @@ final class ReportVoterTest extends KernelTestCase
      */
     protected $voter;
 
-    public static function setUpBeforeClass()
+    public static function setUpBeforeClass(): void
     {
     }