diff --git a/PrebidMobile/PrebidMobileRendering/Prebid/PBMCore/Bid.swift b/PrebidMobile/PrebidMobileRendering/Prebid/PBMCore/Bid.swift
index 6b30ef9ab..8bcabb4f6 100644
--- a/PrebidMobile/PrebidMobileRendering/Prebid/PBMCore/Bid.swift
+++ b/PrebidMobile/PrebidMobileRendering/Prebid/PBMCore/Bid.swift
@@ -82,7 +82,7 @@ public class Bid: NSObject {
             return false
         }
         
-        var winningBidMarkers = ["hb_pb", "hb_bidder", "hb_size"]
+        var winningBidMarkers = ["hb_pb", "hb_bidder"]
         
         if Prebid.shared.useCacheForReportingWithRenderingAPI {
             winningBidMarkers.append("hb_cache_id")
diff --git a/PrebidMobileTests/RenderingTests/Tests/FakeDataFabricationHelpers/RawWinningBidFabricator.swift b/PrebidMobileTests/RenderingTests/Tests/FakeDataFabricationHelpers/RawWinningBidFabricator.swift
index ee05ba0a4..2a07c8e37 100644
--- a/PrebidMobileTests/RenderingTests/Tests/FakeDataFabricationHelpers/RawWinningBidFabricator.swift
+++ b/PrebidMobileTests/RenderingTests/Tests/FakeDataFabricationHelpers/RawWinningBidFabricator.swift
@@ -16,22 +16,25 @@
 import Foundation
 
 public class RawWinningBidFabricator {
-    static func makeRawWinningBid(price: Double, bidder: String?, cacheID: String?) -> PBMORTBBid<PBMORTBBidExt> {
+    static func makeRawWinningBid(price: Double?, bidder: String?, cacheID: String?) -> PBMORTBBid<PBMORTBBidExt> {
         let rawBid = PBMORTBBid<PBMORTBBidExt>()
-        rawBid.price = NSNumber(value: price)
         rawBid.ext = .init()
         rawBid.ext.prebid = .init()
-        rawBid.ext.prebid?.targeting = [
-            "hb_pb": "\(NSString(format: "%4.2f", price))",
-            "hb_size": "300x250"
-        ]
+      
+        if let price = price {
+            rawBid.price = NSNumber(value: price)
+            
+            rawBid.ext.prebid?.targeting = [
+                "hb_pb": "\(NSString(format: "%4.2f", price))"
+            ]
+        }
         
-        rawBid.ext.prebid?.targeting!["hb_bidder"] = bidder
-        rawBid.ext.prebid?.targeting!["hb_cache_id"] = cacheID
+        rawBid.ext.prebid?.targeting?["hb_bidder"] = bidder
+        rawBid.ext.prebid?.targeting?["hb_cache_id"] = cacheID
         return rawBid
     }
     
-    static func makeWinningBid(price: Double, bidder: String?, cacheID: String?) -> Bid {
+    static func makeWinningBid(price: Double?, bidder: String?, cacheID: String?) -> Bid {
         let rawBid = makeRawWinningBid(price: price, bidder: bidder, cacheID: cacheID)
         
         return Bid(bid: rawBid)
diff --git a/PrebidMobileTests/RenderingTests/Tests/Prebid/BidTest.swift b/PrebidMobileTests/RenderingTests/Tests/Prebid/BidTest.swift
index b2b48c4ad..c8d1dbc75 100644
--- a/PrebidMobileTests/RenderingTests/Tests/Prebid/BidTest.swift
+++ b/PrebidMobileTests/RenderingTests/Tests/Prebid/BidTest.swift
@@ -24,20 +24,49 @@ class BidTest: XCTestCase {
         
         Prebid.reset()
     }
+    
+    func testWinningBidMarkers_hb_pb_noWinningBid() {
+        let bid = RawWinningBidFabricator.makeWinningBid(price: nil, bidder: "some bidder", cacheID: nil)
+        XCTAssertFalse(bid.isWinning)
+    }
+    
+    func testWinningBidMarkers_hb_bidder_noWinningBid() {
+        let bid = RawWinningBidFabricator.makeWinningBid(price: 0.75, bidder: nil, cacheID: nil)
+        XCTAssertFalse(bid.isWinning)
+    }
 
     // Rendering API doesn't require cache id by default.
     // But publisher can set useCacheForReportingWithRenderingAPI to true
     // in order to add hb_cache_id to winning bid markers.
-    func testWinningBidRendering() {
-        let rawBid = RawWinningBidFabricator.makeRawWinningBid(price: 0.75, bidder: "some bidder", cacheID: nil)
-        let bid = Bid(bid: rawBid)
+    func testWinningBid_without_hb_cache_id() {
+        let bid = RawWinningBidFabricator.makeWinningBid(price: 0.75, bidder: "some bidder", cacheID: nil)
         XCTAssertTrue(bid.isWinning)
     }
     
-    func testNoWinningBidRendering() {
+    func testNoWinningBid_hb_cache_id() {
+        Prebid.shared.useCacheForReportingWithRenderingAPI = true
+        let bid = RawWinningBidFabricator.makeWinningBid(price: 0.75, bidder: "some bidder", cacheID: nil)
+        XCTAssertFalse(bid.isWinning)
+    }
+    
+    func testWinningBid_with_hb_cache_id() {
         Prebid.shared.useCacheForReportingWithRenderingAPI = true
-        let rawBid = RawWinningBidFabricator.makeRawWinningBid(price: 0.75, bidder: "some bidder", cacheID: nil)
-        let bid = Bid(bid: rawBid)
+        let bid = RawWinningBidFabricator.makeWinningBid(price: 0.75, bidder: "some bidder", cacheID: "cache/id")
+        XCTAssertTrue(bid.isWinning)
+    }
+    
+    // No hb_cache_id = no winning bid in Original API
+    func testWinningBidMarkers_NoWinningBid_OriginalApi() {
+        let _ = AdUnit(configId: "configID", size: CGSize(width: 300, height: 250))
+        
+        let bid = RawWinningBidFabricator.makeWinningBid(price: 0.75, bidder: "some bidder", cacheID: nil)
         XCTAssertFalse(bid.isWinning)
     }
+    
+    func testWinningBidMarkers_WinningBid_OriginalApi() {
+        let _ = AdUnit(configId: "configID", size: CGSize(width: 300, height: 250))
+        
+        let bid = RawWinningBidFabricator.makeWinningBid(price: 0.75, bidder: "some bidder", cacheID: "cache/id")
+        XCTAssertTrue(bid.isWinning)
+    }
 }