diff --git a/brittany.cabal b/brittany.cabal
index d659a6a..3589ed9 100644
--- a/brittany.cabal
+++ b/brittany.cabal
@@ -138,12 +138,3 @@ test-suite littests
     , parsec ^>= 3.1.14
   main-is:          Main.hs
   hs-source-dirs:   src-literatetests
-
-test-suite libinterfacetests
-  import: executable
-
-  type:             exitcode-stdio-1.0
-  build-depends:
-    , hspec ^>= 2.8.3
-  main-is:          Main.hs
-  hs-source-dirs:   src-libinterfacetests
diff --git a/src-libinterfacetests/Main.hs b/src-libinterfacetests/Main.hs
deleted file mode 100644
index 2d1924f..0000000
--- a/src-libinterfacetests/Main.hs
+++ /dev/null
@@ -1,27 +0,0 @@
-import           Test.Hspec
-import           Language.Haskell.Brittany
-import qualified Data.Text as Text
-import           Control.Monad.IO.Class
-
-
-
-main :: IO ()
-main = hspec $ do
-  describe "library interface basic functionality" $ do
-    it "gives properly formatted result for valid input" $ do
-      let
-        input = Text.pack $ unlines
-          ["func = [00000000000000000000000, 00000000000000000000000, 00000000000000000000000, 00000000000000000000000]"]
-      let expected = Text.pack $ unlines
-            [ "func ="
-            , "  [ 00000000000000000000000"
-            , "  , 00000000000000000000000"
-            , "  , 00000000000000000000000"
-            , "  , 00000000000000000000000"
-            , "  ]"
-            ]
-      output <- liftIO $ parsePrintModule staticDefaultConfig input
-      hush output `shouldBe` Just expected
-
-hush :: Either a b -> Maybe b
-hush = either (const Nothing) Just
diff --git a/src-literatetests/Main.hs b/src-literatetests/Main.hs
index e97252d..dbc2ee5 100644
--- a/src-literatetests/Main.hs
+++ b/src-literatetests/Main.hs
@@ -32,6 +32,9 @@ import System.Timeout ( timeout )
 
 import Language.Haskell.Brittany.Internal.PreludeUtils
 
+hush :: Either a b -> Maybe b
+hush = either (const Nothing) Just
+
 
 
 asymptoticPerfTest :: Spec
@@ -92,6 +95,21 @@ main = do
   let groupsCtxFree = createChunks inputCtxFree
   hspec $ do
     describe "asymptotic perf roundtrips" $ asymptoticPerfTest
+    describe "library interface basic functionality" $ do
+      it "gives properly formatted result for valid input" $ do
+        let
+          input = Text.pack $ unlines
+            ["func = [00000000000000000000000, 00000000000000000000000, 00000000000000000000000, 00000000000000000000000]"]
+        let expected = Text.pack $ unlines
+              [ "func ="
+              , "  [ 00000000000000000000000"
+              , "  , 00000000000000000000000"
+              , "  , 00000000000000000000000"
+              , "  , 00000000000000000000000"
+              , "  ]"
+              ]
+        output <- liftIO $ parsePrintModule staticDefaultConfig input
+        hush output `shouldBe` Just expected
     groups `forM_` \(groupname, tests) -> do
       describe (Text.unpack groupname) $ do
         tests `forM_` \test -> do