diff --git a/Cargo.toml b/Cargo.toml
index 693c7c7..1467369 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,10 +20,11 @@ se05x = { version = "0.0.1", optional = true }
 embedded-hal = { version = "0.2.7", optional = true }
 hex-literal = "0.4.1"
 rand_chacha = { version = "0.3.1", optional = true, default-features = false }
+trussed-se050-backend = { version = "0.1.0", optional = true }
 
 [features]
-default = ["se050"]
-se050 = ["dep:se05x", "embedded-hal", "rand_chacha"]
+default = []
+se050 = ["trussed-se050-backend"]
 
 log-all = []
 log-none = []
@@ -35,5 +36,6 @@ log-error = []
 [patch.crates-io]
 ctaphid-dispatch = { git = "https://github.com/trussed-dev/ctaphid-dispatch.git", rev = "57cb3317878a8593847595319aa03ef17c29ec5b" }
 trussed = { git = "https://github.com/trussed-dev/trussed.git", rev = "51e68500d7601d04f884f5e95567d14b9018a6cb" }
+trussed-se050-backend = { git = "https://github.com/Nitrokey/trussed-se050-backend.git", rev = "3395a5b73241a0a9f14a0715952be6fe7f1e56b0" }
 iso7816 = { git = "https://github.com/sosthene-nitrokey/iso7816.git", rev = "160ca3bbd8e21ec4e4ee1e0748e1eaa53a45c97f"}
-se05x = { git = "https://github.com/Nitrokey/se05x.git", rev = "db1ddea25cc382355b4292352652da656abc3005"} 
+se05x = { git = "https://github.com/Nitrokey/se05x.git", rev = "0b77eb6b152d214897696aadf87767fd84ffcb0e"} 
diff --git a/src/admin.rs b/src/admin.rs
index 3f762c4..c9842e9 100644
--- a/src/admin.rs
+++ b/src/admin.rs
@@ -1,13 +1,10 @@
+use super::Client as TrussedClient;
 use apdu_dispatch::iso7816::Status;
 use apdu_dispatch::{app as apdu, command, response, Command as ApduCommand};
 use core::{convert::TryInto, marker::PhantomData, time::Duration};
 use ctaphid_dispatch::app::{self as hid, Command as HidCommand, Message};
 use ctaphid_dispatch::command::VendorCommand;
-#[cfg(feature = "se050")]
-use embedded_hal::blocking::delay::DelayUs;
-#[cfg(feature = "se050")]
-use se05x::{se05x::Se05X, t1::I2CForT1};
-use trussed::{interrupt::InterruptFlag, syscall, types::Vec, Client as TrussedClient};
+use trussed::{interrupt::InterruptFlag, syscall, types::Vec};
 
 pub const USER_PRESENCE_TIMEOUT_SECS: u32 = 15;
 
@@ -30,18 +27,6 @@ const WINK: HidCommand = HidCommand::Wink; // 0x08
 
 const RNG_DATA_LEN: usize = 57;
 
-mod run_tests;
-use run_tests::*;
-
-/// Trait representing the possible ownership of the SE050 by the admin app.
-///
-/// Implemented by `()` and the `Se05X` struct
-pub trait MaybeSe: RunTests {}
-
-impl MaybeSe for () {}
-#[cfg(feature = "se050")]
-impl<Twi: I2CForT1, D: DelayUs<u32>> MaybeSe for Se05X<Twi, D> {}
-
 #[derive(PartialEq, Debug)]
 enum Command {
     Update,
@@ -153,7 +138,7 @@ pub trait Reboot {
     fn locked() -> bool;
 }
 
