diff --git a/eth2/types/src/beacon_state/tests.rs b/eth2/types/src/beacon_state/tests.rs
index 7f43ae9a1..01b4be803 100644
--- a/eth2/types/src/beacon_state/tests.rs
+++ b/eth2/types/src/beacon_state/tests.rs
@@ -7,7 +7,8 @@ use ssz::{ssz_encode, Decodable};
 
 #[test]
 pub fn can_produce_genesis_block() {
-    let builder = BeaconStateBuilder::with_random_validators(2);
+    let mut builder = BeaconStateBuilder::with_random_validators(2);
+    builder.genesis().unwrap();
 
     builder.build().unwrap();
 }
@@ -21,6 +22,8 @@ pub fn get_attestation_participants_consistency() {
     let mut builder = BeaconStateBuilder::with_random_validators(8);
     builder.spec = ChainSpec::few_validators();
 
+    builder.genesis().unwrap();
+
     let mut state = builder.build().unwrap();
     let spec = builder.spec.clone();