diff --git a/src/Bundle/ChillMainBundle/Phonenumber/PhoneNumberHelperInterface.php b/src/Bundle/ChillMainBundle/Phonenumber/PhoneNumberHelperInterface.php
index bc71ddf3d..eeab9c38d 100644
--- a/src/Bundle/ChillMainBundle/Phonenumber/PhoneNumberHelperInterface.php
+++ b/src/Bundle/ChillMainBundle/Phonenumber/PhoneNumberHelperInterface.php
@@ -22,7 +22,7 @@ use libphonenumber\PhoneNumber;
  */
 interface PhoneNumberHelperInterface
 {
-    public function format(PhoneNumber $phonenumber): string;
+    public function format(PhoneNumber $phoneNumber): string;
 
     /**
      * Get type (mobile, landline, ...) for phone number.
diff --git a/src/Bundle/ChillMainBundle/Serializer/Normalizer/PhonenumberNormalizer.php b/src/Bundle/ChillMainBundle/Serializer/Normalizer/PhonenumberNormalizer.php
index ac4f3fa61..c03a8849c 100644
--- a/src/Bundle/ChillMainBundle/Serializer/Normalizer/PhonenumberNormalizer.php
+++ b/src/Bundle/ChillMainBundle/Serializer/Normalizer/PhonenumberNormalizer.php
@@ -34,7 +34,7 @@ class PhonenumberNormalizer implements NormalizerInterface, DenormalizerInterfac
     /**
      * @throws UnexpectedValueException
      */
-    public function denormalize($data, $class, $format = null, array $context = [])
+    public function denormalize($data, $type, $format = null, array $context = [])
     {
         try {
             return $this->phoneNumberUtil->parse($data, $this->defaultCarrierCode);
diff --git a/src/Bundle/ChillPersonBundle/Tests/Entity/AccompanyingPeriodTest.php b/src/Bundle/ChillPersonBundle/Tests/Entity/AccompanyingPeriodTest.php
index 1db356018..0b66d8648 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Entity/AccompanyingPeriodTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Entity/AccompanyingPeriodTest.php
@@ -158,7 +158,7 @@ final class AccompanyingPeriodTest extends \PHPUnit\Framework\TestCase
 
         $participationL = $period->closeParticipationFor($person);
         $this->assertSame($participationL, $participation);
-        $this->assertTrue($participation->getEndDate() instanceof DateTimeInterface);
+        $this->assertTrue($participationL->getEndDate() instanceof DateTimeInterface);
 
         $participation = $period->getOpenParticipationContainsPerson($person);
         $this->assertNull($participation);