diff --git a/molecule/specs/plugins/image_plugin.py b/molecule/specs/plugins/image_plugin.py
index 8efdb2d..1a5f912 100644
--- a/molecule/specs/plugins/image_plugin.py
+++ b/molecule/specs/plugins/image_plugin.py
@@ -163,7 +163,7 @@ class ImageHandler(GenericExecutionStep, BuiltinHandlerMixin):
         while image_mb > 0:
             image_mb -= 1
             if self.randomize:
-                arr = array.array('c', molecule.utils.get_random_str(mb_bytes))
+                arr = array.array('c', os.urandom(mb_bytes))
             else:
                 arr = array.array('c', chr(0)*mb_bytes)
             arr.tofile(loop_f)