diff --git a/tests/core/pyspec/eth2spec/test/phase0/unittests/validator/test_validator_unittest.py b/tests/core/pyspec/eth2spec/test/phase0/unittests/validator/test_validator_unittest.py
index 918ab96e2..f5f417bba 100644
--- a/tests/core/pyspec/eth2spec/test/phase0/unittests/validator/test_validator_unittest.py
+++ b/tests/core/pyspec/eth2spec/test/phase0/unittests/validator/test_validator_unittest.py
@@ -485,7 +485,7 @@ def test_get_aggregate_and_proof_signature(spec, state):
 
 
 def run_compute_subscribed_subnets_arguments(spec, rng=random.Random(1111)):
-    node_id = rng.randint(0, 2**40 - 1)  # try VALIDATOR_REGISTRY_LIMIT
+    node_id = rng.randint(0, 2**256 - 1)
     epoch = rng.randint(0, 2**64 - 1)
     subnets = spec.compute_subscribed_subnets(node_id, epoch)
     assert len(subnets) == spec.config.SUBNETS_PER_NODE