diff --git a/dvc/progress.py b/dvc/progress.py
index b5ccdeea0..5fe0f60b9 100644
--- a/dvc/progress.py
+++ b/dvc/progress.py
@@ -41,6 +41,8 @@ class Progress(tqdm):
     """
     def __init__(self):
         super(Progress, self).__init__(total=0, disable=True)
+        from time import time
+        self._time = time
         self.set_lock(Lock())
         self._targets = {}
         self.clearln()
diff --git a/dvc/remote/http.py b/dvc/remote/http.py
index 715465293..f39c5a3e3 100644
--- a/dvc/remote/http.py
+++ b/dvc/remote/http.py
@@ -70,7 +70,7 @@ class RemoteHTTP(RemoteBASE):
 
         for path_info in path_infos:
             results.append(self.exists(path_info))
-            callback.update(str(path_info))
+            callback(str(path_info))
 
         return results