diff --git a/beacon_node/beacon_chain/src/beacon_chain.rs b/beacon_node/beacon_chain/src/beacon_chain.rs
index 436d5a246a..9eaa7d7c12 100644
--- a/beacon_node/beacon_chain/src/beacon_chain.rs
+++ b/beacon_node/beacon_chain/src/beacon_chain.rs
@@ -415,7 +415,7 @@ where
     /// Accept some block and attempt to add it to block DAG.
     ///
     /// Will accept blocks from prior slots, however it will reject any block from a future slot.
-    pub fn process_block<V>(&self, block: BeaconBlock) -> Result<BlockProcessingOutcome, Error> {
+    pub fn process_block(&self, block: BeaconBlock) -> Result<BlockProcessingOutcome, Error> {
         debug!("Processing block with slot {}...", block.slot());
 
         let block_root = block.canonical_root();
diff --git a/beacon_node/beacon_chain/test_harness/src/harness.rs b/beacon_node/beacon_chain/test_harness/src/harness.rs
index 7bc86a7e12..12ed40755c 100644
--- a/beacon_node/beacon_chain/test_harness/src/harness.rs
+++ b/beacon_node/beacon_chain/test_harness/src/harness.rs
@@ -1,6 +1,6 @@
 use super::TestValidator;
 use beacon_chain::BeaconChain;
-pub use beacon_chain::{dump::Error as DumpError, CheckPoint};
+pub use beacon_chain::{CheckPoint, Error as BeaconChainError};
 use db::{
     stores::{BeaconBlockStore, BeaconStateStore},
     MemoryDB,
@@ -219,7 +219,7 @@ impl BeaconChainHarness {
     }
 
     /// Dump all blocks and states from the canonical beacon chain.
-    pub fn chain_dump(&self) -> Result<Vec<CheckPoint>, DumpError> {
+    pub fn chain_dump(&self) -> Result<Vec<CheckPoint>, BeaconChainError> {
         self.beacon_chain.chain_dump()
     }
 
diff --git a/beacon_node/beacon_chain/test_harness/src/validator/beacon_node/producer.rs b/beacon_node/beacon_chain/test_harness/src/validator/beacon_node/producer.rs
index 36c82f6ccc..d188d8554f 100644
--- a/beacon_node/beacon_chain/test_harness/src/validator/beacon_node/producer.rs
+++ b/beacon_node/beacon_chain/test_harness/src/validator/beacon_node/producer.rs
@@ -30,7 +30,9 @@ impl<T: ClientDB, U: SlotClock> BeaconBlockNode for DirectBeaconNode<T, U> {
         let (block, _state) = self
             .beacon_chain
             .produce_block(randao_reveal.clone())
-            .map_err(|e| BeaconBlockNodeError::RemoteFailure(format!("{:?}", e)))?;
+            .ok_or_else(|| {
+                BeaconBlockNodeError::RemoteFailure(format!("Did not produce block."))
+            })?;
 
         if block.slot == slot {
             Ok(Some(block))