diff --git a/src/Type/Php/PdoStatementFetchAllReturnTypeExtension.php b/src/Type/Php/PdoStatementFetchAllReturnTypeExtension.php
deleted file mode 100644
index 722343d0e3..0000000000
--- a/src/Type/Php/PdoStatementFetchAllReturnTypeExtension.php
+++ /dev/null
@@ -1,80 +0,0 @@
-<?php declare(strict_types = 1);
-
-namespace PHPStan\Type\Php;
-
-use PDO;
-use PhpParser\Node\Expr\MethodCall;
-use PHPStan\Analyser\Scope;
-use PHPStan\DependencyInjection\AutowiredService;
-use PHPStan\Reflection\MethodReflection;
-use PHPStan\Reflection\ParametersAcceptorSelector;
-use PHPStan\Type\Accessory\AccessoryArrayListType;
-use PHPStan\Type\ArrayType;
-use PHPStan\Type\Constant\ConstantBooleanType;
-use PHPStan\Type\DynamicMethodReturnTypeExtension;
-use PHPStan\Type\IntegerType;
-use PHPStan\Type\MixedType;
-use PHPStan\Type\Type;
-use PHPStan\Type\TypeCombinator;
-use PHPStan\Type\TypeUtils;
-use function count;
-
-#[AutowiredService]
-final class PdoStatementFetchAllReturnTypeExtension implements DynamicMethodReturnTypeExtension
-{
-
-	public function getClass(): string
-	{
-		return 'PDOStatement';
-	}
-
-	public function isMethodSupported(MethodReflection $methodReflection): bool
-	{
-		return $methodReflection->getName() === 'fetchAll';
-	}
-
-	public function getTypeFromMethodCall(
-		MethodReflection $methodReflection,
-		MethodCall $methodCall,
-		Scope $scope,
-	): ?Type
-	{
-		$args = $methodCall->getArgs();
-		if (count($args) < 1) {
-			return null;
-		}
-
-		$modeType = $scope->getType($args[0]->value);
-		$constantIntegers = TypeUtils::getConstantIntegers($modeType);
-
-		if (count($constantIntegers) === 0) {
-			return null;
-		}
-
-		foreach ($constantIntegers as $constantInteger) {
-			$mode = $constantInteger->getValue();
-			if (
-				($mode & 0xFFFF) === PDO::FETCH_KEY_PAIR
-				|| ($mode & PDO::FETCH_GROUP) !== 0
-				|| ($mode & PDO::FETCH_UNIQUE) !== 0
-			) {
-				return null;
-			}
-		}
-
-		$variant = ParametersAcceptorSelector::selectFromArgs($scope, $args, $methodReflection->getVariants());
-		$returnType = $variant->getReturnType();
-
-		$listType = TypeCombinator::intersect(
-			new ArrayType(new IntegerType(), new MixedType()),
-			new AccessoryArrayListType(),
-		);
-
-		if (!$returnType->isFalse()->no()) {
-			return TypeCombinator::union($listType, new ConstantBooleanType(false));
-		}
-
-		return $listType;
-	}
-
-}
diff --git a/tests/PHPStan/Analyser/nsrt/bug-11889-php7.php b/tests/PHPStan/Analyser/nsrt/bug-11889-php7.php
deleted file mode 100644
index 528b8af0f9..0000000000
--- a/tests/PHPStan/Analyser/nsrt/bug-11889-php7.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php // lint < 8.0
-
-declare(strict_types = 1);
-
-namespace Bug11889Php7;
-
-use PDO;
-use PDOStatement;
-use function PHPStan\Testing\assertType;
-
-function test(PDOStatement $stmt): void
-{
-	assertType('list|false', $stmt->fetchAll(PDO::FETCH_ASSOC));
-	assertType('list|false', $stmt->fetchAll(PDO::FETCH_COLUMN));
-
-	// Non-list modes
-	assertType('array|false', $stmt->fetchAll(PDO::FETCH_KEY_PAIR));
-}
diff --git a/tests/PHPStan/Analyser/nsrt/bug-11889.php b/tests/PHPStan/Analyser/nsrt/bug-11889.php
deleted file mode 100644
index 27343e0cac..0000000000
--- a/tests/PHPStan/Analyser/nsrt/bug-11889.php
+++ /dev/null
@@ -1,49 +0,0 @@
-<?php // lint >= 8.0
-
-declare(strict_types = 1);
-
-namespace Bug11889;
-
-use PDO;
-use PDOStatement;
-use function PHPStan\Testing\assertType;
-
-function test(PDOStatement $stmt): void
-{
-	// No mode argument - unknown default, stays as array
-	assertType('array', $stmt->fetchAll());
-
-	// Single-argument modes that return lists
-	assertType('list', $stmt->fetchAll(PDO::FETCH_ASSOC));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_NUM));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_BOTH));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_OBJ));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_COLUMN));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_CLASS));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_NAMED));
-
-	// Modes that return non-list arrays
-	assertType('array', $stmt->fetchAll(PDO::FETCH_KEY_PAIR));
-	assertType('array', $stmt->fetchAll(PDO::FETCH_GROUP | PDO::FETCH_ASSOC));
-	assertType('array', $stmt->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_ASSOC));
-
-	// Multi-argument overload variants always return lists
-	assertType('list', $stmt->fetchAll(PDO::FETCH_COLUMN, 0));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_CLASS, \stdClass::class));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_CLASS, \stdClass::class, []));
-	assertType('list', $stmt->fetchAll(PDO::FETCH_FUNC, function () {
-		return 'test';
-	}));
-}
-
-/**
- * @return list<string>
- */
-function get_cv_files(): array
-{
-	$pdo = new PDO("");
-	$stmt = $pdo->prepare('SELECT `file` FROM `commonvoice`');
-	$stmt->execute();
-
-	return $stmt->fetchAll(PDO::FETCH_COLUMN);
-}