diff --git a/examples/MergeIsCandidateRector.php b/examples/MergeIsCandidateRector.php
index 3d3e5c8831f..5bbad21587e 100644
--- a/examples/MergeIsCandidateRector.php
+++ b/examples/MergeIsCandidateRector.php
@@ -158,7 +158,7 @@ final class MergeIsCandidateRector extends AbstractRector
                 continue;
             }
 
-            if ((string) $stmt->name === $name) {
+            if ($this->isName($stmt->name, $name)) {
                 return [$i, $stmt];
             }
         }
@@ -253,7 +253,7 @@ final class MergeIsCandidateRector extends AbstractRector
     private function renameNodeToParamNode(ClassMethod $classMethod, string $nodeName): void
     {
         $this->callbackNodeTraverser->traverseNodesWithCallable([$classMethod], function (Node $node) use ($nodeName): ?Node {
-            if (! $node instanceof Variable || $node->name !== 'node') {
+            if (! $node instanceof Variable || ! $this->isName($node, 'node')) {
                 return null;
             }
 
@@ -286,7 +286,7 @@ final class MergeIsCandidateRector extends AbstractRector
     private function removeReturnTrue(ClassMethod $classMethod): void
     {
         $this->callbackNodeTraverser->traverseNodesWithCallable([$classMethod], function (Node $node): ?Node {
-            if (! $node instanceof Return_ || ! $node->expr instanceof ConstFetch || (string) $node->expr->name !== 'true') {
+            if (! $node instanceof Return_ || ! $node->expr instanceof ConstFetch || ! $this->isTrue($node->expr)) {
                 return null;
             }
 
diff --git a/packages/CodeQuality/src/Rector/Foreach_/ForeachToInArrayRector.php b/packages/CodeQuality/src/Rector/Foreach_/ForeachToInArrayRector.php
index 5c345068d65..a0d8dcac07a 100644
--- a/packages/CodeQuality/src/Rector/Foreach_/ForeachToInArrayRector.php
+++ b/packages/CodeQuality/src/Rector/Foreach_/ForeachToInArrayRector.php
@@ -146,12 +146,12 @@ CODE_SAMPLE
         /** @var Variable $foreachVariable */
         $foreachVariable = $foreachNode->valueVar;
         if ($leftValue instanceof Variable) {
-            if ($leftValue->name === $foreachVariable->name) {
+            if ($this->areNodesEqual($leftValue, $foreachVariable)) {
                 return $rightValue;
             }
         }
 
-        if ($rightValue->name === $foreachVariable->name) {
+        if ($this->areNodesEqual($rightValue, $foreachVariable)) {
             return $leftValue;
         }
     }
diff --git a/packages/PHPUnit/src/Rector/TryCatchToExpectExceptionRector.php b/packages/PHPUnit/src/Rector/TryCatchToExpectExceptionRector.php
index e82abbc8d8e..190d46f0730 100644
--- a/packages/PHPUnit/src/Rector/TryCatchToExpectExceptionRector.php
+++ b/packages/PHPUnit/src/Rector/TryCatchToExpectExceptionRector.php
@@ -144,7 +144,7 @@ CODE_SAMPLE
         $argumentVariableName = $this->getName($methodCallNode->args[1]->value);
 
         // is na exception variable
-        if ($exceptionVariableNode->name !== $argumentVariableName) {
+        if (! $this->isName($exceptionVariableNode, $argumentVariableName)) {
             return;
         }
 
diff --git a/packages/Php/src/Rector/FuncCall/CallUserMethodRector.php b/packages/Php/src/Rector/FuncCall/CallUserMethodRector.php
index b923ce822bd..3c17a2c8983 100644
--- a/packages/Php/src/Rector/FuncCall/CallUserMethodRector.php
+++ b/packages/Php/src/Rector/FuncCall/CallUserMethodRector.php
@@ -55,11 +55,11 @@ final class CallUserMethodRector extends AbstractRector
      */
     public function refactor(Node $node): ?Node
     {
-        $newName = $this->matchNewFunctionName($node);
-        if ($newName === null) {
+        if (! $this->isNames($node, array_keys($this->oldToNewFunctions))) {
             return null;
         }
 
+        $newName = $this->oldToNewFunctions[$this->getName($node)];
         $node->name = new Name($newName);
 
         $argNodes = $node->args;
@@ -72,10 +72,4 @@ final class CallUserMethodRector extends AbstractRector
 
         return $node;
     }
-
-    private function matchNewFunctionName(FuncCall $funcCallNode): ?string
-    {
-        $currentFunction = $this->getName($funcCallNode);
-        return $this->oldToNewFunctions[$currentFunction] ?? null;
-    }
 }
diff --git a/src/Rector/Constant/RenameClassConstantsUseToStringsRector.php b/src/Rector/Constant/RenameClassConstantsUseToStringsRector.php
index 68b11cdbf2e..71b61902187 100644
--- a/src/Rector/Constant/RenameClassConstantsUseToStringsRector.php
+++ b/src/Rector/Constant/RenameClassConstantsUseToStringsRector.php
@@ -4,10 +4,7 @@ namespace Rector\Rector\Constant;
 
 use PhpParser\Node;
 use PhpParser\Node\Expr\ClassConstFetch;
-use PhpParser\Node\Expr\Variable;
-use PhpParser\Node\Name\FullyQualified;
 use PhpParser\Node\Scalar\String_;
-use Rector\NodeTypeResolver\Node\Attribute;
 use Rector\Rector\AbstractRector;
 use Rector\RectorDefinition\ConfiguredCodeSample;
 use Rector\RectorDefinition\RectorDefinition;
@@ -56,34 +53,20 @@ final class RenameClassConstantsUseToStringsRector extends AbstractRector
      */
     public function refactor(Node $node): ?Node
     {
-        $className = $this->getClassNameFromClassConstFetch($node);
-
         foreach ($this->oldConstantsToNewValuesByType as $type => $oldConstantsToNewValues) {
-            if ($className !== $type) {
+            if (! $this->isType($node->class, $type)) {
                 continue;
             }
 
             foreach ($oldConstantsToNewValues as $oldConstant => $newValue) {
-                if ($this->isName($node, $oldConstant)) {
-                    return new String_($newValue);
+                if (! $this->isName($node, $oldConstant)) {
+                    continue;
                 }
+
+                return new String_($newValue);
             }
         }
 
         return $node;
     }
-
-    private function getClassNameFromClassConstFetch(ClassConstFetch $classConstFetchNode): ?string
-    {
-        /** @var FullyQualified|null $fqnName */
-        $fqnName = $classConstFetchNode->class->getAttribute(Attribute::RESOLVED_NAME);
-
-        if ($fqnName === null && $classConstFetchNode->class instanceof Variable) {
-            return $this->getName($classConstFetchNode->class);
-        }
-
-        if ($fqnName !== null) {
-            return $fqnName->toString();
-        }
-    }
 }
diff --git a/src/Rector/Namespace_/NamespaceReplacerRector.php b/src/Rector/Namespace_/NamespaceReplacerRector.php
index 3af6197ceb1..8b1c70b8e9b 100644
--- a/src/Rector/Namespace_/NamespaceReplacerRector.php
+++ b/src/Rector/Namespace_/NamespaceReplacerRector.php
@@ -166,9 +166,8 @@ final class NamespaceReplacerRector extends AbstractRector
             return false;
         }
 
-        $nodeName = $nameNode->toString();
         if ($resolvedName instanceof FullyQualified) {
-            return $nodeName !== $resolvedName->toString();
+            return ! $this->isName($nameNode, $resolvedName->toString());
         }
 
         return false;