diff --git a/installer/Internal/Events/CopyEvent.php b/installer/Internal/Events/CopyEvent.php
index cfe8f04..95a34eb 100644
--- a/installer/Internal/Events/CopyEvent.php
+++ b/installer/Internal/Events/CopyEvent.php
@@ -60,10 +60,12 @@ public function normalizePath(string $root, string $path): string
         $source = \ltrim($path, '/');
 
         if ($sourceRoot === '') {
-            return '/' . $source;
+            return \file_exists($source) ? $source : '/' . $source;
         }
 
-        return '/' . $sourceRoot . '/' . $source;
+        return \file_exists($sourceRoot . '/' . $source)
+            ? $sourceRoot . '/' . $source
+            : '/' . $sourceRoot . '/' . $source;
     }
 
     public function detectType(string $path): string
diff --git a/installer/Tests/InstallationResult.php b/installer/Tests/InstallationResult.php
index 51740ca..4955ccf 100644
--- a/installer/Tests/InstallationResult.php
+++ b/installer/Tests/InstallationResult.php
@@ -337,7 +337,7 @@ public function assertCopied(string $path, string $destination): self
     {
         foreach ($this->events as $event) {
             if ($event instanceof CopyEvent) {
-                if (\str_ends_with($event->getFullSource(), $path)) {
+                if (\str_ends_with(\str_replace('\\', '/', $event->getFullSource()), \str_replace('\\', '/', $path))) {
                     if (\str_ends_with($event->getFullDestination(), $destination)) {
                         Assert::assertTrue(true);
 
diff --git a/installer/Tests/Unit/Internal/Generator/Bootloader/ClassBindingTest.php b/installer/Tests/Unit/Internal/Generator/Bootloader/ClassBindingTest.php
index 29fa801..4af5fb4 100644
--- a/installer/Tests/Unit/Internal/Generator/Bootloader/ClassBindingTest.php
+++ b/installer/Tests/Unit/Internal/Generator/Bootloader/ClassBindingTest.php
@@ -5,6 +5,7 @@
 namespace Tests\Unit\Internal\Generator\Bootloader;
 
 use Installer\Internal\Generator\Bootloader\ClassBinding;
+use Nette\PhpGenerator\Printer;
 use Spiral\Reactor\Partial\PhpNamespace;
 use Tests\TestCase;
 
@@ -22,6 +23,9 @@ public function testRender(): void
             $binding->render($namespace = new PhpNamespace('App'))
         );
 
+        $printer = new Printer();
+        $printer->omitEmptyNamespaces = false;
+
         $this->assertSame(
             <<<PHP
             namespace App;
@@ -30,7 +34,7 @@ public function testRender(): void
 
 
             PHP,
-            (string)$namespace
+            $printer->printNamespace($namespace->getElement())
         );
     }
 }
diff --git a/installer/composer.json b/installer/composer.json
index 949fcf1..d1fec5c 100644
--- a/installer/composer.json
+++ b/installer/composer.json
@@ -3,7 +3,7 @@
     "license": "MIT",
     "description": "Spiral Application installer",
     "require-dev": {
-        "nette/php-generator": "^4.0",
+        "nette/php-generator": "^4.1.2",
         "spiral/framework": "^3.8",
         "spiral/nyholm-bridge": "^1.0",
         "composer/composer": "^2.4",