diff --git a/tcpip.opam b/tcpip.opam
index d7244549..0796f407 100644
--- a/tcpip.opam
+++ b/tcpip.opam
@@ -44,7 +44,7 @@ depends: [
   "ethernet" {>= "3.0.0"}
   "arp" {>= "3.0.0"}
   "mirage-flow" {>= "4.0.0"}
-  "mirage-vnetif" {with-test & >= "0.5.0"}
+  "mirage-vnetif" {with-test & >= "0.6.2"}
   "alcotest" {with-test & >="1.5.0"}
   "pcap-format" {with-test}
   "mirage-clock-unix" {with-test & >= "3.0.0"}
diff --git a/test/vnetif_backends.ml b/test/vnetif_backends.ml
index db7e0574..f673b8cc 100644
--- a/test/vnetif_backends.ml
+++ b/test/vnetif_backends.ml
@@ -29,11 +29,6 @@ module Frame_size_enforced = struct
     mutable frame_size : int;
   }
 
-  type macaddr = X.macaddr
-  type 'a io = 'a X.io
-  type buffer = X.buffer
-  type id = X.id
-
   let register t =
     X.register t.xt
 
@@ -142,11 +137,6 @@ module Drop_1_second_after_1_megabyte : Backend = struct
     mutable done_dropping : bool;
   }
 
-  type macaddr = X.macaddr
-  type 'a io = 'a X.io
-  type buffer = X.buffer
-  type id = X.id
-
   let byte_limit : int = 1_000_000
   let time_to_sleep : float = 1.0
 
diff --git a/test/vnetif_common.ml b/test/vnetif_common.ml
index d25bdedb..702292ec 100644
--- a/test/vnetif_common.ml
+++ b/test/vnetif_common.ml
@@ -30,9 +30,6 @@ module Clock = Mclock
 module type VNETIF_STACK =
 sig
   type backend
-  type buffer
-  type 'a io
-  type id
   module Stack : Tcpip.Stack.V4V6
 
   (** Create a new backend *)
@@ -43,10 +40,10 @@ sig
     ?gateway:Ipaddr.V4.t -> ?cidr6:Ipaddr.V6.Prefix.t ->
     ?gateway6:Ipaddr.V6.t -> backend -> Stack.t Lwt.t
 
-  val create_backend_listener : backend -> (buffer -> unit io) -> id
+  val create_backend_listener : backend -> (Cstruct.t -> unit Lwt.t) -> int
 
   (** Disable a listener function *)
-  val disable_backend_listener : backend -> id -> unit io
+  val disable_backend_listener : backend -> int -> unit Lwt.t
 
   (** Records pcap data from the backend while running the specified
       function. Disables the pcap recorder when the function exits. *)
@@ -62,9 +59,6 @@ module VNETIF_STACK (B: Vnetif_backends.Backend): sig
 end
 = struct
   type backend = B.t
-  type buffer = B.buffer
-  type 'a io = 'a B.io
-  type id = B.id
 
   module V = Vnetif.Make(B)
   module E = Ethernet.Make(V)