diff --git a/tests/core/pyspec/eth2spec/test/phase0/unittests/fork_choice/test_on_tick.py b/tests/core/pyspec/eth2spec/test/phase0/unittests/fork_choice/test_on_tick.py
index 40606197e..0d9f6ddf5 100644
--- a/tests/core/pyspec/eth2spec/test/phase0/unittests/fork_choice/test_on_tick.py
+++ b/tests/core/pyspec/eth2spec/test/phase0/unittests/fork_choice/test_on_tick.py
@@ -46,7 +46,7 @@ def test_update_justified_single_on_store_finalized_chain(spec, state):
     store.block_states[block.hash_tree_root()] = state.copy()
     parent_block = block.copy()
     # To make compute_slots_since_epoch_start(current_slot) == 0, transition to the end of the epoch
-    slot = state.slot + spec.SLOTS_PER_EPOCH - (state.slot + spec.SLOTS_PER_EPOCH) % spec.SLOTS_PER_EPOCH - 1
+    slot = state.slot + spec.SLOTS_PER_EPOCH - state.slot % spec.SLOTS_PER_EPOCH - 1
     transition_to(spec, state, slot)
     # Create a block at the start of epoch 2
     block = build_empty_block_for_next_slot(spec, state)
@@ -100,7 +100,7 @@ def test_update_justified_single_not_on_store_finalized_chain(spec, state):
     store.block_states[block.hash_tree_root()] = state.copy()
     parent_block = block.copy()
     # To make compute_slots_since_epoch_start(current_slot) == 0, transition to the end of the epoch
-    slot = state.slot + spec.SLOTS_PER_EPOCH - (state.slot + spec.SLOTS_PER_EPOCH) % spec.SLOTS_PER_EPOCH - 1
+    slot = state.slot + spec.SLOTS_PER_EPOCH - state.slot % spec.SLOTS_PER_EPOCH - 1
     transition_to(spec, state, slot)
     # Create a block at the start of epoch 2
     block = build_empty_block_for_next_slot(spec, state)