diff --git a/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks_random.py b/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks_random.py
index 98b251add..05ae545b8 100644
--- a/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks_random.py
+++ b/tests/core/pyspec/eth2spec/test/phase0/sanity/test_blocks_random.py
@@ -1,8 +1,9 @@
 import itertools
 import warnings
 from random import Random
+from tests.core.pyspec.eth2spec.test.helpers.constants import PHASE0, ALTAIR
 from typing import Callable
-from tests.core.pyspec.eth2spec.test.context import misc_balances_in_default_range, zero_activation_threshold
+from tests.core.pyspec.eth2spec.test.context import misc_balances_in_default_range, with_phases, zero_activation_threshold
 from eth2spec.test.helpers.multi_operations import (
     build_random_block_from_state,
 )
@@ -315,7 +316,7 @@ def _iter_temporal(spec, callable_or_int):
 
 
 @pytest_generate_tests_adapter
-@with_all_phases
+@with_phases([PHASE0, ALTAIR])
 @with_custom_state(balances_fn=misc_balances_in_default_range, threshold_fn=zero_activation_threshold)
 @spec_test
 @single_phase