diff --git a/CHANGELOG.md b/CHANGELOG.md
index 000aadf..15de7f4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changes
 
-## Version 1.0.0
+## Version 0.1.0.0
 
 _2024-12-17_
 
diff --git a/README.md b/README.md
index 98d7567..4560435 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,4 @@ A library providing additional golden test helpers for the
 the output of functions that return textual output and instances of @Show@,
 @ToJSON@ or @ToYAML@.
 
-To find out what's new, read the **[change log][]**.
-
-[change log]: https://github.com/bellroy/tasty-golden-extra/blob/master/CHANGELOG.md
+To find out what's new, read the [change log](https://github.com/bellroy/tasty-golden-extra/blob/master/CHANGELOG.md).
diff --git a/src/Test/Tasty/Golden/Extra/GoldenVsShow.hs b/src/Test/Tasty/Golden/Extra/GoldenVsShow.hs
index d4ca05d..a31f6d7 100644
--- a/src/Test/Tasty/Golden/Extra/GoldenVsShow.hs
+++ b/src/Test/Tasty/Golden/Extra/GoldenVsShow.hs
@@ -30,8 +30,8 @@ import Text.Show.Pretty (ppShow)
 --  import System.FilePath ((\</\>))
 --  import Test.Tasty.Golden.Extra.GoldenVsShow (GoldenVsShow (..))
 --
---  tasty_FromJSON_ToJSON :: GoldenVsShow
---  tasty_FromJSON_ToJSON =
+--  tasty_GoldenVsShow :: GoldenVsShow
+--  tasty_GoldenVsShow =
 --    GoldenVsShow (goldenFilesPath \</\> "Person.golden.txt") $
 --      Aeson.eitherDecodeFileStrict @Person (goldenFilesPath \</\> "Person.json")
 -- @
@@ -50,7 +50,7 @@ instance Discover.Tasty GoldenVsShow where
 --  import MySchemasWithShowAndShowInstances.Person (Person)
 --  import Data.Aeson qualified as Aeson
 --  import System.FilePath ((\</\>))
---  import Test.Tasty.Golden.Extra.GoldenVsShow (GoldenVsShow (..))
+--  import Test.Tasty.Golden.Extra.GoldenVsShow (goldenVsShow)
 --
 --  test_Show :: TestTree
 --  test_Show = do
@@ -58,7 +58,7 @@ instance Discover.Tasty GoldenVsShow where
 --    goldenVsShow
 --      "Test Show instance for Person"
 --      (goldenFilesPath \</\> "Person.golden.txt")
---      (Aeson.decodeFileStrict' inputFile)
+--      (Aeson.decodeFileStrict' @Person inputFile)
 -- @
 goldenVsShow ::
   (Show a) =>
diff --git a/src/Test/Tasty/Golden/Extra/GoldenVsString.hs b/src/Test/Tasty/Golden/Extra/GoldenVsString.hs
index 8bb84eb..424a075 100644
--- a/src/Test/Tasty/Golden/Extra/GoldenVsString.hs
+++ b/src/Test/Tasty/Golden/Extra/GoldenVsString.hs
@@ -8,7 +8,11 @@
 --
 -- These helpers are useful for creating golden tests for functions that
 -- produce textual output.
-module Test.Tasty.Golden.Extra.GoldenVsString (GoldenVsString (..)) where
+module Test.Tasty.Golden.Extra.GoldenVsString
+  ( GoldenVsString (..),
+    goldenVsString,
+  )
+where
 
