Fix windows

Signed-off-by: Natalie Arellano <narellano@vmware.com>

internal/selective/write_test.go

@@ -31,12 +31,20 @@ func testSelective(t *testing.T, when spec.G, it spec.S) {
 
 		it.Before(func() {
 			testImageName := "busybox"
+			var opts []remote.Option
 			if runtime.GOOS == "windows" {
 				testImageName = "mcr.microsoft.com/windows/nanoserver:1809"
+				windowsPlatform := v1.Platform{
+					OS: "windows",
+				}
+				opts = append(opts, remote.WithPlatform(windowsPlatform))
 			}
+
 			ref, authr, err := auth.ReferenceForRepoName(authn.DefaultKeychain, testImageName)
 			h.AssertNil(t, err)
-			testImage, err = remote.Image(ref, remote.WithAuth(authr))
+			opts = append(opts, remote.WithAuth(authr))
+
+			testImage, err = remote.Image(ref, opts...)
 			h.AssertNil(t, err)
 
 			tmpDir, err = ioutil.TempDir("", "")