Fix some rustc warnings
diff --git a/src/test/mod.rs b/src/test/mod.rs
index a15121a..53ac34c 100644
--- a/src/test/mod.rs
+++ b/src/test/mod.rs
@@ -1,9 +1,9 @@
 use std::collections::HashMap;
 use std::sync::{Arc, RwLock};
 
-use super::{Editor, Result};
+use super::{Editor, Result, StdStream};
 use completion::Completer;
-use config::{Config, EditMode};
+use config::{Config, EditMode, OutputStreamType};
 use edit::init_state;
 use keymap::{Cmd, InputState};
 use keys::KeyPress;
@@ -105,3 +105,8 @@
         assert_line(*mode, &[KeyPress::UnknownEscSeq, KeyPress::Enter], "");
     }
 }
+
+#[test]
+fn from_stream_type() {
+    StdStream::from_stream_type(OutputStreamType::Stdout);
+}