diff --git a/src/Parser/CachedParser.php b/src/Parser/CachedParser.php
index 400c21bf5a..34957ae430 100644
--- a/src/Parser/CachedParser.php
+++ b/src/Parser/CachedParser.php
@@ -3,19 +3,15 @@
 namespace PHPStan\Parser;
 
 use PhpParser\Node;
-use PHPStan\File\FileReader;
 use function array_slice;
 
 final class CachedParser implements Parser
 {
 
 	/** @var array<string, Node\Stmt[]>*/
-	private array $cachedNodesByString = [];
+	private array $cachedNodesByFile = [];
 
-	private int $cachedNodesByStringCount = 0;
-
-	/** @var array<string, true> */
-	private array $parsedByString = [];
+	private int $cachedNodesByFileCount = 0;
 
 	public function __construct(
 		private Parser $originalParser,
@@ -30,24 +26,22 @@ public function __construct(
 	 */
 	public function parseFile(string $file): array
 	{
-		if ($this->cachedNodesByStringCountMax !== 0 && $this->cachedNodesByStringCount >= $this->cachedNodesByStringCountMax) {
-			$this->cachedNodesByString = array_slice(
-				$this->cachedNodesByString,
+		if ($this->cachedNodesByFileCount !== 0 && $this->cachedNodesByFileCount >= $this->cachedNodesByStringCountMax) {
+			$this->cachedNodesByFile = array_slice(
+				$this->cachedNodesByFile,
 				1,
 				preserve_keys: true,
 			);
 
-			--$this->cachedNodesByStringCount;
+			--$this->cachedNodesByFileCount;
 		}
 
-		$sourceCode = FileReader::read($file);
-		if (!isset($this->cachedNodesByString[$sourceCode]) || isset($this->parsedByString[$sourceCode])) {
-			$this->cachedNodesByString[$sourceCode] = $this->originalParser->parseFile($file);
-			$this->cachedNodesByStringCount++;
-			unset($this->parsedByString[$sourceCode]);
+		if (!isset($this->cachedNodesByFile[$file])) {
+			$this->cachedNodesByFile[$file] = $this->originalParser->parseFile($file);
+			$this->cachedNodesByFileCount++;
 		}
 
-		return $this->cachedNodesByString[$sourceCode];
+		return $this->cachedNodesByFile[$file];
 	}
 
 	/**
@@ -55,28 +49,7 @@ public function parseFile(string $file): array
 	 */
 	public function parseString(string $sourceCode): array
 	{
-		if ($this->cachedNodesByStringCountMax !== 0 && $this->cachedNodesByStringCount >= $this->cachedNodesByStringCountMax) {
-			$this->cachedNodesByString = array_slice(
-				$this->cachedNodesByString,
-				1,
-				preserve_keys: true,
-			);
-
-			--$this->cachedNodesByStringCount;
-		}
-
-		if (!isset($this->cachedNodesByString[$sourceCode])) {
-			$this->cachedNodesByString[$sourceCode] = $this->originalParser->parseString($sourceCode);
-			$this->cachedNodesByStringCount++;
-			$this->parsedByString[$sourceCode] = true;
-		}
-
-		return $this->cachedNodesByString[$sourceCode];
-	}
-
-	public function getCachedNodesByStringCount(): int
-	{
-		return $this->cachedNodesByStringCount;
+		return $this->originalParser->parseString($sourceCode);
 	}
 
 	public function getCachedNodesByStringCountMax(): int
@@ -84,12 +57,4 @@ public function getCachedNodesByStringCountMax(): int
 		return $this->cachedNodesByStringCountMax;
 	}
 
-	/**
-	 * @return array<string, Node[]>
-	 */
-	public function getCachedNodesByString(): array
-	{
-		return $this->cachedNodesByString;
-	}
-
 }
diff --git a/tests/PHPStan/Parser/CachedParserTest.php b/tests/PHPStan/Parser/CachedParserTest.php
index 29ca21ee3a..9bcbc98c0c 100644
--- a/tests/PHPStan/Parser/CachedParserTest.php
+++ b/tests/PHPStan/Parser/CachedParserTest.php
@@ -29,21 +29,6 @@ public function testParseFileClearCache(
 			$cachedNodesByStringCountMax,
 			$parser->getCachedNodesByStringCountMax(),
 		);
-
-		// Add strings to cache
-		for ($i = 0; $i <= $cachedNodesByStringCountMax; $i++) {
-			$parser->parseString('string' . $i);
-		}
-
-		$this->assertSame(
-			$cachedNodesByStringCountExpected,
-			$parser->getCachedNodesByStringCount(),
-		);
-
-		$this->assertCount(
-			$cachedNodesByStringCountExpected,
-			$parser->getCachedNodesByString(),
-		);
 	}
 
 	/**