diff --git a/lighthouse/db/src/stores/beacon_block_store.rs b/lighthouse/db/src/stores/beacon_block_store.rs
index a60dc435ed..615c8fbe77 100644
--- a/lighthouse/db/src/stores/beacon_block_store.rs
+++ b/lighthouse/db/src/stores/beacon_block_store.rs
@@ -104,7 +104,7 @@ mod tests {
         let ssz = "some bytes".as_bytes();
         let hash = &Hash256::from("some hash".as_bytes()).to_vec();
 
-        store.put_serialized_block(hash, ssz);
+        store.put_serialized_block(hash, ssz).unwrap();
         assert_eq!(db.get(DB_COLUMN, hash).unwrap().unwrap(), ssz);
     }
 
@@ -116,7 +116,7 @@ mod tests {
         let ssz = "some bytes".as_bytes();
         let hash = &Hash256::from("some hash".as_bytes()).to_vec();
 
-        db.put(DB_COLUMN, hash, ssz);
+        db.put(DB_COLUMN, hash, ssz).unwrap();
         assert_eq!(store.get_serialized_block(hash).unwrap().unwrap(), ssz);
     }
 
@@ -128,7 +128,7 @@ mod tests {
         let ssz = "some bytes".as_bytes();
         let hash = &Hash256::from("some hash".as_bytes()).to_vec();
 
-        db.put(DB_COLUMN, hash, ssz);
+        db.put(DB_COLUMN, hash, ssz).unwrap();
         assert!(store.block_exists(hash).unwrap());
     }
 
@@ -141,7 +141,7 @@ mod tests {
         let hash = &Hash256::from("some hash".as_bytes()).to_vec();
         let other_hash = &Hash256::from("another hash".as_bytes()).to_vec();
 
-        db.put(DB_COLUMN, hash, ssz);
+        db.put(DB_COLUMN, hash, ssz).unwrap();
         assert!(!store.block_exists(other_hash).unwrap());
     }
 
@@ -153,10 +153,10 @@ mod tests {
         let ssz = "some bytes".as_bytes();
         let hash = &Hash256::from("some hash".as_bytes()).to_vec();
 
-        db.put(DB_COLUMN, hash, ssz);
+        db.put(DB_COLUMN, hash, ssz).unwrap();
         assert!(db.exists(DB_COLUMN, hash).unwrap());
 
-        store.delete_block(hash);
+        store.delete_block(hash).unwrap();
         assert!(!db.exists(DB_COLUMN, hash).unwrap());
     }
 
diff --git a/lighthouse/db/src/stores/pow_chain_store.rs b/lighthouse/db/src/stores/pow_chain_store.rs
index 382667ea0e..493df47f86 100644
--- a/lighthouse/db/src/stores/pow_chain_store.rs
+++ b/lighthouse/db/src/stores/pow_chain_store.rs
@@ -26,7 +26,7 @@ impl<T: ClientDB> PoWChainStore<T> {
 #[cfg(test)]
 mod tests {
     extern crate rand;
-    
+
     use super::*;
     use super::super::super::MemoryDB;
 
@@ -36,7 +36,7 @@ mod tests {
         let store = PoWChainStore::new(db.clone());
 
         let hash: &[u8] = &[rand::random()];
-        store.put_block_hash(hash);
+        store.put_block_hash(hash).unwrap();
 
         assert!(db.exists(DB_COLUMN, hash).unwrap());
     }
@@ -47,7 +47,7 @@ mod tests {
         let store = PoWChainStore::new(db.clone());
 
         let hash: &[u8] = &[rand::random()];
-        db.put(DB_COLUMN, hash, &[0]);
+        db.put(DB_COLUMN, hash, &[0]).unwrap();
 
         assert!(store.block_hash_exists(hash).unwrap());
     }
@@ -59,7 +59,7 @@ mod tests {
 
         let hash: &[u8] = &[rand::random()];
         let other_hash: &[u8] = &[rand::random()];
-        db.put(DB_COLUMN, hash, &[0]);
+        db.put(DB_COLUMN, hash, &[0]).unwrap();
 
         assert!(!store.block_hash_exists(other_hash).unwrap());
     }