diff --git a/rules/DowngradePhp73/Rector/List_/DowngradeListReferenceAssignmentRector.php b/rules/DowngradePhp73/Rector/List_/DowngradeListReferenceAssignmentRector.php
index 2082f264..e10b4561 100644
--- a/rules/DowngradePhp73/Rector/List_/DowngradeListReferenceAssignmentRector.php
+++ b/rules/DowngradePhp73/Rector/List_/DowngradeListReferenceAssignmentRector.php
@@ -234,15 +234,12 @@ private function createAssignRefArrayFromListReferences(
             // Nested list. Combine with the nodes from the recursive call
             /** @var List_ $nestedList */
             $nestedList = $listItem->value;
-            $listNestedArrayIndexes = array_merge($nestedArrayIndexes, [$key]);
-            $newNodes = array_merge(
-                $newNodes,
-                $this->createAssignRefArrayFromListReferences(
-                    $nestedList->items,
-                    $exprVariable,
-                    $listNestedArrayIndexes
-                )
-            );
+            $listNestedArrayIndexes = [...$nestedArrayIndexes, $key];
+            $newNodes = [...$newNodes, ...$this->createAssignRefArrayFromListReferences(
+                $nestedList->items,
+                $exprVariable,
+                $listNestedArrayIndexes
+            )];
         }
 
         return $newNodes;
diff --git a/rules/DowngradePhp74/Rector/ClassMethod/DowngradeContravariantArgumentTypeRector.php b/rules/DowngradePhp74/Rector/ClassMethod/DowngradeContravariantArgumentTypeRector.php
index 1e5ff413..30b6a9f0 100644
--- a/rules/DowngradePhp74/Rector/ClassMethod/DowngradeContravariantArgumentTypeRector.php
+++ b/rules/DowngradePhp74/Rector/ClassMethod/DowngradeContravariantArgumentTypeRector.php
@@ -173,7 +173,7 @@ private function getDifferentParamTypeFromAncestorClass(Param $param, ClassMetho
 
         // parent classes or implemented interfaces
         /** @var ClassReflection[] $parentClassReflections */
-        $parentClassReflections = array_merge($classReflection->getParents(), $classReflection->getInterfaces());
+        $parentClassReflections = [...$classReflection->getParents(), ...$classReflection->getInterfaces()];
 
         foreach ($parentClassReflections as $parentClassReflection) {
             $parentReflectionMethod = $this->resolveParentReflectionMethod($parentClassReflection, $methodName);
diff --git a/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php b/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php
index 25065ee1..676d92d0 100644
--- a/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php
+++ b/rules/DowngradePhp74/Rector/ClassMethod/DowngradeCovariantReturnTypeRector.php
@@ -173,7 +173,7 @@ private function resolveDifferentAncestorReturnType(
         $methodName = $this->getName($classMethod);
 
         /** @var ClassReflection[] $parentClassesAndInterfaces */
-        $parentClassesAndInterfaces = array_merge($classReflection->getParents(), $classReflection->getInterfaces());
+        $parentClassesAndInterfaces = [...$classReflection->getParents(), ...$classReflection->getInterfaces()];
 
         return $this->resolveMatchingReturnType($parentClassesAndInterfaces, $methodName, $classMethod, $returnType);
     }
diff --git a/rules/DowngradePhp74/Rector/Interface_/DowngradePreviouslyImplementedInterfaceRector.php b/rules/DowngradePhp74/Rector/Interface_/DowngradePreviouslyImplementedInterfaceRector.php
index 41683ca0..02880a6c 100644
--- a/rules/DowngradePhp74/Rector/Interface_/DowngradePreviouslyImplementedInterfaceRector.php
+++ b/rules/DowngradePhp74/Rector/Interface_/DowngradePreviouslyImplementedInterfaceRector.php
@@ -89,10 +89,7 @@ public function refactor(Node $node): ?Node
                 continue;
             }
 
-            $collectInterfaces = array_merge(
-                $collectInterfaces,
-                $this->familyRelationsAnalyzer->getClassLikeAncestorNames($extend)
-            );
+            $collectInterfaces = [...$collectInterfaces, ...$this->familyRelationsAnalyzer->getClassLikeAncestorNames($extend)];
         }
 
         if (! $isCleaned) {
diff --git a/rules/DowngradePhp80/Rector/Class_/DowngradePropertyPromotionRector.php b/rules/DowngradePhp80/Rector/Class_/DowngradePropertyPromotionRector.php
index 8ae6c568..b0b530dd 100644
--- a/rules/DowngradePhp80/Rector/Class_/DowngradePropertyPromotionRector.php
+++ b/rules/DowngradePhp80/Rector/Class_/DowngradePropertyPromotionRector.php
@@ -193,7 +193,7 @@ private function addPropertyAssignsToConstructorClassMethod(
 
         /** @var ClassMethod $constructorClassMethod */
         $constructorClassMethod = $class->getMethod(MethodName::CONSTRUCT);
-        $constructorClassMethod->stmts = array_merge($assigns, (array) $constructorClassMethod->stmts);
+        $constructorClassMethod->stmts = [...$assigns, ...(array) $constructorClassMethod->stmts];
     }
 
     /**