diff --git a/packages/cli/test/utils/simulation/assertions/defaults/headAssertion.ts b/packages/cli/test/utils/simulation/assertions/defaults/headAssertion.ts
index 8bbc279b7815..8d493637d228 100644
--- a/packages/cli/test/utils/simulation/assertions/defaults/headAssertion.ts
+++ b/packages/cli/test/utils/simulation/assertions/defaults/headAssertion.ts
@@ -48,7 +48,7 @@ export const headAssertion: SimulationAssertion<"head", HeadSummary> = {
      */
     const result = [`Slot,${nodes.map((n) => n.beacon.id).join(", ")}`];
     for (let s = 1; s <= slot; s++) {
-      result.push(`${s}, ${nodes.map((n) => store[n.beacon.id][s] ?? "-").join(",")}`);
+      result.push(`${s}, ${nodes.map((n) => store[n.beacon.id][s].blockRoot ?? "-").join(",")}`);
     }
     return {"headAssertion.csv": result.join("\n")};
   },