 import Data.ByteString.Lazy (ByteString)
 import Test.Tasty.Discover qualified as Discover
@@ -20,9 +24,8 @@ import Test.Tasty.Golden
 -- Example use:
 --
 -- @
---  import MySchemasWithShowAndToJSONInstances.Person (Person, convertToCSVText)
+--  import MySchemasWithShowAndToJSONInstances.Person (convertToCSVText)
 --  import Data.Aeson qualified as Aeson
---  import Data.Aeson.Encode.Pretty qualified as AesonPretty
 --  import System.FilePath ((\</\>))
 --  import Test.Tasty.Golden.Extra.GoldenVsString (GoldenVsString (..))
 --
diff --git a/src/Test/Tasty/Golden/Extra/GoldenVsToJSON.hs b/src/Test/Tasty/Golden/Extra/GoldenVsToJSON.hs
index 8dea13c..e288998 100644
--- a/src/Test/Tasty/Golden/Extra/GoldenVsToJSON.hs
+++ b/src/Test/Tasty/Golden/Extra/GoldenVsToJSON.hs
@@ -9,7 +9,6 @@
 -- These helpers are useful for creating golden tests for @ToJSON@ instances.
 module Test.Tasty.Golden.Extra.GoldenVsToJSON
   ( GoldenVsToJSON (..),
-    goldenVsToJsonFile,
     goldenVsToJson,
   )
 where
@@ -20,7 +19,7 @@ import Data.ByteString.Lazy qualified as BL
 import Test.Tasty (TestName, TestTree)
 import Test.Tasty.Discover qualified as Discover
 import Test.Tasty.Golden.Advanced (goldenTest)
-import Test.Tasty.Golden.Extra.Internal (assertJsonEqual)
+import Test.Tasty.Golden.Extra.Internal (checkJsonDifference, maybeDifference)
 
 -- | Tasty-discoverable type for creating golden tests for @ToJSON@ instances.
 --
@@ -42,43 +41,6 @@ data GoldenVsToJSON = forall a. (Aeson.ToJSON a) => GoldenVsToJSON FilePath (IO
 instance Discover.Tasty GoldenVsToJSON where
   tasty info (GoldenVsToJSON ref act) = pure $ goldenVsToJson (Discover.nameOf info) ref act
 
--- | Helper function for creating a @TestTree@ for @ToJSON@ golden tests.
--- Use when you want to test code that produces a JSON file as a side effect.
---
--- Example use:
---
--- @
---  import MySchemasWithToJSONInstances.Person (Person, gen)
---  import Data.Aeson qualified as Aeson
---  import System.FilePath ((\</\>))
---  import Test.Tasty.Golden.Extra.GoldenVsToJSON (GoldenVsToJSON (..))
---
---  test_ToJSON :: TestTree
---  test_ToJSON = do
---    person <- gen
---    let outputFile = goldenFilesPath \</\> "Person.json"
---    goldenVsToJSONFile
---      "Test ToJSON instance for Person"
---      (goldenFilesPath \</\> "Person.golden.json")
---      outputFile
---      (Aeson.encodeFile outputFile person)
--- @
-goldenVsToJsonFile ::
-  -- | test name
-  TestName ->
-  -- | path to the «golden» file (the file that contains correct output)
-  FilePath ->
-  -- | path to the output file
-  FilePath ->
-  -- | action that creates the output file
-  IO () ->
-  TestTree
-goldenVsToJsonFile name ref new act =
-  goldenVsToJson @Aeson.Value name ref $ do
-    act
-    eJson <- Aeson.decodeFileStrict new
-    orFailTest ("Couldn't decode JSON file: " <> new) eJson
-
 -- | Helper function for creating a @TestTree@ for @ToJSON@ golden tests.
 -- Use when you want to test @ToJSON@ instances against a golden example on disk.
 --
@@ -88,7 +50,7 @@ goldenVsToJsonFile name ref new act =
 --  import MySchemasWithToJSONInstances.Person (Person)
 --  import Data.Aeson qualified as Aeson
 --  import System.FilePath ((\</\>))
---  import Test.Tasty.Golden.Extra.GoldenVsToJSON (GoldenVsToJSON (..))
+--  import Test.Tasty.Golden.Extra.GoldenVsToJSON (goldenVsToJSON)
 --
 --  test_ToJSON :: TestTree
 --  test_ToJSON = do
@@ -96,7 +58,7 @@ goldenVsToJsonFile name ref new act =
 --    goldenVsToJSON
 --      "Test ToJSON instance for Person"
 --      (goldenFilesPath \</\> "Person.golden.json")
---      (Aeson.decodeFileStrict' inputFile)
+--      (Aeson.decodeFileStrict' @Person inputFile)
 -- @
 goldenVsToJson ::
   forall a.
@@ -114,7 +76,7 @@ goldenVsToJson name fp act =
     name
     (Aeson.decodeFileStrict fp >>= orFailTest ("Couldn't decode golden JSON file:" <> fp))
     (Aeson.toJSON <$> act)
-    assertJsonEqual
+    (\a b -> pure . maybeDifference $ checkJsonDifference a b)
     (BL.writeFile fp . encodePretty)
 
