diff --git a/.travis.sh b/.travis.sh
index 6becd44..338ad72 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -5,7 +5,7 @@ eval `opam config env`
 export BISECT_FILE=_build/xenvm.coverage
 # Needed to support Unix domain sockets:
 sudo opam pin add conduit git://github.com/mirage/ocaml-conduit -y
-sudo make test
+make test
 
 echo Generating bisect report-- this fails on travis
 (cd _build; bisect-report xenvm*.out -summary-only -html /vagrant/report/ || echo Ignoring bisect-report failure)
diff --git a/.travis.yml b/.travis.yml
index 8e7e0fb..e864854 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: c
 install: wget https://raw.githubusercontent.com/ocaml/ocaml-travisci-skeleton/master/.travis-opam.sh
 script: cp .travis.oasis _oasis && bash -ex .travis-opam.sh && bash -ex .travis.sh
+sudo: true
 env:
-  - OCAML_VERSION=4.02 PACKAGE=thin_lvhd_tools EXTRA_REMOTES="git://github.com/xapi-project/thin-lvhd-opam-repo"
-sudo: required
+  - OCAML_VERSION=4.02 PACKAGE=thin_lvhd_tools EXTRA_REMOTES="git://github.com/xapi-project/thin-lvhd-opam-repo" TESTS=true PINS="conduit:git://github.com/mirage/ocaml-conduit"
diff --git a/test/common.ml b/test/common.ml
index e2fd45b..5c939c0 100644
--- a/test/common.ml
+++ b/test/common.ml
@@ -17,6 +17,9 @@ open Lvm
 open Vg
 open Lwt
 
+(* Mock kernel devices so we can run as a regular user *)
+let use_mock = ref true
+
 module Log = struct
   let debug fmt = Printf.ksprintf (fun s -> print_endline s) fmt
   let info  fmt = Printf.ksprintf (fun s -> print_endline s) fmt
@@ -227,7 +230,7 @@ let with_temp_file fn =
   result
   (* NB we leak the file on error, but this is quite useful *)
 
-let with_loop_device path f =
+let with_loop_device path f = if !use_mock then f path else begin
   ignore_string (run "losetup" [ "-f"; path ]);
   (* /dev/loop0: [fd00]:1973802 (/tmp/SR.createc04251volume) *)
   let line = run "losetup" [ "-j"; path ] in
@@ -241,6 +244,7 @@ let with_loop_device path f =
     error "Failed to parse output of losetup -j: [%s]" line;
     ignore_string (run "losetup" [ "-d"; path ]);
     failwith (Printf.sprintf "Failed to parse output of losetup -j: [%s]" line)
+end
 
 let with_block filename f =
   let open Lwt in
@@ -251,5 +255,9 @@ let with_block filename f =
   | `Ok x ->
     f x (* no point catching errors here *)
 
-let xenvm = run "./xenvm.native"
+let xenvm = function
+  | [] -> run "./xenvm.native" []
+  | cmd :: args ->
+    let args = if !use_mock then "--mock-devmapper" :: "--configdir" :: "/tmp/xenvm.d" :: args else args in
+    run "./xenvm.native" (cmd :: args)
 let xenvmd = run "./xenvmd.native"
diff --git a/test/test.ml b/test/test.ml
index dbda008..0dc9b87 100644
--- a/test/test.ml
+++ b/test/test.ml
@@ -41,7 +41,7 @@ let vgs_offline =
   (fun () ->
     with_temp_file (fun filename ->
       xenvm [ "vgcreate"; vg; filename ] |> ignore_string;
-      mkdir_rec "/etc/xenvm.d" 0o0644;
+      mkdir_rec "/tmp/xenvm.d" 0o0755;
       xenvm [ "set-vg-info"; "--pvpath"; filename; "-S"; "/tmp/xenvmd"; vg; "--local-allocator-path"; "/tmp/xenvm-local-allocator"; "--uri"; "file://local/services/xenvmd/"^vg ] |> ignore_string;
       xenvm [ "vgs"; vg ] |> ignore_string
     )
@@ -118,13 +118,17 @@ let lvchange_n =
   let vg_metadata, lv_metadata = Lwt_main.run (Client.get_lv "test") in
   let name = Mapper.name_of vg_metadata lv_metadata in
   xenvm [ "lvchange"; "-ay"; "/dev/" ^ vg ^ "/test" ] |> ignore_string;
+  if not !Common.use_mock then begin (* FIXME: #99 *)
   assert_equal ~printer:string_of_bool true (file_exists (dev_path_of "test"));
   assert_equal ~printer:string_of_bool true (file_exists (mapper_path_of "test"));
   assert_equal ~printer:string_of_bool true (dm_exists name);
+  end;
   xenvm [ "lvchange"; "-an"; "/dev/" ^ vg ^ "/test" ] |> ignore_string;
+  if not !Common.use_mock then begin (* FIXME: #99 *)
   assert_equal ~printer:string_of_bool false (file_exists (dev_path_of"test"));
   assert_equal ~printer:string_of_bool false (file_exists (mapper_path_of"test"));
   assert_equal ~printer:string_of_bool false (dm_exists name);
+  end;
   xenvm [ "lvremove"; vg ^ "/test" ] |> ignore_string
 
 let parse_int x =
@@ -155,11 +159,11 @@ let xenvmd_suite = "Commands which require xenvmd" >::: [
 ]
 
 let _ =
+  mkdir_rec "/tmp/xenvm.d" 0o0755;
   run_test_tt_main no_xenvmd_suite |> ignore;
   with_temp_file (fun filename' ->
     with_loop_device filename' (fun loop ->
       xenvm [ "vgcreate"; vg; loop ] |> ignore_string;
-      mkdir_rec "/etc/xenvm.d" 0o0644;
       xenvm [ "set-vg-info"; "--pvpath"; loop; "-S"; "/tmp/xenvmd"; vg; "--local-allocator-path"; "/tmp/xenvm-local-allocator"; "--uri"; "file://local/services/xenvmd/"^vg ] |> ignore_string;
       file_of_string "test.xenvmd.conf" ("( (listenPort ()) (listenPath (Some \"/tmp/xenvmd\")) (host_allocation_quantum 128) (host_low_water_mark 8) (vg "^vg^") (devices ("^loop^")))");
       xenvmd [ "--config"; "./test.xenvmd.conf"; "--daemon" ] |> ignore_string;
diff --git a/xenvm/vgcreate.ml b/xenvm/vgcreate.ml
index a6159fa..b5643f4 100644
--- a/xenvm/vgcreate.ml
+++ b/xenvm/vgcreate.ml
@@ -3,7 +3,7 @@ open Lwt
 open Xenvm_common
 open Errors
 
-let vgcreate vg_name devices =
+let vgcreate _ vg_name devices =
   let open Lvm in
   let t =
     let module Vg_IO = Vg.Make(Log)(Block)(Time)(Clock) in
@@ -61,5 +61,5 @@ let vgcreate_cmd =
     `S "DESCRIPTION";
     `P "vgcreate creates a volume group on the specified physical block devices";
   ] in
-  Term.(pure vgcreate $ vg_name_arg $ devices_arg),
+  Term.(pure vgcreate $ Xenvm_common.copts_t $ vg_name_arg $ devices_arg),
   Term.info "vgcreate" ~sdocs:copts_sect ~doc ~man