diff --git a/src/test/groovy/org/prebid/server/functional/tests/AuctionSpec.groovy b/src/test/groovy/org/prebid/server/functional/tests/AuctionSpec.groovy
index e5e9649d82b..a9bc17dfe1d 100644
--- a/src/test/groovy/org/prebid/server/functional/tests/AuctionSpec.groovy
+++ b/src/test/groovy/org/prebid/server/functional/tests/AuctionSpec.groovy
@@ -650,7 +650,7 @@ class AuctionSpec extends BaseSpec {
         }
 
         and: "Default bid response"
-        def originalBidId = PBSUtils.getRandomString(PBSUtils.getRandomNumber(0, MIN_BID_ID_LENGTH))
+        def originalBidId = PBSUtils.getRandomString(PBSUtils.getRandomNumber(1, MIN_BID_ID_LENGTH))
         def bidResponse = BidResponse.getDefaultBidResponse(bidRequest).tap {
             seatbid.first.bid.first.id = originalBidId
         }