 orFailTest :: String -> Maybe a -> IO a
diff --git a/src/Test/Tasty/Golden/Extra/GoldenVsToYAML.hs b/src/Test/Tasty/Golden/Extra/GoldenVsToYAML.hs
index 9d7476f..4977140 100644
--- a/src/Test/Tasty/Golden/Extra/GoldenVsToYAML.hs
+++ b/src/Test/Tasty/Golden/Extra/GoldenVsToYAML.hs
@@ -16,7 +16,6 @@
 -- that you want to convert to YAML using the @Data.Yaml@ package.
 module Test.Tasty.Golden.Extra.GoldenVsToYAML
   ( goldenVsToYaml,
-    goldenVsToYamlFile,
     GoldenVsToYAML (..),
   )
 where
@@ -29,7 +28,7 @@ import Data.Yaml qualified as Yaml
 import Test.Tasty
 import Test.Tasty.Discover qualified as Discover
 import Test.Tasty.Golden.Advanced (goldenTest)
-import Test.Tasty.Golden.Extra.Internal (assertJsonEqual)
+import Test.Tasty.Golden.Extra.Internal (checkJsonDifference, maybeDifference)
 
 -- | Tasty-discoverable type for creating golden tests for @ToJSON@ instances,
 -- that you want to convert to YAML using the @Data.Yaml@ package.
@@ -42,8 +41,8 @@ import Test.Tasty.Golden.Extra.Internal (assertJsonEqual)
 --  import System.FilePath ((\</\>))
 --  import Test.Tasty.Golden.Extra.GoldenVsToYAML (GoldenVsToYAML (..))
 --
---  tasty_FromJSON_ToJSON :: GoldenVsToYAML
---  tasty_FromJSON_ToJSON =
+--  tasty_FromJSON_ToYAML :: GoldenVsToYAML
+--  tasty_FromJSON_ToYAML =
 --    GoldenVsToYAML (goldenFilesPath \</\> "Person.golden.yaml") $
 --      Aeson.eitherDecodeFileStrict @Person (goldenFilesPath \</\> "Person.json")
 -- @
@@ -52,43 +51,6 @@ data GoldenVsToYAML = forall a. (Aeson.ToJSON a) => GoldenVsToYAML FilePath (IO
 instance Discover.Tasty GoldenVsToYAML where
   tasty info (GoldenVsToYAML ref act) = pure $ goldenVsToYaml (Discover.nameOf info) ref act
 
--- | Helper function for creating a @TestTree@ for @ToJSON@-to-YAML golden tests.
--- Use when you want to test code that produces a YAML file as a side effect.
---
--- Example use:
---
--- @
---  import MySchemasWithToJSONInstances.Person (Person, gen)
---  import Data.Aeson qualified as Aeson
---  import System.FilePath ((\</\>))
---  import Test.Tasty.Golden.Extra.GoldenVsToYAML (GoldenVsToYAML (..))
---
---  test_ToYAML :: TestTree
---  test_ToYAML = do
---    person <- gen
---    let outputFile = goldenFilesPath \</\> "Person.yaml"
---    goldenVsToYamlFile
---      "Test YAML serialization for Person"
---      (goldenFilesPath \</\> "Person.golden.yaml")
---      outputFile
---      (Aeson.encodeFile outputFile person)
--- @
-goldenVsToYamlFile ::
-  -- | test name
-  TestName ->
-  -- | path to the «golden» file (the file that contains correct output)
-  FilePath ->
-  -- | path to the output file
-  FilePath ->
-  -- | action that creates the output file
-  IO () ->
-  TestTree
-goldenVsToYamlFile name ref new act =
-  goldenVsToYaml @Aeson.Value name ref $ do
-    act
-    eJson <- Yaml.decodeFileEither new
-    orFailTest new eJson
-
 -- | Helper function for creating a @TestTree@ for @ToJSON@-to-YAML golden tests.
 -- Use when you want to test @ToJSON@ instances against a golden example of YAML
 -- on disk.
@@ -99,7 +61,7 @@ goldenVsToYamlFile name ref new act =
 --  import MySchemasWithToJSONInstances.Person (Person)
 --  import Data.Aeson qualified as Aeson
 --  import System.FilePath ((\</\>))
---  import Test.Tasty.Golden.Extra.GoldenVsToYAML (GoldenVsToYAML (..))
+--  import Test.Tasty.Golden.Extra.GoldenVsToYAML (goldenVsToYAML)
 --
 --  test_ToYAML :: TestTree
 --  test_ToYAML = do
@@ -107,7 +69,7 @@ goldenVsToYamlFile name ref new act =
 --    goldenVsToYAML
 --      "Test YAML serialization for Person"
 --      (goldenFilesPath \</\> "Person.golden.yaml")
---      (Aeson.decodeFileStrict' inputFile)
+--      (Aeson.decodeFileStrict' @Person inputFile)
 -- @
 goldenVsToYaml ::
   forall a.
@@ -125,7 +87,7 @@ goldenVsToYaml name fp act =
     name
     (Yaml.decodeFileEither fp >>= orFailTest fp)
     (Aeson.toJSON <$> act)
-    assertJsonEqual
+    (\a b -> pure . maybeDifference $ checkJsonDifference a b)
     (BL.writeFile fp . Yaml.encode)
 
