diff --git a/tests/core/pyspec/eth2spec/test/deneb/fork_choice/test_on_block.py b/tests/core/pyspec/eth2spec/test/deneb/fork_choice/test_on_block.py
index f8ffa6234..83f7346e3 100644
--- a/tests/core/pyspec/eth2spec/test/deneb/fork_choice/test_on_block.py
+++ b/tests/core/pyspec/eth2spec/test/deneb/fork_choice/test_on_block.py
@@ -2,9 +2,11 @@ from random import Random
 
 from eth2spec.test.context import (
     spec_state_test,
-    with_deneb_and_later,
+    with_phases,
 )
 
+from eth2spec.test.helpers.constants import DENEB
+
 from eth2spec.test.helpers.block import (
     build_empty_block_for_next_slot,
 )
@@ -34,7 +36,7 @@ def get_block_with_blob(spec, state, rng=None):
     return block, blobs, blob_kzg_proofs
 
 
-@with_deneb_and_later
+@with_phases([DENEB])
 @spec_state_test
 def test_simple_blob_data(spec, state):
     rng = Random(1234)
@@ -69,7 +71,7 @@ def test_simple_blob_data(spec, state):
     yield 'steps', test_steps
 
 
-@with_deneb_and_later
+@with_phases([DENEB])
 @spec_state_test
 def test_invalid_incorrect_proof(spec, state):
     rng = Random(1234)
@@ -97,7 +99,7 @@ def test_invalid_incorrect_proof(spec, state):
     yield 'steps', test_steps
 
 
-@with_deneb_and_later
+@with_phases([DENEB])
 @spec_state_test
 def test_invalid_data_unavailable(spec, state):
     rng = Random(1234)
@@ -125,7 +127,7 @@ def test_invalid_data_unavailable(spec, state):
     yield 'steps', test_steps
 
 
-@with_deneb_and_later
+@with_phases([DENEB])
 @spec_state_test
 def test_invalid_wrong_proofs_length(spec, state):
     rng = Random(1234)
@@ -153,7 +155,7 @@ def test_invalid_wrong_proofs_length(spec, state):
     yield 'steps', test_steps
 
 
-@with_deneb_and_later
+@with_phases([DENEB])
 @spec_state_test
 def test_invalid_wrong_blobs_length(spec, state):
     rng = Random(1234)
@@ -178,4 +180,4 @@ def test_invalid_wrong_blobs_length(spec, state):
 
     assert spec.get_head(store) != signed_block.message.hash_tree_root()
 
-    yield 'steps', test_steps
+    yield 'steps', test_steps
\ No newline at end of file