diff --git a/rpc/src/v1/impls/ethcore.rs b/rpc/src/v1/impls/ethcore.rs
index 3a97c9b62..220ead3dd 100644
--- a/rpc/src/v1/impls/ethcore.rs
+++ b/rpc/src/v1/impls/ethcore.rs
@@ -231,6 +231,6 @@ impl<C, M, S: ?Sized> Ethcore for EthcoreClient<C, M, S> where M: MinerService +
 		try!(self.active());
 		try!(expect_no_params(params));
 
-		to_value(&take_weak!(self.miner).all_transactions().into_iter().map(Into::into).collect::<Vec<Transaction>>())
+		Ok(to_value(&take_weak!(self.miner).all_transactions().into_iter().map(Into::into).collect::<Vec<Transaction>>()))
 	}
 }
diff --git a/rpc/src/v1/tests/mocked/ethcore.rs b/rpc/src/v1/tests/mocked/ethcore.rs
index 5cdd94b63..811ccced4 100644
--- a/rpc/src/v1/tests/mocked/ethcore.rs
+++ b/rpc/src/v1/tests/mocked/ethcore.rs
@@ -299,5 +299,5 @@ fn rpc_ethcore_pending_transactions() {
 	let request = r#"{"jsonrpc": "2.0", "method": "ethcore_pendingTransactions", "params":[], "id": 1}"#;
 	let response = r#"{"jsonrpc":"2.0","result":[],"id":1}"#;
 
-	assert_eq!(io.handle_request(request), Some(response.to_owned()));
+	assert_eq!(io.handle_request_sync(request), Some(response.to_owned()));
 }