diff --git a/tests/ArrayArchive.php b/tests/ArrayArchive.php
index 4ff9931..532e09e 100644
--- a/tests/ArrayArchive.php
+++ b/tests/ArrayArchive.php
@@ -19,6 +19,26 @@ public function __construct($filePath, $new = false, $archiveImplementation = nu
     {
     }
 
+    /**
+     * Check if the archive is open.
+     *
+     * @return bool
+     */
+    public function isOpen(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Check if the archive is closed.
+     *
+     * @return bool
+     */
+    public function isClosed(): bool
+    {
+        return false;
+    }
+
     /**
      * Add a file to the opened Archive.
      *