diff --git a/deltachat-ffi/src/lib.rs b/deltachat-ffi/src/lib.rs
index 4cd4637f3..e92f30a55 100644
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -559,6 +559,7 @@ pub unsafe extern "C" fn dc_event_get_id(event: *mut dc_event_t) -> libc::c_int
         EventType::IncomingCallAccepted { .. } => 2560,
         EventType::OutgoingCallAccepted { .. } => 2570,
         EventType::CallEnded { .. } => 2580,
+        EventType::TransportsModified => 2600,
         #[allow(unreachable_patterns)]
         #[cfg(test)]
         _ => unreachable!("This is just to silence a rust_analyzer false-positive"),
@@ -593,7 +594,8 @@ pub unsafe extern "C" fn dc_event_get_data1_int(event: *mut dc_event_t) -> libc:
         | EventType::AccountsBackgroundFetchDone
         | EventType::ChatlistChanged
         | EventType::AccountsChanged
-        | EventType::AccountsItemChanged => 0,
+        | EventType::AccountsItemChanged
+        | EventType::TransportsModified => 0,
         EventType::IncomingReaction { contact_id, .. }
         | EventType::IncomingWebxdcNotify { contact_id, .. } => contact_id.to_u32() as libc::c_int,
         EventType::MsgsChanged { chat_id, .. }
@@ -681,7 +683,8 @@ pub unsafe extern "C" fn dc_event_get_data2_int(event: *mut dc_event_t) -> libc:
         | EventType::IncomingCallAccepted { .. }
         | EventType::OutgoingCallAccepted { .. }
         | EventType::CallEnded { .. }
-        | EventType::EventChannelOverflow { .. } => 0,
+        | EventType::EventChannelOverflow { .. }
+        | EventType::TransportsModified => 0,
         EventType::MsgsChanged { msg_id, .. }
         | EventType::ReactionsChanged { msg_id, .. }
         | EventType::IncomingReaction { msg_id, .. }
@@ -780,7 +783,8 @@ pub unsafe extern "C" fn dc_event_get_data2_str(event: *mut dc_event_t) -> *mut
         | EventType::AccountsChanged
         | EventType::AccountsItemChanged
         | EventType::IncomingCallAccepted { .. }
-        | EventType::WebxdcRealtimeAdvertisementReceived { .. } => ptr::null_mut(),
+        | EventType::WebxdcRealtimeAdvertisementReceived { .. }
+        | EventType::TransportsModified => ptr::null_mut(),
         EventType::IncomingCall {
             place_call_info, ..
         } => {
diff --git a/deltachat-jsonrpc/src/api/types/events.rs b/deltachat-jsonrpc/src/api/types/events.rs
index f7957e32d..beeee4334 100644
--- a/deltachat-jsonrpc/src/api/types/events.rs
+++ b/deltachat-jsonrpc/src/api/types/events.rs
@@ -460,6 +460,15 @@ pub enum EventType {
         /// ID of the chat which the message belongs to.
         chat_id: u32,
     },
+
+    /// One or more transports has changed.
+    ///
+    /// This event is used for tests to detect when transport
+    /// synchronization messages arrives.
+    /// UIs don't need to use it, it is unlikely
+    /// that user modifies transports on multiple
+    /// devices simultaneously.
+    TransportsModified,
 }
 
 impl From<CoreEventType> for EventType {
@@ -642,6 +651,8 @@ impl From<CoreEventType> for EventType {
                 msg_id: msg_id.to_u32(),
                 chat_id: chat_id.to_u32(),
             },
+            CoreEventType::TransportsModified => TransportsModified,
+
             #[allow(unreachable_patterns)]
             #[cfg(test)]
             _ => unreachable!("This is just to silence a rust_analyzer false-positive"),
diff --git a/deltachat-rpc-client/src/deltachat_rpc_client/const.py b/deltachat-rpc-client/src/deltachat_rpc_client/const.py
index 03ae2d7b3..cee9536be 100644
--- a/deltachat-rpc-client/src/deltachat_rpc_client/const.py
+++ b/deltachat-rpc-client/src/deltachat_rpc_client/const.py
@@ -80,6 +80,7 @@ class EventType(str, Enum):
     CONFIG_SYNCED = "ConfigSynced"
     WEBXDC_REALTIME_DATA = "WebxdcRealtimeData"
     WEBXDC_REALTIME_ADVERTISEMENT_RECEIVED = "WebxdcRealtimeAdvertisementReceived"
+    TRANSPORTS_MODIFIED = "TransportsModified"
 
 
 class ChatId(IntEnum):
diff --git a/src/events/payload.rs b/src/events/payload.rs
index bf7e1fa35..f2540bce1 100644
--- a/src/events/payload.rs
+++ b/src/events/payload.rs
@@ -417,6 +417,15 @@ pub enum EventType {
         chat_id: ChatId,
     },
 
+    /// One or more transports has changed.
+    ///
+    /// This event is used for tests to detect when transport
+    /// synchronization messages arrives.
+    /// UIs don't need to use it, it is unlikely
+    /// that user modifies transports on multiple
+    /// devices simultaneously.
+    TransportsModified,
+
     /// Event for using in tests, e.g. as a fence between normally generated events.
     #[cfg(test)]
     Test,