diff --git a/src/Fixer/LanguageConstruct/GetClassToClassKeywordFixer.php b/src/Fixer/LanguageConstruct/GetClassToClassKeywordFixer.php
index 51c3144d8e1..638b1ffb3ee 100644
--- a/src/Fixer/LanguageConstruct/GetClassToClassKeywordFixer.php
+++ b/src/Fixer/LanguageConstruct/GetClassToClassKeywordFixer.php
@@ -83,12 +83,14 @@ public function isRisky(): bool
      */
     protected function applyFix(\SplFileInfo $file, Tokens $tokens): void
     {
+        $functionsAnalyzer = new FunctionsAnalyzer();
+
         for ($index = $tokens->count() - 1; $index > 0; --$index) {
             if (!$tokens[$index]->equals([T_STRING, 'get_class'], false)) {
                 continue;
             }
 
-            if (!(new FunctionsAnalyzer())->isGlobalFunctionCall($tokens, $index)) {
+            if (!$functionsAnalyzer->isGlobalFunctionCall($tokens, $index)) {
                 continue;
             }
 
@@ -152,6 +154,6 @@ private function fixGetClassCall(Tokens $tokens, int $index, int $braceOpenIndex
         }
 
         $tokens->clearAt($index);
-        $tokens->insertSlices([$index => $replacements]);
+        $tokens->insertAt($index, $replacements);
     }
 }