diff --git a/src/Bundle/ChillMainBundle/Tests/Export/SortExportElementTest.php b/src/Bundle/ChillMainBundle/Tests/Export/SortExportElementTest.php
index 02cf0a90f..cd820bb1c 100644
--- a/src/Bundle/ChillMainBundle/Tests/Export/SortExportElementTest.php
+++ b/src/Bundle/ChillMainBundle/Tests/Export/SortExportElementTest.php
@@ -102,7 +102,7 @@ class SortExportElementTest extends KernelTestCase
     private function makeTranslator(): TranslatorInterface
     {
         return new class () implements TranslatorInterface {
-            public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null)
+            public function trans(string $id, array $parameters = [], ?string $domain = null, ?string $locale = null)
             {
                 return $id;
             }
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php
index 6b75f6634..4e15b5286 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingPeriodStepHistoryAggregators/ByStepAggregatorTest.php
@@ -27,7 +27,7 @@ class ByStepAggregatorTest extends AbstractAggregatorTest
     public function getAggregator()
     {
         $translator = new class () implements TranslatorInterface {
-            public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null)
+            public function trans(string $id, array $parameters = [], ?string $domain = null, ?string $locale = null)
             {
                 return $id;
             }
diff --git a/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingPeriodStepHistoryFilters/ByStepFilterTest.php b/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingPeriodStepHistoryFilters/ByStepFilterTest.php
index 18415ac89..77ff35ad6 100644
--- a/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingPeriodStepHistoryFilters/ByStepFilterTest.php
+++ b/src/Bundle/ChillPersonBundle/Tests/Export/Filter/AccompanyingPeriodStepHistoryFilters/ByStepFilterTest.php
@@ -28,7 +28,7 @@ class ByStepFilterTest extends AbstractFilterTest
     public function getFilter()
     {
         $translator = new class () implements TranslatorInterface {
-            public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null)
+            public function trans(string $id, array $parameters = [], ?string $domain = null, ?string $locale = null)
             {
                 return $id;
             }