diff --git a/tests/Scoper/PhpScoperTest.php b/tests/Scoper/PhpScoperTest.php
index ee99a441..03de9875 100644
--- a/tests/Scoper/PhpScoperTest.php
+++ b/tests/Scoper/PhpScoperTest.php
@@ -312,8 +312,8 @@ public function test_cannot_scope_an_invalid_PHP_file()
     public function test_creates_a_new_traverser_for_each_file()
     {
         $files = [
-            'file1.php' =>  'file1',
-            'file2.php' =>  'file2',
+            'file1.php' => 'file1',
+            'file2.php' => 'file2',
         ];
 
         $prefix = 'Humbug';
@@ -340,7 +340,7 @@ public function test_creates_a_new_traverser_for_each_file()
                 new Name('file2'),
             ])
         ;
-        
+
         /** @var NodeTraverserInterface|ObjectProphecy $firstTraverserProphecy */
         $firstTraverserProphecy = $this->prophesize(NodeTraverserInterface::class);
         /** @var NodeTraverserInterface $firstTraverser */
@@ -355,7 +355,7 @@ public function test_creates_a_new_traverser_for_each_file()
         $this->traverserFactoryProphecy
             ->create($prefix, $whitelist, Argument::that(
                 function (...$args) use (&$i): bool {
-                    $i++;
+                    ++$i;
 
                     return 1 === $i;
                 }
@@ -365,7 +365,7 @@ function (...$args) use (&$i): bool {
         $this->traverserFactoryProphecy
             ->create($prefix, $whitelist, Argument::that(
                 function (...$args) use (&$i): bool {
-                    $i++;
+                    ++$i;
 
                     return 4 === $i;
                 }
diff --git a/tests/Scoper/TraverserFactoryTest.php b/tests/Scoper/TraverserFactoryTest.php
index fa00ab5e..2085bda6 100644
--- a/tests/Scoper/TraverserFactoryTest.php
+++ b/tests/Scoper/TraverserFactoryTest.php
@@ -16,11 +16,7 @@
 
 use Humbug\PhpScoper\Scoper;
 use PHPUnit\Framework\TestCase;
-use function Humbug\PhpScoper\create_fake_patcher;
 use function Humbug\PhpScoper\create_fake_whitelister;
-use function Humbug\PhpScoper\escape_path;
-use function Humbug\PhpScoper\make_tmp_dir;
-use function Humbug\PhpScoper\remove_dir;
 
 /**
  * @covers \Humbug\PhpScoper\Scoper\TraverserFactory