diff --git a/tests/gnupgt.inc b/tests/gnupgt.inc
index 25cc1ae..c31415d 100644
--- a/tests/gnupgt.inc
+++ b/tests/gnupgt.inc
@@ -29,7 +29,7 @@ class gnupgt {
             return;
         }
         foreach (glob($homeDir . '/*') as $filename) {
-            if (is_file($filename)) {
+            if (!is_dir($filename)) {
                 unlink($filename);
             }
         }
@@ -208,4 +208,4 @@ class gnupgt {
         self::check_array(2048, $ret, 0, 'subkeys', 1, 'length');
         self::check_array_from_version('1.7.0', false, $ret, 0, 'subkeys', 1, 'is_cardkey');
     }
-}
\ No newline at end of file
+}