diff --git a/Sources/ZcashLightClientKit/Model/Proposal.swift b/Sources/ZcashLightClientKit/Model/Proposal.swift
index 0111c588..fac1c62d 100644
--- a/Sources/ZcashLightClientKit/Model/Proposal.swift
+++ b/Sources/ZcashLightClientKit/Model/Proposal.swift
@@ -8,11 +8,24 @@
 import Foundation
 
 /// A data structure that describes a series of transactions to be created.
-public struct Proposal {
+public struct Proposal: Equatable {
     let inner: FfiProposal
 
     /// Returns the total fee to be paid across all proposed transactions, in zatoshis.
     public func totalFeeRequired() -> Zatoshi {
-        return Zatoshi(Int64(inner.balance.feeRequired))
+        Zatoshi(Int64(inner.balance.feeRequired))
+    }
+}
+
+public extension Proposal {
+    /// IMPORTANT: Use of this function is for testing purposes only, not recommended to use in production.
+    /// The instance of `Proposal` should never be created on client's side.
+    static func testOnlyFakeProposal(totalFee: UInt64) -> Self {
+        var ffiProposal = FfiProposal()
+        var balance = FfiTransactionBalance()
+        
+        balance.feeRequired = totalFee
+        
+        return Self(inner: ffiProposal)
     }
 }
diff --git a/Sources/ZcashLightClientKit/Rust/ZcashRustBackend.swift b/Sources/ZcashLightClientKit/Rust/ZcashRustBackend.swift
index 99d128a6..290bce63 100644
--- a/Sources/ZcashLightClientKit/Rust/ZcashRustBackend.swift
+++ b/Sources/ZcashLightClientKit/Rust/ZcashRustBackend.swift
@@ -13,7 +13,7 @@ let globalDBLock = NSLock()
 
 actor ZcashRustBackend: ZcashRustBackendWelding {
     let minimumConfirmations: UInt32 = 10
-    let useZIP317Fees = false
+    let useZIP317Fees = true
 
     let dbData: (String, UInt)
     let fsBlockDbRoot: (String, UInt)