diff --git a/tests/contracts/testMarket.nim b/tests/contracts/testMarket.nim
index c817fed9..d47aaa9d 100644
--- a/tests/contracts/testMarket.nim
+++ b/tests/contracts/testMarket.nim
@@ -454,6 +454,7 @@ ethersuite "On-Chain Market":
   
   test "can query past SlotFilled events since given timestamp":
     await market.requestStorage(request)
+    await market.reserveSlot(request.id, 0.u256)
     await market.fillSlot(request.id, 0.u256, proof, request.ask.collateral)
     
     # The SlotFilled event will be included in the same block as
@@ -467,6 +468,8 @@ ethersuite "On-Chain Market":
     let (_, fromTime) =
       await ethProvider.blockNumberAndTimestamp(BlockTag.latest)
 
+    await market.reserveSlot(request.id, 1.u256)
+    await market.reserveSlot(request.id, 2.u256)
     await market.fillSlot(request.id, 1.u256, proof, request.ask.collateral)
     await market.fillSlot(request.id, 2.u256, proof, request.ask.collateral)
 
@@ -481,6 +484,9 @@ ethersuite "On-Chain Market":
   test "queryPastSlotFilledEvents returns empty sequence of events when " &
        "no SlotFilled events have occurred since given timestamp":
     await market.requestStorage(request)
+    await market.reserveSlot(request.id, 0.u256)
+    await market.reserveSlot(request.id, 1.u256)
+    await market.reserveSlot(request.id, 2.u256)
     await market.fillSlot(request.id, 0.u256, proof, request.ask.collateral)
     await market.fillSlot(request.id, 1.u256, proof, request.ask.collateral)
     await market.fillSlot(request.id, 2.u256, proof, request.ask.collateral)