diff --git a/matrix_sdk_crypto/src/device.rs b/matrix_sdk_crypto/src/device.rs
index eafb193b..aecdd27a 100644
--- a/matrix_sdk_crypto/src/device.rs
+++ b/matrix_sdk_crypto/src/device.rs
@@ -131,6 +131,11 @@ impl Device {
         self.trust_state.load(Ordering::Relaxed)
     }
 
+    /// Is the device locally marked trusted.
+    pub fn is_trusted(&self) -> bool {
+        self.trust_state() == TrustState::Verified
+    }
+
     /// Set the trust state of the device to the given state.
     ///
     /// Note: This should only done in the cryptostore where the trust state can
diff --git a/matrix_sdk_crypto/src/machine.rs b/matrix_sdk_crypto/src/machine.rs
index 215bb763..8208d02f 100644
--- a/matrix_sdk_crypto/src/machine.rs
+++ b/matrix_sdk_crypto/src/machine.rs
@@ -1393,6 +1393,7 @@ mod test {
 
     use crate::{
         machine::{OlmMachine, OneTimeKeys},
+        verification::test::request_to_event,
         verify_json, Device, EncryptionSettings,
     };
 
@@ -1982,4 +1983,86 @@ mod test {
         assert_eq!(&*device_id, machine.device_id());
         assert_eq!(ed25519_key, machine.identity_keys().ed25519());
     }
+
+    #[tokio::test]
+    async fn interactive_verification() {
+        let (alice, bob) = get_machine_pair_with_setup_sessions().await;
+
+        let bob_device = alice
+            .get_device(bob.user_id(), bob.device_id())
+            .await
+            .unwrap();
+
+        assert!(!bob_device.is_trusted());
+
+        let (alice_sas, request) = alice.start_verification(bob_device.clone());
+
+        let mut event = request_to_event(alice.user_id(), &request);
+        bob.handle_verification_event(&mut event).await;
+
+        let bob_sas = bob.get_verification(alice_sas.flow_id()).unwrap();
+
+        assert!(alice_sas.emoji().is_none());
+        assert!(bob_sas.emoji().is_none());
+
+        let mut event = bob_sas
+            .accept()
+            .map(|r| request_to_event(bob.user_id(), &r))
+            .unwrap();
+
+        alice.handle_verification_event(&mut event).await;
+
+        let mut event = alice
+            .outgoing_to_device_requests()
+            .iter()
+            .next()
+            .map(|r| request_to_event(alice.user_id(), &r))
+            .unwrap();
+        bob.handle_verification_event(&mut event).await;
+
+        let mut event = bob
+            .outgoing_to_device_requests()
+            .iter()
+            .next()
+            .map(|r| request_to_event(bob.user_id(), &r))
+            .unwrap();
+        alice.handle_verification_event(&mut event).await;
+
+        assert!(alice_sas.emoji().is_some());
+        assert!(bob_sas.emoji().is_some());
+
+        assert_eq!(alice_sas.emoji(), bob_sas.emoji());
+        assert_eq!(alice_sas.decimals(), bob_sas.decimals());
+
+        let mut event = bob_sas
+            .confirm()
+            .await
+            .unwrap()
+            .map(|r| request_to_event(bob.user_id(), &r))
+            .unwrap();
+        alice.handle_verification_event(&mut event).await;
+
+        assert!(!alice_sas.is_done());
+        assert!(!bob_sas.is_done());
+
+        let mut event = alice_sas
+            .confirm()
+            .await
+            .unwrap()
+            .map(|r| request_to_event(alice.user_id(), &r))
+            .unwrap();
+
+        assert!(alice_sas.is_done());
+        assert!(bob_device.is_trusted());
+
+        let alice_device = bob
+            .get_device(alice.user_id(), alice.device_id())
+            .await
+            .unwrap();
+
+        assert!(!alice_device.is_trusted());
+        bob.handle_verification_event(&mut event).await;
+        assert!(bob_sas.is_done());
+        assert!(alice_device.is_trusted());
+    }
 }
diff --git a/matrix_sdk_crypto/src/verification/mod.rs b/matrix_sdk_crypto/src/verification/mod.rs
index db955382..c7a6ad94 100644
--- a/matrix_sdk_crypto/src/verification/mod.rs
+++ b/matrix_sdk_crypto/src/verification/mod.rs
@@ -29,6 +29,14 @@ pub(crate) mod test {
         identifiers::UserId,
     };
 
+    pub(crate) fn request_to_event(
+        sender: &UserId,
+        request: &OwnedToDeviceRequest,
+    ) -> AnyToDeviceEvent {
+        let content = get_content_from_request(request);
+        wrap_any_to_device_content(sender, content)
+    }
+
     pub(crate) fn wrap_any_to_device_content(
         sender: &UserId,
         content: AnyToDeviceEventContent,