Trying to get the tests back working

test/runtime/src/lib.rs

@@ -0,0 +1,23 @@
+// Copyright 2019 Parity Technologies (UK) Ltd.
+// This file is part of Substrate.
+
+// Substrate is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Substrate is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+
+//! A Cumulus test runtime.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use substrate_test_runtime::{Block, system::BlockExecutor};
+
+runtime::register_validate_block!(Block, BlockExecutor);