diff --git a/composer.json b/composer.json
index 2d8bb97..1232b6e 100644
--- a/composer.json
+++ b/composer.json
@@ -38,7 +38,7 @@
     "hashids/hashids": "^3.0|^4.0",
     "jenssegers/optimus": "^1.0",
     "orchestra/testbench": "^5.0",
-    "phpunit/phpunit": "^8.0|^9.0",
+    "phpunit/phpunit": "^8.5|^9.0",
     "squizlabs/php_codesniffer": "^3.5"
   },
   "suggest": {
diff --git a/tests/Integration/ServiceProviderTest.php b/tests/Integration/ServiceProviderTest.php
index ef746fd..6de8311 100644
--- a/tests/Integration/ServiceProviderTest.php
+++ b/tests/Integration/ServiceProviderTest.php
@@ -32,7 +32,7 @@ public function testItShouldPublishVendorConfig()
         $sourceFile = \dirname(\dirname(__DIR__)) . '/config/fakeid.php';
         $targetFile = \base_path('config/fakeid.php');
 
-        $this->assertFileDoesNotExist($targetFile);
+        $this->assertFileNotExists($targetFile);
 
         $this->artisan('vendor:publish', [
             '--provider' => 'Laravel\\FakeId\\ServiceProvider',