diff --git a/src-libinterfacetests/Main.hs b/src-libinterfacetests/Main.hs
index 457a689..8334328 100644
--- a/src-libinterfacetests/Main.hs
+++ b/src-libinterfacetests/Main.hs
@@ -25,7 +25,7 @@ main = hspec $ do
             , "  , 00000000000000000000000"
             , "  ]"
             ]
-      output <- liftIO $ pureModuleTransform mempty input
+      output <- liftIO $ parsePrintModule staticDefaultConfig input
       input `shouldSatisfy` \_ -> case output of
         Right x | x == expected -> True
         _                       -> False
diff --git a/src-literatetests/Main.hs b/src-literatetests/Main.hs
index 9196dba..fdac364 100644
--- a/src-literatetests/Main.hs
+++ b/src-literatetests/Main.hs
@@ -131,7 +131,7 @@ main = do
 roundTripEqual :: Text -> Expectation
 roundTripEqual t =
   fmap (fmap PPTextWrapper)
-       (parsePrintModule defaultTestConfig "TestFakeFileName.hs" t)
+       (parsePrintModuleTests defaultTestConfig "TestFakeFileName.hs" t)
     `shouldReturn` Right (PPTextWrapper t)
 
 newtype PPTextWrapper = PPTextWrapper Text
diff --git a/src-unittests/TestUtils.hs b/src-unittests/TestUtils.hs
index 9659e47..e94267a 100644
--- a/src-unittests/TestUtils.hs
+++ b/src-unittests/TestUtils.hs
@@ -23,7 +23,7 @@ import Data.Coerce ( coerce )
 roundTripEqual :: Text -> Expectation
 roundTripEqual t =
   fmap (fmap PPTextWrapper)
-       (parsePrintModule defaultTestConfig "TestFakeFileName.hs" t)
+       (parsePrintModuleTests defaultTestConfig "TestFakeFileName.hs" t)
     `shouldReturn` Right (PPTextWrapper t)
 
 roundTripEqualWithTimeout :: Int -> Text -> Expectation
@@ -31,7 +31,7 @@ roundTripEqualWithTimeout time t =
   timeout time (action >>= evaluate) >>= (`shouldSatisfy`Data.Maybe.isJust)
  where
   action = fmap (fmap PPTextWrapper)
-                (parsePrintModule defaultTestConfig "TestFakeFileName.hs" t)
+                (parsePrintModuleTests defaultTestConfig "TestFakeFileName.hs" t)
 
 newtype PPTextWrapper = PPTextWrapper Text
   deriving Eq
diff --git a/src/Language/Haskell/Brittany.hs b/src/Language/Haskell/Brittany.hs
index 67bae06..706984b 100644
--- a/src/Language/Haskell/Brittany.hs
+++ b/src/Language/Haskell/Brittany.hs
@@ -1,8 +1,15 @@
 {-# LANGUAGE DataKinds #-}
 
 module Language.Haskell.Brittany
-  ( pureModuleTransform
-  , CConfig
+  ( parsePrintModule
+  , staticDefaultConfig
+  , Config
+  , CConfig(..)
+  , CDebugConfig(..)
+  , CLayoutConfig(..)
+  , CErrorHandlingConfig(..)
+  , CForwardOptions(..)
+  , CPreProcessorConfig(..)
   , BrittanyError(..)
   )
 where
diff --git a/src/Language/Haskell/Brittany/Internal.hs b/src/Language/Haskell/Brittany/Internal.hs
index d799290..6ed1dd8 100644
--- a/src/Language/Haskell/Brittany/Internal.hs
+++ b/src/Language/Haskell/Brittany/Internal.hs
@@ -1,8 +1,8 @@
 {-# LANGUAGE DataKinds #-}
 
 module Language.Haskell.Brittany.Internal
-  ( pureModuleTransform
-  , parsePrintModule
+  ( parsePrintModule
+  , parsePrintModuleTests
   , pPrintModule
   , pPrintModuleAndCheck
    -- re-export from utils:
@@ -60,9 +60,8 @@ import qualified GHC.LanguageExtensions.Type as GHC
 --
 -- Note that this function ignores/resets all config values regarding
 -- debugging, i.e. it will never use `trace`/write to stderr.
-pureModuleTransform :: CConfig Option -> Text -> IO (Either [BrittanyError] Text)
-pureModuleTransform oConfigRaw inputText = runEitherT $ do
-  let configRaw = cZipWith fromOptionIdentity staticDefaultConfig oConfigRaw
+parsePrintModule :: Config -> Text -> IO (Either [BrittanyError] Text)
+parsePrintModule configRaw inputText = runEitherT $ do
   let config = configRaw { _conf_debug = _conf_debug staticDefaultConfig }
   let ghcOptions         = config & _conf_forward & _options_ghc & runIdentity
   let config_pp          = config & _conf_preprocessor
@@ -173,8 +172,9 @@ pPrintModuleAndCheck conf anns parsedModule = do
 
 
 -- used for testing mostly, currently.
-parsePrintModule :: Config -> String -> Text -> IO (Either String Text)
-parsePrintModule conf filename input = do
+-- TODO: use parsePrintModule instead and remove this function.
+parsePrintModuleTests :: Config -> String -> Text -> IO (Either String Text)
+parsePrintModuleTests conf filename input = do
   let inputStr = Text.unpack input
   parseResult <- ExactPrint.Parsers.parseModuleFromString filename inputStr
   case parseResult of
@@ -204,8 +204,8 @@ parsePrintModule conf filename input = do
 -- Unfortunately that does not exist yet, so we cannot provide a nominally
 -- pure interface.
 
--- parsePrintModule :: Text -> Either String Text
--- parsePrintModule input = do
+-- parsePrintModuleTests :: Text -> Either String Text
+-- parsePrintModuleTests input = do
 --   let dflags = GHC.unsafeGlobalDynFlags
 --   let fakeFileName = "SomeTestFakeFileName.hs"
 --   let pragmaInfo = GHC.getOptions