diff --git a/hgext/lfs/__init__.py b/hgext/lfs/__init__.py
--- a/hgext/lfs/__init__.py
+++ b/hgext/lfs/__init__.py
@@ -174,6 +174,9 @@ configitem('experimental', 'lfs.serve',
 configitem('experimental', 'lfs.user-agent',
     default=None,
 )
+configitem('experimental', 'lfs.disableusercache',
+    default=False,
+)
 configitem('experimental', 'lfs.worker-enable',
     default=False,
 )
diff --git a/hgext/lfs/blobstore.py b/hgext/lfs/blobstore.py
--- a/hgext/lfs/blobstore.py
+++ b/hgext/lfs/blobstore.py
@@ -118,14 +118,12 @@ class local(object):
     def __init__(self, repo):
         fullpath = repo.svfs.join('lfs/objects')
         self.vfs = lfsvfs(fullpath)
-        usercache = util.url(lfutil._usercachedir(repo.ui, 'lfs'))
-        if usercache.scheme in (None, 'file'):
-            self.cachevfs = lfsvfs(usercache.localpath())
-        elif usercache.scheme == 'null':
+
+        if repo.ui.configbool('experimental', 'lfs.disableusercache'):
             self.cachevfs = nullvfs()
         else:
-            raise error.Abort(_('unknown lfs cache scheme: %s')
-                              % usercache.scheme)
+            usercache = lfutil._usercachedir(repo.ui, 'lfs')
+            self.cachevfs = lfsvfs(usercache)
         self.ui = repo.ui
 
     def open(self, oid):
diff --git a/tests/test-lfs-serve.t b/tests/test-lfs-serve.t
--- a/tests/test-lfs-serve.t
+++ b/tests/test-lfs-serve.t
@@ -33,8 +33,9 @@ side.  If that *is* enabled, the subsequ
 for flag '0x2000'!" if the extension is only loaded on one side (possibly also
 masked by the Internal Server Error message).
   $ cat >> $HGRCPATH <<EOF
+  > [experimental]
+  > lfs.disableusercache = True
   > [lfs]
-  > usercache = null://
   > threshold=10
   > [web]
   > allow_push=*