diff --git a/platformio/unpacker.py b/platformio/unpacker.py
index 271b4911..4d018072 100644
--- a/platformio/unpacker.py
+++ b/platformio/unpacker.py
@@ -110,7 +110,7 @@ class FileUnpacker(object):
         if self._unpacker:
             self._unpacker.close()
 
-    def unpack(self, dest_dir=".", with_progress=True):
+    def unpack(self, dest_dir=".", with_progress=True, check_unpacked=True):
         assert self._unpacker
         if not with_progress:
             click.echo("Unpacking...")
@@ -122,6 +122,9 @@ class FileUnpacker(object):
                 for item in pb:
                     self._unpacker.extract_item(item, dest_dir)
 
+        if not check_unpacked:
+            return True
+
         # check on disk
         for item in self._unpacker.get_items():
             filename = self._unpacker.get_item_filename(item)