diff --git a/cmd/melt/main_test.go b/cmd/melt/main_test.go
index ce86c6b..d79180a 100644
--- a/cmd/melt/main_test.go
+++ b/cmd/melt/main_test.go
@@ -47,6 +47,11 @@ func TestMaybeFile(t *testing.T) {
 		is := is.New(t)
 		is.Equal("strings", maybeFile("strings"))
 	})
+
+	t.Run("stdin", func(t *testing.T) {
+		is := is.New(t)
+		is.Equal("", maybeFile("-"))
+	})
 }
 
 func sha256sum(tb testing.TB, path string) string {
diff --git a/melt_test.go b/melt_test.go
index 10a2e91..8e3e3e1 100644
--- a/melt_test.go
+++ b/melt_test.go
@@ -1 +1,6 @@
 package melt
+
+import "testing"
+
+func TestToMnemonic(t *testing.T) {
+}