diff --git a/src/FileMap.php b/src/FileMap.php
index c079f55..ae72a38 100644
--- a/src/FileMap.php
+++ b/src/FileMap.php
@@ -21,6 +21,16 @@ final class FileMap
     /** @var array<int, T> */
     private array $pendingFiles = [];
 
+    /**
+     * @param array<int, S> $files
+     * @param array<int, T> $splFiles
+     */
+    public function __construct(array $files = [], array $splFiles = [])
+    {
+        $this->map = $files;
+        $this->pendingFiles = $splFiles;
+    }
+
     /**
      * @return T|null
      */
@@ -46,14 +56,6 @@ public function put(File $file, SplFileInfo $fileInfo): void
         $this->pendingFiles[$id] = $file;
     }
 
-    /**
-     * @param T $file
-     */
-    private function getObjectId(File $file): int
-    {
-        return spl_object_id($file);
-    }
-
     /**
      * @param T $file
      * @return S
@@ -84,4 +86,12 @@ public function remove(File $file): void
         unset($this->map[$id]);
         unset($this->pendingFiles[$id]);
     }
+
+    /**
+     * @param T $file
+     */
+    private function getObjectId(File $file): int
+    {
+        return spl_object_id($file);
+    }
 }
diff --git a/src/Manager.php b/src/Manager.php
index a19f473..031dcdc 100644
--- a/src/Manager.php
+++ b/src/Manager.php
@@ -324,9 +324,7 @@ public function getClass(): string
 
     public function clear(): void
     {
-        /** @var FileMap<T, \SplFileInfo> $map */
-        $map = new FileMap();
-        $this->fileMap = $map;
+        $this->fileMap = new FileMap();
     }
 
     private function hashFile(SplFileInfo $file): string