diff --git a/tests/Core/AbstractMethodTestCase.php b/tests/Core/AbstractMethodTestCase.php
index 4fe74b6fdd..9b4b8dbff6 100644
--- a/tests/Core/AbstractMethodTestCase.php
+++ b/tests/Core/AbstractMethodTestCase.php
@@ -10,8 +10,8 @@
 namespace PHP_CodeSniffer\Tests\Core;
 
 use Exception;
-use PHP_CodeSniffer\Files\DummyFile;
 use PHP_CodeSniffer\Files\File;
+use PHP_CodeSniffer\Files\LocalFile;
 use PHP_CodeSniffer\Ruleset;
 use PHP_CodeSniffer\Tests\ConfigDouble;
 use PHPUnit\Framework\TestCase;
@@ -58,11 +58,7 @@ public static function setUpBeforeClass(): void
         $relativePath   = str_replace('\\', DIRECTORY_SEPARATOR, $relativeCN);
         $pathToTestFile = realpath(__DIR__).$relativePath.'.inc';
 
-        // Make sure the file gets parsed correctly based on the file type.
-        $contents  = 'phpcs_input_file: '.$pathToTestFile.PHP_EOL;
-        $contents .= file_get_contents($pathToTestFile);
-
-        self::$phpcsFile = new DummyFile($contents, $ruleset, $config);
+        self::$phpcsFile = new LocalFile($pathToTestFile, $ruleset, $config);
         self::$phpcsFile->parse();
 
     }//end setUpBeforeClass()
diff --git a/tests/Core/Tokenizers/AbstractTokenizerTestCase.php b/tests/Core/Tokenizers/AbstractTokenizerTestCase.php
index 797a49b84b..cd8ce349f8 100644
--- a/tests/Core/Tokenizers/AbstractTokenizerTestCase.php
+++ b/tests/Core/Tokenizers/AbstractTokenizerTestCase.php
@@ -12,7 +12,7 @@
 
 namespace PHP_CodeSniffer\Tests\Core\Tokenizers;
 
-use PHP_CodeSniffer\Files\DummyFile;
+use PHP_CodeSniffer\Files\LocalFile;
 use PHP_CodeSniffer\Ruleset;
 use PHP_CodeSniffer\Tests\ConfigDouble;
 use PHP_CodeSniffer\Tests\Core\AbstractMethodTestCase;
@@ -63,11 +63,7 @@ protected function setUp(): void
             $relativePath   = str_replace('\\', DIRECTORY_SEPARATOR, $relativeCN);
             $pathToTestFile = realpath(__DIR__).$relativePath.'.inc';
 
-            // Make sure the file gets parsed correctly based on the file type.
-            $contents  = 'phpcs_input_file: '.$pathToTestFile.PHP_EOL;
-            $contents .= file_get_contents($pathToTestFile);
-
-            $this->phpcsFile = new DummyFile($contents, $ruleset, $config);
+            $this->phpcsFile = new LocalFile($pathToTestFile, $ruleset, $config);
             $this->phpcsFile->parse();
         }//end if