diff --git a/crates/fidc-core/src/signal_contract.rs b/crates/fidc-core/src/signal_contract.rs
index 445769a..6080117 100644
--- a/crates/fidc-core/src/signal_contract.rs
+++ b/crates/fidc-core/src/signal_contract.rs
@@ -403,7 +403,10 @@ mod tests {
     }
 
     fn at_context<T>(at: Option<NaiveDateTime>, action: impl FnOnce(&StrategyContext<'_>) -> T) -> T {
-        let data = crate::DataSet::from_components(vec![], vec![], vec![], vec![], vec![]).unwrap();
+        let data = crate::DataSet::from_components(vec![], vec![], vec![], vec![], vec![crate::BenchmarkSnapshot {
+            date:NaiveDate::from_ymd_opt(2025,1,6).unwrap(), benchmark:"clock-fixture".into(),
+            open:100.0, close:100.0, prev_close:100.0, volume:1,
+        }]).unwrap();
         let portfolio = PortfolioState::new(10_000.0);
         let symbols = BTreeSet::new();
         action(&StrategyContext {