diff --git a/test/Spec.hs b/test/Spec.hs
index 0f10226..37a45c5 100644
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -922,7 +922,7 @@ main = do
         let sa = decodeSaplingAddress "ztestsapling188csdsvhdny25am8ume03qr2026hdy03zpg5pq7jmmfxtxtct0e93p0rg80yfxvynqd4gwlwft5"
         it "Try to decode a valid TestNet Sapling Address " $ do
           print sa
-          sa `shouldBe` Nothing
+          sa `shouldNotBe` Nothing
 
 
 -- | Properties