diff --git a/src/test/mod.rs b/src/test/mod.rs
index 758eddb..f39763a 100644
--- a/src/test/mod.rs
+++ b/src/test/mod.rs
@@ -1,2 +1,2 @@
-mod rx;
 mod fs_util;
+mod builder; 
diff --git a/src/test/rx.rs b/src/test/rx.rs
deleted file mode 100644
index 26d541e..0000000
--- a/src/test/rx.rs
+++ /dev/null
@@ -1,13 +0,0 @@
-use crate::app::rx::Observable;
-
-#[test]
-fn test_observable() {
-    let mut observable: Observable<u32> = Observable::new();
-
-    observable.subscribe(|value| {
-        assert_eq!(5, value);
-    });
-
-    observable.next(5);
-}
-