diff --git a/librustzcash-wrapper/src/lib.rs b/librustzcash-wrapper/src/lib.rs
index a67eba0..c243aa2 100644
--- a/librustzcash-wrapper/src/lib.rs
+++ b/librustzcash-wrapper/src/lib.rs
@@ -1981,7 +1981,8 @@ pub extern "C" fn rust_wrapper_create_transaction(
                 if net {
                     let _mb = main_builder.add_sapling_output::<String>(ovk, recipient, val, memo);
                 } else {
-                    let _tb = test_builder.add_sapling_output::<String>(ovk, recipient, val, memo);
+                    let tb = test_builder.add_sapling_output::<String>(ovk, recipient, val, memo);
+                    println!("add sap: {:?}", tb);
                 }
             },
             4 => {