diff --git a/src/Type/Php/ReflectionGetAttributesMethodReturnTypeExtension.php b/src/Type/Php/ReflectionGetAttributesMethodReturnTypeExtension.php
index 1077c912c40..d5a21b7f624 100644
--- a/src/Type/Php/ReflectionGetAttributesMethodReturnTypeExtension.php
+++ b/src/Type/Php/ReflectionGetAttributesMethodReturnTypeExtension.php
@@ -32,8 +32,7 @@ public function getClass(): string
 
 	public function isMethodSupported(MethodReflection $methodReflection): bool
 	{
-		return $methodReflection->getDeclaringClass()->getName() === $this->className
-			&& $methodReflection->getName() === 'getAttributes';
+		return $methodReflection->getName() === 'getAttributes';
 	}
 
 	public function getTypeFromMethodCall(MethodReflection $methodReflection, MethodCall $methodCall, Scope $scope): ?Type
diff --git a/tests/PHPStan/Analyser/nsrt/reflection-attribute-getattributes-union.php b/tests/PHPStan/Analyser/nsrt/reflection-attribute-getattributes-union.php
new file mode 100644
index 00000000000..ae4b17ea823
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/reflection-attribute-getattributes-union.php
@@ -0,0 +1,54 @@
+<?php // lint >= 8.0
+
+declare(strict_types=1);
+
+namespace ReflectionAttributeGetAttributesUnion;
+
+use ReflectionAttribute;
+use ReflectionClass;
+use ReflectionProperty;
+use function PHPStan\Testing\assertType;
+
+#[\Attribute]
+class MyAttr {}
+
+// Single type — worked before
+function testSingle(ReflectionClass $ref): void
+{
+	/** @var class-string<MyAttr> $class */
+	$class = MyAttr::class;
+	$attrs = $ref->getAttributes($class, ReflectionAttribute::IS_INSTANCEOF);
+	assertType('list<ReflectionAttribute<ReflectionAttributeGetAttributesUnion\MyAttr>>', $attrs);
+	assertType('ReflectionAttributeGetAttributesUnion\MyAttr', $attrs[0]->newInstance());
+}
+
+// Union type — dynamic extension should fire for all members
+function testUnion(ReflectionClass|ReflectionProperty $ref): void
+{
+	/** @var class-string<MyAttr> $class */
+	$class = MyAttr::class;
+	$attrs = $ref->getAttributes($class, ReflectionAttribute::IS_INSTANCEOF);
+	assertType('list<ReflectionAttribute<ReflectionAttributeGetAttributesUnion\MyAttr>>', $attrs);
+	assertType('ReflectionAttributeGetAttributesUnion\MyAttr', $attrs[0]->newInstance());
+}
+
+// Template T flows through union
+/**
+ * @template T of object
+ * @param ReflectionClass<object>|ReflectionProperty $reflection
+ * @param class-string<T> $attributeClassName
+ * @return T
+ */
+function getSingleAttribute(
+	ReflectionClass|ReflectionProperty $reflection,
+	string $attributeClassName,
+): object
+{
+	$attributes = $reflection->getAttributes($attributeClassName, ReflectionAttribute::IS_INSTANCEOF);
+	assertType('list<ReflectionAttribute<T of object (function ReflectionAttributeGetAttributesUnion\getSingleAttribute(), argument)>>', $attributes);
+
+	$instance = $attributes[0]->newInstance();
+	assertType('T of object (function ReflectionAttributeGetAttributesUnion\getSingleAttribute(), argument)', $instance);
+
+	return $instance;
+}