diff --git a/substrate/core/network/src/test/mod.rs b/substrate/core/network/src/test/mod.rs
index f8869fcc81..d3975e032b 100644
--- a/substrate/core/network/src/test/mod.rs
+++ b/substrate/core/network/src/test/mod.rs
@@ -194,6 +194,11 @@ impl<V: 'static + Verifier<Block>, D> Peer<V, D> {
 		io.to_disconnect.clone()
 	}
 
+	fn with_io<'a, F, U>(&'a self, f: F) -> U where F: FnOnce(&mut TestIo<'a>) -> U {
+		let mut io = TestIo::new(&self.queue, None);
+		f(&mut io)
+	}
+
 	/// Produce the next pending message to send to another peer.
 	fn pending_message(&self) -> Option<TestPacket> {
 		self.flush();
diff --git a/substrate/core/network/src/test/sync.rs b/substrate/core/network/src/test/sync.rs
index 6b1af9a6af..4d714eb828 100644
--- a/substrate/core/network/src/test/sync.rs
+++ b/substrate/core/network/src/test/sync.rs
@@ -90,12 +90,14 @@ fn sync_after_fork_works() {
 }
 
 #[test]
-#[ignore] // reinstate when import queue handlers dispatch announce messages.
 fn own_blocks_are_announced() {
 	::env_logger::init().ok();
 	let mut net = TestNet::new(3);
 	net.sync(); // connect'em
 	net.peer(0).generate_blocks(1, BlockOrigin::Own, |builder| builder.bake().unwrap());
+
+	let header = net.peer(0).client().header(&BlockId::Number(1)).unwrap().unwrap();
+	net.peer(0).with_io(|io| net.peer(0).sync.on_block_imported(io, header.hash(), &header));
 	net.sync();
 	assert_eq!(net.peer(0).client.backend().blockchain().info().unwrap().best_number, 1);
 	assert_eq!(net.peer(1).client.backend().blockchain().info().unwrap().best_number, 1);