diff --git a/config/config.php b/config/config.php
index 980e986d0ff..4874a8d586f 100644
--- a/config/config.php
+++ b/config/config.php
@@ -64,6 +64,7 @@
 
     $rectorConfig->disableImportNames();
     $rectorConfig->importShortClasses();
+    $rectorConfig->indent(' ', 4);
 
     $rectorConfig->fileExtensions(['php']);
     $rectorConfig->nestedChainMethodCallLimit(60);
diff --git a/packages/BetterPhpDocParser/PhpDocParser/ClassAnnotationMatcher.php b/packages/BetterPhpDocParser/PhpDocParser/ClassAnnotationMatcher.php
index c089445dbad..11cf414b31c 100644
--- a/packages/BetterPhpDocParser/PhpDocParser/ClassAnnotationMatcher.php
+++ b/packages/BetterPhpDocParser/PhpDocParser/ClassAnnotationMatcher.php
@@ -72,7 +72,12 @@ private function _resolveTagFullyQualifiedName(
     /**
      * @param Use_[]|GroupUse[] $uses
      */
-    private function resolveFullyQualifiedClass(array $uses, Node $node, string $tag, bool $returnNullOnUnknownClass): ?string
+    private function resolveFullyQualifiedClass(
+        array $uses,
+        Node $node,
+        string $tag,
+        bool $returnNullOnUnknownClass
+    ): ?string
     {
         $scope = $node->getAttribute(AttributeKey::SCOPE);
 
@@ -127,7 +132,7 @@ private function resolveAsAliased(array $uses, string $tag, bool $returnNullOnUn
 
     private function resolveClass(?string $class, bool $returnNullOnUnknownClass): ?string
     {
-        if (null === $class) {
+        if ($class === null) {
             return null;
         }
         $resolvedClass = $this->reflectionProvider->hasClass($class) ? $class : null;
diff --git a/packages/Config/RectorConfig.php b/packages/Config/RectorConfig.php
index 0c3ee1042fd..0e8b83037e9 100644
--- a/packages/Config/RectorConfig.php
+++ b/packages/Config/RectorConfig.php
@@ -230,4 +230,14 @@ public function cacheClass(string $cacheClass): void
         $parameters = $this->parameters();
         $parameters->set(Option::CACHE_CLASS, $cacheClass);
     }
+
+    /**
+     * @see https://github.com/nikic/PHP-Parser/issues/723#issuecomment-712401963
+     */
+    public function indent(string $character, int $count): void
+    {
+        $parameters = $this->parameters();
+        $parameters->set(Option::INDENT_CHAR, $character);
+        $parameters->set(Option::INDENT_SIZE, $count);
+    }
 }
diff --git a/src/Configuration/Option.php b/src/Configuration/Option.php
index b1b78cb095a..6adf72c11c1 100644
--- a/src/Configuration/Option.php
+++ b/src/Configuration/Option.php
@@ -222,4 +222,16 @@ final class Option
      * @var string
      */
     public const MEMORY_LIMIT = 'memory-limit';
+
+    /**
+     * @deprecated Use @see \Rector\Config\RectorConfig::indent() method
+     * @var string
+     */
+    public const INDENT_CHAR = 'indent-char';
+
+    /**
+     * @deprecated Use @see \Rector\Config\RectorConfig::indent() method
+     * @var string
+     */
+    public const INDENT_SIZE = 'indent-size';
 }
diff --git a/src/Configuration/RectorConfigProvider.php b/src/Configuration/RectorConfigProvider.php
index 19f6efa4dc7..38479ca7086 100644
--- a/src/Configuration/RectorConfigProvider.php
+++ b/src/Configuration/RectorConfigProvider.php
@@ -31,4 +31,14 @@ public function getSymfonyContainerXml(): string
     {
         return $this->parameterProvider->provideStringParameter(Option::SYMFONY_CONTAINER_XML_PATH_PARAMETER);
     }
+
+    public function getIndentChar(): string
+    {
+        return $this->parameterProvider->provideStringParameter(Option::INDENT_CHAR);
+    }
+
+    public function getIndentSize(): int
+    {
+        return $this->parameterProvider->provideIntParameter(Option::INDENT_SIZE);
+    }
 }
diff --git a/src/PhpParser/Printer/BetterStandardPrinter.php b/src/PhpParser/Printer/BetterStandardPrinter.php
index aa6a307cb3f..ab20d29122b 100644
--- a/src/PhpParser/Printer/BetterStandardPrinter.php
+++ b/src/PhpParser/Printer/BetterStandardPrinter.php
@@ -27,9 +27,9 @@
 use PhpParser\Node\Stmt\Use_;
 use PhpParser\PrettyPrinter\Standard;
 use Rector\Comments\NodeDocBlock\DocBlockUpdater;
+use Rector\Core\Configuration\RectorConfigProvider;
 use Rector\Core\Contract\PhpParser\NodePrinterInterface;
 use Rector\Core\PhpParser\Node\CustomNode\FileWithoutNamespace;
-use Rector\Core\PhpParser\Printer\Whitespace\IndentCharacterDetector;
 use Rector\Core\Util\StringUtils;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 
@@ -80,8 +80,8 @@ final class BetterStandardPrinter extends Standard implements NodePrinterInterfa
      * @param mixed[] $options
      */
     public function __construct(
-        private readonly IndentCharacterDetector $indentCharacterDetector,
         private readonly DocBlockUpdater $docBlockUpdater,
+        private readonly RectorConfigProvider $rectorConfigProvider,
         array $options = []
     ) {
         parent::__construct($options);
@@ -103,8 +103,7 @@ public function printFormatPreserving(array $stmts, array $origStmts, array $ori
     {
         $newStmts = $this->resolveNewStmts($stmts);
 
