diff --git a/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift b/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift
index 5ec1ae2ef5..b71a2761e1 100644
--- a/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift
+++ b/Sources/Purchasing/StoreKitAbstractions/PromotionalOffer.swift
@@ -122,11 +122,20 @@ extension PromotionalOffer.SignedData {
 
     @available(iOS 15.0, tvOS 15.0, watchOS 8.0, macOS 12.0, *)
     var sk2PurchaseOption: Product.PurchaseOption {
+        let signature: Data
+
+        if let decoded = Data(base64Encoded: self.signature) {
+            signature = decoded
+        } else {
+            // TODO: log warning
+            signature = .init()
+        }
+
         return .promotionalOffer(
             offerID: self.identifier,
             keyID: self.keyIdentifier,
             nonce: self.nonce,
-            signature: self.signature.asData,
+            signature: signature,
             timestamp: self.timestamp
         )
     }
diff --git a/Tests/BackendIntegrationTests/StoreKitIntegrationTests.swift b/Tests/BackendIntegrationTests/StoreKitIntegrationTests.swift
index 6fedc13517..718589face 100644
--- a/Tests/BackendIntegrationTests/StoreKitIntegrationTests.swift
+++ b/Tests/BackendIntegrationTests/StoreKitIntegrationTests.swift
@@ -377,8 +377,6 @@ class StoreKit1IntegrationTests: BaseBackendIntegrationTests {
     @available(iOS 15.2, tvOS 15.2, macOS 12.1, watchOS 8.3, *)
     func testPurchaseWithPromotionalOffer() async throws {
         try AvailabilityChecks.iOS15APIAvailableOrSkipTest()
-        try XCTSkipIf(Self.storeKit2Setting == .enabledForCompatibleDevices,
-                      "This test is not currently passing on SK2")
 
         let user = UUID().uuidString