diff --git a/communicator/none/communicator.go b/communicator/none/communicator.go
index d903f1c90..267c8c6c6 100644
--- a/communicator/none/communicator.go
+++ b/communicator/none/communicator.go
@@ -38,3 +38,7 @@ func (c *comm) UploadDir(dst string, src string, excl []string) error {
 func (c *comm) Download(path string, output io.Writer) error {
 	return errors.New("Download is not implemented when communicator = 'none'")
 }
+
+func (c *comm) DownloadDir(dst string, src string, excl []string) error {
+	return errors.New("DownloadDir is not implemented when communicator = 'none'")
+}
diff --git a/communicator/none/communicator_test.go b/communicator/none/communicator_test.go
new file mode 100644
index 000000000..fd5c6b13c
--- /dev/null
+++ b/communicator/none/communicator_test.go
@@ -0,0 +1,16 @@
+package none
+
+import (
+	"testing"
+
+	"github.com/mitchellh/packer/packer"
+)
+
+func TestCommIsCommunicator(t *testing.T) {
+	var raw interface{}
+	raw = &comm{}
+	if _, ok := raw.(packer.Communicator); !ok {
+		t.Fatalf("comm must be a communicator")
+	}
+}
+