-        // detect per print
-        $this->tabOrSpaceIndentCharacter = $this->indentCharacterDetector->detect($origTokens);
+        $this->tabOrSpaceIndentCharacter = $this->rectorConfigProvider->getIndentChar();
 
         $content = parent::printFormatPreserving($newStmts, $origStmts, $origTokens);
 
diff --git a/src/PhpParser/Printer/Whitespace/IndentCharacterDetector.php b/src/PhpParser/Printer/Whitespace/IndentCharacterDetector.php
deleted file mode 100644
index 3707c63af47..00000000000
--- a/src/PhpParser/Printer/Whitespace/IndentCharacterDetector.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Rector\Core\PhpParser\Printer\Whitespace;
-
-use Nette\Utils\Strings;
-
-final class IndentCharacterDetector
-{
-    /**
-     * Solves https://github.com/rectorphp/rector/issues/1964
-     *
-     * Some files have spaces, some have tabs. Keep the original indent if possible.
-     *
-     * @param mixed[] $tokens
-     */
-    public function detect(array $tokens): string
-    {
-        foreach ($tokens as $token) {
-            if ($token[0] === T_WHITESPACE) {
-                $tokenContent = $token[1];
-
-                $tabMatches = Strings::matchAll($tokenContent, '#^\t#m');
-                if ($tabMatches !== []) {
-                    return "\t";
-                }
-            }
-        }
-
-        // use space by default
-        return ' ';
-    }
-}
diff --git a/tests/Issues/DoNotReplaceUnknownClasses/DoNotReplaceUnknownClassesTest.php b/tests/Issues/DoNotReplaceUnknownClasses/DoNotReplaceUnknownClassesTest.php
index 03fa6f6a0a4..a6aed77f8c3 100644
--- a/tests/Issues/DoNotReplaceUnknownClasses/DoNotReplaceUnknownClassesTest.php
+++ b/tests/Issues/DoNotReplaceUnknownClasses/DoNotReplaceUnknownClassesTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Rector\Core\Tests\Issues\DoNotReplaceUnknownClasses;
 
 use Iterator;