diff --git a/tests/Utils/FileSystem.normalizePath.phpt b/tests/Utils/FileSystem.normalizePath.phpt
index 00432fdf5..4cbcddd05 100644
--- a/tests/Utils/FileSystem.normalizePath.phpt
+++ b/tests/Utils/FileSystem.normalizePath.phpt
@@ -36,6 +36,10 @@ test('', function () {
 	Assert::same("..{$S}", FileSystem::normalizePath('file/../../'));
 	Assert::same("{$S}..{$S}bar", FileSystem::normalizePath('/file/../../bar'));
 	Assert::same("..{$S}bar", FileSystem::normalizePath('file/../../bar'));
+	Assert::same("..{$S}file", FileSystem::normalizePath('../file'));
+	Assert::same("{$S}..{$S}file", FileSystem::normalizePath('/../file'));
+	Assert::same('file', FileSystem::normalizePath('./file'));
+	Assert::same("{$S}file", FileSystem::normalizePath('/./file'));
 
 	Assert::same("{$S}..{$S}bar", FileSystem::normalizePath('/file/./.././.././bar'));
 	Assert::same("..{$S}bar", FileSystem::normalizePath('file/../../bar/.'));
diff --git a/tests/Utils/SmartObject.undeclaredMethod.native.phpt b/tests/Utils/SmartObject.undeclaredMethod.native.phpt
new file mode 100644
index 000000000..b62ea0e01
--- /dev/null
+++ b/tests/Utils/SmartObject.undeclaredMethod.native.phpt
@@ -0,0 +1,163 @@
+<?php
+
+/**
+ * Test: PHP native error messages for undeclared method.
+ */
+
+declare(strict_types=1);
+
+use Tester\Assert;
+
+require __DIR__ . '/../bootstrap.php';
+
+
+class ParentClass
+{
+	public function callPrivate()
+	{
+		$this->privateMethod();
+	}
+
+
+	public function callPrivateStatic()
+	{
+		static::privateStaticMethod();
+	}
+
+
+	private function callPrivateParent()
+	{
+	}
+}
+
+
+class InterClass extends ParentClass
+{
+	public function callParents()
+	{
+		parent::callParents();
+	}
+}
+
+
+class ChildClass extends InterClass
+{
+	public function callParents()
+	{
+		parent::callParents();
+	}
+
+
+	public function callMissingParent()
+	{
+		parent::callMissingParent();
+	}
+
+
+	public static function callMissingParentStatic()
+	{
+		parent::callMissingParentStatic();
+	}
+
+
+	public function callPrivateParent()
+	{
+		parent::callPrivateParent();
+	}
+
+
+	protected function protectedMethod()
+	{
+	}
+
+
+	protected static function protectedStaticMethod()
+	{
+	}
+
+
+	private function privateMethod()
+	{
+	}
+
+
+	private static function privateStaticMethod()
+	{
+	}
+}
+
+
+
+$obj = new ParentClass;
+Assert::exception(
+	fn() => $obj->undef(),
+	Error::class,
+	'Call to undefined method ParentClass::undef()',
+);
+
+$obj = new ChildClass;
+Assert::exception(
+	fn() => $obj->undef(),
+	Error::class,
+	'Call to undefined method ChildClass::undef()',
+);
+
+Assert::exception(
+	fn() => $obj->callParents(),
+	Error::class,
+	'Call to undefined method ParentClass::callParents()',
+);
+
+Assert::exception(
+	fn() => $obj->callMissingParent(),
+	Error::class,
+	'Call to undefined method InterClass::callMissingParent()',
+);
+
+Assert::exception(
+	fn() => $obj->callMissingParentStatic(),
+	Error::class,
+	'Call to undefined method InterClass::callMissingParentStatic()',
+);
+
+Assert::exception(
+	fn() => $obj::callMissingParentStatic(),
+	Error::class,
+	'Call to undefined method InterClass::callMissingParentStatic()',
+);
+
+Assert::exception(
+	fn() => $obj->callPrivateParent(),
+	Error::class,
+	'Call to private method ParentClass::callPrivateParent() from scope ChildClass',
+);
+
+Assert::exception(
+	fn() => $obj->protectedMethod(),
+	Error::class,
+	'Call to protected method ChildClass::protectedMethod() from global scope',
+);
+
+Assert::exception(
+	fn() => $obj->protectedStaticMethod(),
+	Error::class,
+	'Call to protected method ChildClass::protectedStaticMethod() from global scope',
+);
+
+Assert::exception(
+	fn() => $obj::protectedStaticMethod(),
+	Error::class,
+	'Call to protected method ChildClass::protectedStaticMethod() from global scope',
+);
+
+Assert::exception(
+	fn() => $obj->callPrivate(),
+	Error::class,
+	'Call to private method ChildClass::privateMethod() from scope ParentClass',
+);
+
+Assert::exception(
+	fn() => $obj->callPrivateStatic(),
+	Error::class,
+	'Call to private method ChildClass::privateStaticMethod() from scope ParentClass',
+);