diff --git a/hspec-golden-aeson.cabal b/hspec-golden-aeson.cabal
--- a/hspec-golden-aeson.cabal
+++ b/hspec-golden-aeson.cabal
@@ -1,9 +1,11 @@
--- This file has been generated from package.yaml by hpack version 0.17.1.
+-- This file has been generated from package.yaml by hpack version 0.28.2.
 --
 -- see: https://github.com/sol/hpack
+--
+-- hash: fd3131a3ad56f72d492984264b8e7c4a6a6fadd8afc71dac6295c5758fdcf4ce
 
 name:           hspec-golden-aeson
-version:        0.5.1.0
+version:        0.6.0.0
 synopsis:       Use tests to monitor changes in Aeson serialization
 description:    Use tests to monitor changes in Aeson serialization
 category:       Testing
@@ -26,16 +28,16 @@
       src
   ghc-options: -Wall
   build-depends:
-      base >= 4.7 && < 5
+      QuickCheck
     , aeson
     , aeson-pretty
+    , base >=4.7 && <5
     , bytestring
     , directory
     , filepath
     , hspec
+    , quickcheck-arbitrary-adt >=0.3.0.0
     , random
-    , quickcheck-arbitrary-adt >= 0.3.0.0
-    , QuickCheck
     , transformers
   exposed-modules:
       Test.Aeson.GenericSpecs
@@ -56,15 +58,15 @@
       test
   ghc-options: -Wall
   build-depends:
-      base
+      QuickCheck
     , aeson
+    , base
     , directory
     , hspec
     , hspec-core
     , hspec-golden-aeson
-    , silently
     , quickcheck-arbitrary-adt
-    , QuickCheck
+    , silently
     , transformers
   other-modules:
       Test.Aeson.GenericSpecsSpec
@@ -74,4 +76,5 @@
       Test.Types.MismatchedToAndFromSerialization
       Test.Types.NewSelector
       Test.Utils
+      Paths_hspec_golden_aeson
   default-language: Haskell2010
diff --git a/src/Test/Aeson/Internal/ADT/GoldenSpecs.hs b/src/Test/Aeson/Internal/ADT/GoldenSpecs.hs
--- a/src/Test/Aeson/Internal/ADT/GoldenSpecs.hs
+++ b/src/Test/Aeson/Internal/ADT/GoldenSpecs.hs
@@ -96,11 +96,12 @@
   sampleSize <- readSampleSize =<< readFile goldenFile
   newSamples <- mkRandomADTSamplesForConstructor sampleSize (Proxy :: Proxy a) (capConstructor cap) goldenSeed
   whenFails (writeComparisonFile newSamples) $ do
+    goldenBytes <- readFile goldenFile
     goldenSamples :: RandomSamples a <-
-      either (throwIO . ErrorCall) return =<<
-      A.eitherDecode' <$>
-      readFile goldenFile
+      either (throwIO . ErrorCall) return $
+      A.eitherDecode' goldenBytes
     newSamples `shouldBe` goldenSamples
+    encodePretty newSamples `shouldBe` goldenBytes
   where
     whenFails :: forall b c. IO c -> IO b -> IO b
     whenFails = flip onException
diff --git a/test/Test/Aeson/GenericSpecsSpec.hs b/test/Test/Aeson/GenericSpecsSpec.hs
--- a/test/Test/Aeson/GenericSpecsSpec.hs
+++ b/test/Test/Aeson/GenericSpecsSpec.hs
@@ -171,6 +171,50 @@
       (s1,_) <- hspecSilently $ goldenADTSpecs defaultSettings (Proxy :: Proxy TAS.Person)
       summaryFailures s1 `shouldBe` 1
 
+    it "encoding change should fail test" $ do
+      -- clean up previously existing golden folder
+      bg <- doesDirectoryExist "golden"
+      if bg
+        then removeDirectoryRecursive "golden"
+        else return ()
+
+      -- manually create golden file which appends `.0` to all ages.
+      -- write as inline text to make test case clearer
+      let
+        goldenTweaked = "{\
+\    \"seed\": -558805430132139320,\
+\    \"samples\": [\
+\        {\
+\            \"age\": -24.0,\
+\            \"name\": \"<\147\158\\u000e\251\133]V_t\167\&2\210\148\194Q\196_\150\145\\u0017Hf&\"\
+\        },\
+\        {\
+\            \"age\": -9.0,\
+\            \"name\": \"<\\n\\u0018O\\n>\"\
+\        },\
+\        {\
+\            \"age\": -1.0,\
+\            \"name\": \"m0x\217\\u000c\\u000fg4\188\197\\u000bF\227\\u0013\\u00042F\\u001f\176%`\224Iw\\u0011\231/\204\"\
+\        },\
+\        {\
+\            \"age\": -22.0,\
+\            \"name\": \"x\221\250{\\u001bG\244\\u0012\232\\u0004)\"\
+\        },\
+\        {\
+\            \"age\": 26.0,\
+\            \"name\": \"\153\\u0005n\\u001a$q27\184=\\u0012ba\\u001b\\u0010\252]\242A.\139w\234\&0\239\\u0004\204\"\
+\        }\
+\    ]\
+\}"
+
+      createDirectoryIfMissing True "golden/Person"
+      writeFile "golden/Person/Person.json" goldenTweaked
+
+      -- Aeson can decode "10.0" as `10 :: Int` but it will encode `10 :: Int` as 10
+      -- This should cause the golden test to fail since it indicates a change in encoding
+      (s1,_) <- hspecSilently $ goldenADTSpecs defaultSettings (Proxy :: Proxy T.Person)
+      summaryFailures s1 `shouldBe` 1
+
   describe "mkGoldenFileForType" $ do
     it "create a single file in a dir for a Product type" $ do
       -- clean up previously existing golden folder
diff --git a/test/Test/Types/BrokenSerialization.hs b/test/Test/Types/BrokenSerialization.hs
--- a/test/Test/Types/BrokenSerialization.hs
+++ b/test/Test/Types/BrokenSerialization.hs
@@ -13,9 +13,9 @@
 } deriving (Eq,Show,Generic)
 
 instance ToJSON Person where
-  toJSON (Person name age) = object [
-       "personName" .= name
-    ,  "personAge"  .= age
+  toJSON (Person name' age') = object [
+       "personName" .= name'
+    ,  "personAge"  .= age'
     ]
 instance FromJSON Person where
   parseJSON = withObject "Expected a Person object" $ \o ->
diff --git a/test/Test/Types/MismatchedToAndFromSerialization.hs b/test/Test/Types/MismatchedToAndFromSerialization.hs
--- a/test/Test/Types/MismatchedToAndFromSerialization.hs
+++ b/test/Test/Types/MismatchedToAndFromSerialization.hs
@@ -14,9 +14,9 @@
 
 -- ToJSON and FromJSON use different strings, this should break.
 instance ToJSON Person where
-  toJSON (Person name age) = object [
-       "personName" .= name
-    ,  "personAge"  .= age
+  toJSON (Person name' age') = object [
+       "personName" .= name'
+    ,  "personAge"  .= age'
     ]
 
 instance FromJSON Person where