diff --git a/src/Dependency/DependencyResolver.php b/src/Dependency/DependencyResolver.php
index 5507705a72..04612b1305 100644
--- a/src/Dependency/DependencyResolver.php
+++ b/src/Dependency/DependencyResolver.php
@@ -11,10 +11,11 @@
 use PHPStan\File\FileHelper;
 use PHPStan\Node\InClassMethodNode;
 use PHPStan\Node\InFunctionNode;
+use PHPStan\Reflection\ClassReflection;
+use PHPStan\Reflection\FunctionReflection;
 use PHPStan\Reflection\ParametersAcceptorSelector;
 use PHPStan\Reflection\ParametersAcceptorWithPhpDocs;
 use PHPStan\Reflection\ReflectionProvider;
-use PHPStan\Reflection\ReflectionWithFilename;
 use PHPStan\Type\ClosureType;
 use PHPStan\Type\Constant\ConstantStringType;
 use PHPStan\Type\Type;
@@ -208,7 +209,7 @@ private function considerArrayForCallableTest(Scope $scope, Array_ $arrayNode):
 
 	/**
 	 * @param string $className
-	 * @param array<int, ReflectionWithFilename> $dependenciesReflections
+	 * @param array<int, ClassReflection|FunctionReflection> $dependenciesReflections
 	 */
 	private function addClassToDependencies(string $className, array &$dependenciesReflections): void
 	{
@@ -233,19 +234,14 @@ private function addClassToDependencies(string $className, array &$dependenciesR
 		} while ($classReflection !== null);
 	}
 
-	private function getFunctionReflection(\PhpParser\Node\Name $nameNode, ?Scope $scope): ReflectionWithFilename
+	private function getFunctionReflection(\PhpParser\Node\Name $nameNode, ?Scope $scope): FunctionReflection
 	{
-		$reflection = $this->reflectionProvider->getFunction($nameNode, $scope);
-		if (!$reflection instanceof ReflectionWithFilename) {
-			throw new \PHPStan\Broker\FunctionNotFoundException((string) $nameNode);
-		}
-
-		return $reflection;
+		return $this->reflectionProvider->getFunction($nameNode, $scope);
 	}
 
 	/**
 	 * @param ParametersAcceptorWithPhpDocs $parametersAcceptor
-	 * @param ReflectionWithFilename[] $dependenciesReflections
+	 * @param array<ClassReflection|FunctionReflection> $dependenciesReflections
 	 */
 	private function extractFromParametersAcceptor(
 		ParametersAcceptorWithPhpDocs $parametersAcceptor,
@@ -274,7 +270,7 @@ private function extractFromParametersAcceptor(
 
 	/**
 	 * @param Type|null $throwType
-	 * @param ReflectionWithFilename[] $dependenciesReflections
+	 * @param array<ClassReflection|FunctionReflection> $dependenciesReflections
 	 */
 	private function extractThrowType(
 		?Type $throwType,
diff --git a/src/Dependency/NodeDependencies.php b/src/Dependency/NodeDependencies.php
index b6fcb0ce51..cbc108bea8 100644
--- a/src/Dependency/NodeDependencies.php
+++ b/src/Dependency/NodeDependencies.php
@@ -3,21 +3,22 @@
 namespace PHPStan\Dependency;
 
 use PHPStan\File\FileHelper;
-use PHPStan\Reflection\ReflectionWithFilename;
+use PHPStan\Reflection\ClassReflection;
+use PHPStan\Reflection\FunctionReflection;
 
 class NodeDependencies
 {
 
 	private FileHelper $fileHelper;
 
-	/** @var array<int, ReflectionWithFilename> */
+	/** @var array<int, ClassReflection|FunctionReflection> */
 	private array $reflections;
 
 	private ?ExportedNode $exportedNode;
 
 	/**
 	 * @param FileHelper $fileHelper
-	 * @param array<int, ReflectionWithFilename> $reflections
+	 * @param array<int, ClassReflection|FunctionReflection> $reflections
 	 */
 	public function __construct(
 		FileHelper $fileHelper,
diff --git a/src/Reflection/ClassReflection.php b/src/Reflection/ClassReflection.php
index 2d6a4e3576..fc4a1bc6f6 100644
--- a/src/Reflection/ClassReflection.php
+++ b/src/Reflection/ClassReflection.php
@@ -31,7 +31,7 @@
 use ReflectionMethod;
 
 /** @api */
-class ClassReflection implements ReflectionWithFilename
+class ClassReflection
 {
 
 	private \PHPStan\Reflection\ReflectionProvider $reflectionProvider;
diff --git a/src/Reflection/Php/PhpFunctionReflection.php b/src/Reflection/Php/PhpFunctionReflection.php
index 5690fc2b54..0850ca922a 100644
--- a/src/Reflection/Php/PhpFunctionReflection.php
+++ b/src/Reflection/Php/PhpFunctionReflection.php
@@ -13,7 +13,6 @@
 use PHPStan\Reflection\FunctionVariantWithPhpDocs;
 use PHPStan\Reflection\ParametersAcceptor;
 use PHPStan\Reflection\ParametersAcceptorWithPhpDocs;
-use PHPStan\Reflection\ReflectionWithFilename;
 use PHPStan\TrinaryLogic;
 use PHPStan\Type\Generic\TemplateTypeMap;
 use PHPStan\Type\MixedType;
@@ -21,7 +20,7 @@
 use PHPStan\Type\TypehintHelper;
 use PHPStan\Type\VoidType;
 
-class PhpFunctionReflection implements FunctionReflection, ReflectionWithFilename
+class PhpFunctionReflection implements FunctionReflection
 {
 
 	private \ReflectionFunction $reflection;
diff --git a/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php b/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php
index 5363194fa8..ce896640a0 100644
--- a/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php
+++ b/src/Reflection/ReflectionProvider/ClassBlacklistReflectionProvider.php
@@ -9,7 +9,6 @@
 use PHPStan\Reflection\FunctionReflection;
 use PHPStan\Reflection\GlobalConstantReflection;
 use PHPStan\Reflection\ReflectionProvider;
-use PHPStan\Reflection\ReflectionWithFilename;
 
 class ClassBlacklistReflectionProvider implements ReflectionProvider
 {
@@ -138,9 +137,6 @@ public function hasFunction(\PhpParser\Node\Name $nameNode, ?Scope $scope): bool
 		}
 
 		$functionReflection = $this->reflectionProvider->getFunction($nameNode, $scope);
-		if (!$functionReflection instanceof ReflectionWithFilename) {
-			return true;
-		}
 
 		return $functionReflection->getFileName() !== $this->singleReflectionInsteadOfFile;
 	}
diff --git a/src/Reflection/ReflectionWithFilename.php b/src/Reflection/ReflectionWithFilename.php
deleted file mode 100644
index c626dbb7cf..0000000000
--- a/src/Reflection/ReflectionWithFilename.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php declare(strict_types = 1);
-
-namespace PHPStan\Reflection;
-
-/** @api */
-interface ReflectionWithFilename
-{
-
-	public function getFileName(): ?string;
-
-}