diff --git a/eth2/fork_choice/Cargo.toml b/eth2/fork_choice/Cargo.toml
index 566334c76..82d5785b9 100644
--- a/eth2/fork_choice/Cargo.toml
+++ b/eth2/fork_choice/Cargo.toml
@@ -10,3 +10,7 @@ ssz = { path = "../utils/ssz" }
 types = { path = "../types" }
 fast-math = "0.1.1"
 byteorder = "1.3.1"
+
+[dev-dependencies]
+yaml-rust = "0.4.2"
+bls = { path = "../utils/bls" }
diff --git a/eth2/fork_choice/src/lib.rs b/eth2/fork_choice/src/lib.rs
index a6e4ea422..e876ed60f 100644
--- a/eth2/fork_choice/src/lib.rs
+++ b/eth2/fork_choice/src/lib.rs
@@ -51,6 +51,10 @@ use db::stores::BeaconBlockAtSlotError;
 use db::DBError;
 use types::{BeaconBlock, Hash256};
 
+// export the main structs
+pub use longest_chain::LongestChain;
+pub use optimised_lmd_ghost::OptimisedLMDGhost;
+
 /// Defines the interface for Fork Choices. Each Fork choice will define their own data structures
 /// which can be built in block processing through the `add_block` and `add_attestation` functions.
 /// The main fork choice algorithm is specified in `find_head