diff --git a/lib/copy-sync/__tests__/copy-sync-prevent-copying-into-itself.test.js b/lib/copy-sync/__tests__/copy-sync-prevent-copying-into-itself.test.js
index 1edffc7b..60cb8c85 100644
--- a/lib/copy-sync/__tests__/copy-sync-prevent-copying-into-itself.test.js
+++ b/lib/copy-sync/__tests__/copy-sync-prevent-copying-into-itself.test.js
@@ -63,7 +63,7 @@ describe('+ copySync() - prevent copying into itself', () => {
 
   describe('> when source is a directory', () => {
     describe('>> when dest is a directory', () => {
-      if (os.platform !== 'win32') {
+      if (os.platform() !== 'win32') {
         it(`of not itself`, done => {
           const dest = path.join(TEST_DIR, src)
           return testSuccess(src, dest, done)