diff --git a/src/Anonymization/Anonymizer/Options.php b/src/Anonymization/Anonymizer/Options.php
index 3d490fce..cb131f17 100644
--- a/src/Anonymization/Anonymizer/Options.php
+++ b/src/Anonymization/Anonymizer/Options.php
@@ -56,7 +56,7 @@ public function toDisplayString(): string
         ));
     }
 
-    public function getString(string $name, string $default = null, bool $required = false): ?string
+    public function getString(string $name, ?string $default = null, bool $required = false): ?string
     {
         $value = $this->get($name, $default, $required);
 
@@ -71,7 +71,7 @@ public function getString(string $name, string $default = null, bool $required =
         throw new \InvalidArgumentException(\sprintf("Option '%s' must be a string", $name));
     }
 
-    public function getBool(string $name, bool $default = null, bool $required = false): ?bool
+    public function getBool(string $name, ?bool $default = null, bool $required = false): ?bool
     {
         $value = $this->get($name, $default, $required);
 
@@ -93,7 +93,7 @@ public function getBool(string $name, bool $default = null, bool $required = fal
         return (bool) $value;
     }
 
-    public function getInt(string $name, int $default = null, bool $required = false): ?int
+    public function getInt(string $name, ?int $default = null, bool $required = false): ?int
     {
         $value = $this->get($name, $default, $required);
 
@@ -108,7 +108,7 @@ public function getInt(string $name, int $default = null, bool $required = false
         throw new \InvalidArgumentException(\sprintf("Option '%s' must be an int", $name));
     }
 
-    public function getFloat(string $name, float $default = null, bool $required = false): ?float
+    public function getFloat(string $name, ?float $default = null, bool $required = false): ?float
     {
         $value = $this->get($name, $default, $required);
 
@@ -124,7 +124,7 @@ public function getFloat(string $name, float $default = null, bool $required = f
 
     }
 
-    public function getDate(string $name, \DateTimeImmutable $default = null, bool $required = false): ?\DateTimeImmutable
+    public function getDate(string $name, ?\DateTimeImmutable $default = null, bool $required = false): ?\DateTimeImmutable
     {
         $value = $this->get($name, $default, $required);
 
@@ -143,7 +143,7 @@ public function getDate(string $name, \DateTimeImmutable $default = null, bool $
         }
     }
 
-    public function getInterval(string $name, \DateInterval $default = null, bool $required = false): ?\DateInterval
+    public function getInterval(string $name, ?\DateInterval $default = null, bool $required = false): ?\DateInterval
     {
         $value = $this->get($name, $default, $required);
 
diff --git a/src/Storage/Storage.php b/src/Storage/Storage.php
index 9d693d5a..206a0745 100644
--- a/src/Storage/Storage.php
+++ b/src/Storage/Storage.php
@@ -23,7 +23,7 @@ public function listBackups(
         string $connectionName = 'default',
         string $extension = 'sql',
         bool $onlyExpired = false,
-        string $preserveFile = null
+        ?string $preserveFile = null
     ): array {
         $config = $this->configReg->getConnectionConfig($connectionName);
         $storagePath = \rtrim($config->getStorageDirectory(), '/');
diff --git a/tests/Mock/TestingExecutionContext.php b/tests/Mock/TestingExecutionContext.php
index 7811536e..87c43adf 100644
--- a/tests/Mock/TestingExecutionContext.php
+++ b/tests/Mock/TestingExecutionContext.php
@@ -43,7 +43,7 @@ public function buildViolation(string $message, array $parameters = []): Constra
             null,
             new class () implements TranslatorInterface {
                 #[\Override]
-                public function trans(string $id, array $parameters = [], string $domain = null, string $locale = null): string
+                public function trans(string $id, array $parameters = [], ?string $domain = null, ?string $locale = null): string
                 {
                     return $id;
                 }
@@ -71,7 +71,7 @@ public function getObject(): ?object
     }
 
     #[\Override]
-    public function setNode(mixed $value, ?object $object, MetadataInterface $metadata = null, string $propertyPath): void {}
+    public function setNode(mixed $value, ?object $object, ?MetadataInterface $metadata, string $propertyPath): void {}
 
     #[\Override]
     public function setGroup(?string $group): void {}