diff --git a/test_libs/pyspec/eth2spec/test/sanity/test_blocks.py b/test_libs/pyspec/eth2spec/test/sanity/test_blocks.py
index da6acb22c..ba577b89e 100644
--- a/test_libs/pyspec/eth2spec/test/sanity/test_blocks.py
+++ b/test_libs/pyspec/eth2spec/test/sanity/test_blocks.py
@@ -63,7 +63,7 @@ def test_empty_block_transition(spec, state):
 
     assert len(state.eth1_data_votes) == pre_eth1_votes + 1
     assert spec.get_block_root_at_slot(state, pre_slot) == block.parent_root
-    assert spec.get_randao_mix(state, spec.get_current_epoch(state)) != spec.Root()
+    assert spec.get_randao_mix(state, spec.get_current_epoch(state)) != spec.Bytes32()
 
 
 @with_all_phases