diff --git a/crates/fidc-core/src/engine.rs b/crates/fidc-core/src/engine.rs
index 97410bd..42bb5bb 100644
--- a/crates/fidc-core/src/engine.rs
+++ b/crates/fidc-core/src/engine.rs
@@ -4211,34 +4211,6 @@ mod tests {
         }
     }
 
-    #[derive(Debug)]
-    struct AuctionBuyWhenDecisionDateStrategy {
-        decision_date: NaiveDate,
-    }
-
-    impl Strategy for AuctionBuyWhenDecisionDateStrategy {
-        fn name(&self) -> &str {
-            "auction_buy_when_decision_date"
-        }
-
-        fn open_auction(
-            &mut self,
-            ctx: &StrategyContext<'_>,
-        ) -> Result<StrategyDecision, super::BacktestError> {
-            if ctx.decision_date == self.decision_date && ctx.portfolio.position(SYMBOL).is_none() {
-                return Ok(StrategyDecision {
-                    order_intents: vec![OrderIntent::Shares {
-                        symbol: SYMBOL.to_string(),
-                        quantity: 100,
-                        reason: "auction_test_buy".to_string(),
-                    }],
-                    ..StrategyDecision::default()
-                });
-            }
-            Ok(StrategyDecision::default())
-        }
-    }
-
     #[derive(Debug)]
     struct ScheduledBuyStrategy {
         rule: ScheduleRule,
@@ -4943,8 +4915,9 @@ mod tests {
 
         let result = BacktestEngine::new(
             dataset,
-            AuctionBuyWhenDecisionDateStrategy {
-                decision_date: second,
+            ScheduledBuyStrategy {
+                rule: ScheduleRule::daily("daily_open_signal", ScheduleStage::OpenAuction),
+                expected_decision_date: second,
             },
             broker,
             config,