 orFailTest :: FilePath -> Either Yaml.ParseException a -> IO a
diff --git a/src/Test/Tasty/Golden/Extra/Internal.hs b/src/Test/Tasty/Golden/Extra/Internal.hs
index 9e17d09..d1fbc80 100644
--- a/src/Test/Tasty/Golden/Extra/Internal.hs
+++ b/src/Test/Tasty/Golden/Extra/Internal.hs
@@ -1,5 +1,16 @@
+-- |
+--
+-- Module      : Test.Tasty.Golden.Extra.Internal
+-- Copyright   : (C) 2024 Bellroy Pty Ltd
+-- License     : BSD-3-Clause
+-- Maintainer  : Bellroy Tech Team <haskell@bellroy.com>
+-- Stability   : experimental
+--
+-- Common types and functions  used by the other modules in `tasty-golden-extra`.
 module Test.Tasty.Golden.Extra.Internal
-  ( assertJsonEqual,
+  ( checkJsonDifference,
+    maybeDifference,
+    JsonDifference (..),
   )
 where
 
@@ -9,8 +20,26 @@ import Data.Aeson.Patch (patchOperations)
 import Data.Text.Lazy qualified as TL
 import Text.Pretty.Simple (pShowNoColor)
 
-assertJsonEqual :: Aeson.Value -> Aeson.Value -> IO (Maybe String)
-assertJsonEqual goldenJson actualJson =
-  pure $ case patchOperations $ diff goldenJson actualJson of
-    [] -> Nothing
-    ds -> Just $ "Files contain different JSON values: " <> TL.unpack (pShowNoColor ds)
+-- | Represents the result of comparing two JSON values - either the JSON is
+-- identical, or there are differences and you are given an error message
+-- containing the differences.
+data JsonDifference
+  = JsonIdentical
+  | JsonDifferent String
+
+-- | Convert a `JsonDifference` to a `Maybe String` containing the error message.
+maybeDifference :: JsonDifference -> Maybe String
+maybeDifference JsonIdentical = Nothing
+maybeDifference (JsonDifferent diffString) = Just diffString
+
+-- | Compare two JSON values and return a `JsonDifference` representing the result.
+checkJsonDifference ::
+  Aeson.Value ->
+  Aeson.Value ->
+  JsonDifference
+checkJsonDifference goldenJson actualJson =
+  case patchOperations $ diff goldenJson actualJson of
+    [] -> JsonIdentical
+    ds ->
+      JsonDifferent $
+        "Files contain different JSON values:\n" <> TL.unpack (pShowNoColor ds)
diff --git a/tasty-golden-extra.cabal b/tasty-golden-extra.cabal
index be23416..20e516e 100644
--- a/tasty-golden-extra.cabal
+++ b/tasty-golden-extra.cabal
@@ -63,11 +63,10 @@ library
   ghc-options:     -Wunused-packages
   hs-source-dirs:  src
 
-  -- cabal-fmt: expand src/ -Test.Tasty.Golden.Extra.Internal
+  -- cabal-fmt: expand src/
   exposed-modules:
     Test.Tasty.Golden.Extra.GoldenVsShow
     Test.Tasty.Golden.Extra.GoldenVsString
     Test.Tasty.Golden.Extra.GoldenVsToJSON
     Test.Tasty.Golden.Extra.GoldenVsToYAML
-
-  other-modules:   Test.Tasty.Golden.Extra.Internal
+    Test.Tasty.Golden.Extra.Internal