-pub struct App<T, R, S, Se05X = ()>
+pub struct App<T, R, S>
 where
     T: TrussedClient,
     R: Reboot,
@@ -165,7 +150,6 @@ where
     full_version: &'static str,
     status: S,
     boot_interface: PhantomData<R>,
-    se050: Se05X,
 }
 
 impl<T, R, S> App<T, R, S>
@@ -188,47 +172,8 @@ where
             full_version,
             status,
             boot_interface: PhantomData,
-            se050: (),
         }
     }
-}
-
-#[cfg(feature = "se050")]
-impl<T, R, S, Twi, D> App<T, R, S, Se05X<Twi, D>>
-where
-    T: TrussedClient,
-    R: Reboot,
-    S: AsRef<[u8]>,
-    Twi: I2CForT1,
-    D: DelayUs<u32>,
-{
-    pub fn with_se(
-        client: T,
-        uuid: [u8; 16],
-        version: u32,
-        full_version: &'static str,
-        status: S,
-        se050: Se05X<Twi, D>,
-    ) -> Self {
-        Self {
-            trussed: client,
-            uuid,
-            version,
-            full_version,
-            status,
-            boot_interface: PhantomData,
-            se050,
-        }
-    }
-}
-
-impl<T, R, S, Se05X> App<T, R, S, Se05X>
-where
-    T: TrussedClient,
-    R: Reboot,
-    S: AsRef<[u8]>,
-    Se05X: MaybeSe,
-{
     fn user_present(&mut self) -> bool {
         let user_present = syscall!(self
             .trussed
@@ -288,9 +233,15 @@ where
                 response.extend_from_slice(self.status.as_ref()).ok();
             }
             Command::TestSe05X => {
-                debug_now!("Running se050 tests");
-                if let Err(_err) = self.se050.run_tests(response) {
-                    debug_now!("se050 tests failed: {_err:?}");
+                #[cfg(feature = "se050")]
+                {
+                    let rep = syscall!(self.trussed.test_se050());
+                    response.extend_from_slice(&rep.reply).ok();
+                    return Ok(());
+                }
+                #[cfg(not(feature = "se050"))]
+                {
+                    return Err(Error::NotAvailable);
                 }
             }
         }
@@ -298,12 +249,11 @@ where
     }
 }
 
-impl<T, R, S, Se> hid::App<'static> for App<T, R, S, Se>
+impl<T, R, S> hid::App<'static> for App<T, R, S>
 where
     T: TrussedClient,
     R: Reboot,
     S: AsRef<[u8]>,
-    Se: MaybeSe,
 {
     fn commands(&self) -> &'static [HidCommand] {
         &[
@@ -342,12 +292,11 @@ where
     }
 }
 
-impl<T, R, S, Se> iso7816::App for App<T, R, S, Se>
+impl<T, R, S> iso7816::App for App<T, R, S>
 where
     T: TrussedClient,
     R: Reboot,
     S: AsRef<[u8]>,
-    Se: MaybeSe,
 {
     // Solo management app
     fn aid(&self) -> iso7816::Aid {
@@ -355,12 +304,11 @@ where
     }
 }
 
-impl<T, R, S, Se> apdu::App<{ command::SIZE }, { response::SIZE }> for App<T, R, S, Se>
+impl<T, R, S> apdu::App<{ command::SIZE }, { response::SIZE }> for App<T, R, S>
 where
     T: TrussedClient,
     R: Reboot,
     S: AsRef<[u8]>,
-    Se: MaybeSe,
 {
     fn select(&mut self, _apdu: &ApduCommand, _reply: &mut response::Data) -> apdu::Result {
         Ok(())
diff --git a/src/lib.rs b/src/lib.rs
index ec8a355..485dc7b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -12,3 +12,13 @@ generate_macros!();
 
 mod admin;
 pub use admin::{App, Reboot};
+
+#[cfg(not(feature = "se050"))]
+pub trait Client: trussed::Client {}
+#[cfg(not(feature = "se050"))]
+impl<C: trussed::Client> Client for C {}
+
+#[cfg(feature = "se050")]
+pub trait Client: trussed::Client + trussed_se050_backend::manage::ManageClient {}
+#[cfg(feature = "se050")]
+impl<C: trussed::Client + trussed_se050_backend::manage::ManageClient> Client for C {}