diff --git a/test/integration/lib/StackTest.hs b/test/integration/lib/StackTest.hs
index 137ed4c90d..eda29d15ae 100644
--- a/test/integration/lib/StackTest.hs
+++ b/test/integration/lib/StackTest.hs
@@ -122,9 +122,6 @@ exeExt = if isWindows then ".exe" else ""
 -- | Is the OS Windows?
 isWindows = os == "mingw32"
 
--- | Is the OS Mac OS X?
-isMacOSX = os == "darwin"
-
 -- | To avoid problems with GHC version mismatch when a new LTS major
 -- version is released, pass this argument to @stack@ when running in
 -- a global context.  The LTS major version here should match that of
diff --git a/test/integration/tests/1336-1337-new-package-names/Main.hs b/test/integration/tests/1336-1337-new-package-names/Main.hs
index 02c6f9bab7..8f091b6fb6 100644
--- a/test/integration/tests/1336-1337-new-package-names/Main.hs
+++ b/test/integration/tests/1336-1337-new-package-names/Main.hs
@@ -1,5 +1,4 @@
 import StackTest
-import Control.Monad
 import System.Directory
 import System.FilePath
 
@@ -18,7 +17,7 @@ main =
             stackErr ["new", "44444444444444"]
             stackErr ["new", "abc-1"]
             stackErr ["new", "444-ば日本-4本"]
-            unless isMacOSX $ stack ["new", "ば日本-4本"]
+            stack ["new", "ば日本-4本"]
             stack ["new", "אבהץש"]
             stack ["new", "ΔΘΩϬ"]
             doesExist "./ΔΘΩϬ/stack.yaml"