diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/abstract_class.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/abstract_class.php.inc
index ba16717..bbb45f1 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/abstract_class.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/abstract_class.php.inc
@@ -9,7 +9,7 @@ abstract class Bar implements Type
         mixed $value,
         mixed $currentUser,
         ValueObject $object,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
@@ -28,7 +28,7 @@ abstract class Bar implements Type
         mixed $value,
         mixed $currentUser,
         object $object,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_class.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_class.php.inc
index 37ea546..1a07de8 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_class.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_class.php.inc
@@ -9,7 +9,7 @@ class Foo implements Type
         mixed $value,
         mixed $currentUser,
         ValueObject $differentName,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
@@ -28,7 +28,7 @@ class Foo implements Type
         mixed $value,
         mixed $currentUser,
         object $differentName,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_interface.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_interface.php.inc
index 041e34e..7de7c51 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_interface.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/basic_interface.php.inc
@@ -9,7 +9,7 @@ interface SubType extends Type
         mixed $value,
         mixed $currentUser,
         ValueObject $object,
-        array $targets = null,
+        ?array $targets = null,
         bool $foo = false
     ): ?bool;
 }
@@ -27,7 +27,7 @@ interface SubType extends Type
         mixed $value,
         mixed $currentUser,
         object $object,
-        array $targets = null,
+        ?array $targets = null,
         bool $foo = false
     ): ?bool;
 }
diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_extends_abstract_with_interface.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_extends_abstract_with_interface.php.inc
index 9c37fc2..faf8710 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_extends_abstract_with_interface.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_extends_abstract_with_interface.php.inc
@@ -9,7 +9,7 @@ class Foo extends AbstractType
         mixed $value,
         mixed $currentUser,
         ValueObject $differentName,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
@@ -28,7 +28,7 @@ class Foo extends AbstractType
         mixed $value,
         mixed $currentUser,
         object $differentName,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_should_not_be_changed.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_should_not_be_changed.php.inc
index 3ac21b9..899a9bd 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_should_not_be_changed.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_that_should_not_be_changed.php.inc
@@ -7,7 +7,7 @@ class ShouldNotBeChanged {
         mixed $value,
         mixed $currentUser,
         ValueObject $object,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {}
 }
 
diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_with_param_that_should_not_be_changed.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_with_param_that_should_not_be_changed.php.inc
index 6f9f981..be401b1 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_with_param_that_should_not_be_changed.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/class_with_param_that_should_not_be_changed.php.inc
@@ -8,7 +8,7 @@ class WithParamThatShouldNotBeChanged implements Type {
         mixed $value,
         mixed $currentUser,
         object $object,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {}
 }
 
diff --git a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/extending_class.php.inc b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/extending_class.php.inc
index bf475a0..22e27ca 100644
--- a/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/extending_class.php.inc
+++ b/tests/lib/Rule/ChangeArgumentTypeRector/Fixture/extending_class.php.inc
@@ -9,7 +9,7 @@ final class FooBar extends BasicType
         mixed $value,
         mixed $currentUser,
         ValueObject $object,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }
@@ -28,7 +28,7 @@ final class FooBar extends BasicType
         mixed $value,
         mixed $currentUser,
         object $object,
-        array $targets = null
+        ?array $targets = null
     ): ?bool {
         return null;
     }