diff --git a/tests/unit/test_gate_prefix.py b/tests/unit/test_gate_prefix.py
index 8b6749b..ac72a07 100644
--- a/tests/unit/test_gate_prefix.py
+++ b/tests/unit/test_gate_prefix.py
@@ -156,9 +156,26 @@ def test_frozen_run_call_is_noop() -> None:
         run.slots[i].cand_per_q = {f"q{i}": True}
     _advance_prefix(run, _PARAMS)
     assert run.frozen and run.n_used == 7
-    n_evidence = len(run.evidence_rows)
+    before = (
+        run.w,
+        run.l,
+        run.n_used,
+        run.prefix_ptr,
+        len(run.evidence_rows),
+        run.verdict,
+        run.frozen,
+    )
     _advance_prefix(run, _PARAMS)
-    assert run.n_used == 7 and len(run.evidence_rows) == n_evidence
+    after = (
+        run.w,
+        run.l,
+        run.n_used,
+        run.prefix_ptr,
+        len(run.evidence_rows),
+        run.verdict,
+        run.frozen,
+    )
+    assert after == before
 
 
 def test_ties_hit_futility_early_and_freeze() -> None: