diff --git a/language-dockerfile.cabal b/language-dockerfile.cabal
--- a/language-dockerfile.cabal
+++ b/language-dockerfile.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           language-dockerfile
-version:        0.3.1.0
+version:        0.3.2.0
 synopsis:       Dockerfile linter, parser, pretty-printer and embedded DSL
 description:     Forked from @hadolint@.
                 .
diff --git a/test/Language/Dockerfile/EDSLSpec.hs b/test/Language/Dockerfile/EDSLSpec.hs
--- a/test/Language/Dockerfile/EDSLSpec.hs
+++ b/test/Language/Dockerfile/EDSLSpec.hs
@@ -2,6 +2,7 @@
 module Language.Dockerfile.EDSLSpec where
 
 import           Control.Monad.IO.Class
+import           Data.List                       (sort)
 import           Language.Dockerfile.EDSL
 import           Language.Dockerfile.PrettyPrint
 import qualified Language.Dockerfile.Syntax      as Syntax
@@ -52,7 +53,7 @@
                 fs <- liftIO $ do
                     cwd <- getCurrentDirectory
                     fs <- glob "./test/*.hs"
-                    return (map (makeRelative cwd) fs)
+                    return (map (makeRelative cwd) (sort fs))
                 from "ubuntu"
                 mapM_ (\f -> add f ("/app/" ++ takeFileName f)) fs
             str `shouldBe` unlines [ "FROM ubuntu"