diff --git a/fixed_wide/src/lib.rs b/fixed_wide/src/lib.rs
index 4d35f29..b593a63 100644
--- a/fixed_wide/src/lib.rs
+++ b/fixed_wide/src/lib.rs
@@ -9,3 +9,6 @@ pub mod typenum{
 mod fixed_wide_traits;
 #[cfg(feature="fixed_wide_traits")]
 pub use ::fixed_wide_traits::wide;
+
+#[cfg(test)]
+mod tests;
diff --git a/fixed_wide/src/tests.rs b/fixed_wide/src/tests.rs
new file mode 100644
index 0000000..0029267
--- /dev/null
+++ b/fixed_wide/src/tests.rs
@@ -0,0 +1,14 @@
+use fixed_wide_traits::wide::WideMul;
+
+#[test]
+fn test_wide_mul(){
+	let a=crate::types::I32F32::ONE;
+	let aa=a.wide_mul(a);
+	assert_eq!(aa,crate::types::I64F64::ONE);
+}
+
+#[test]
+fn test_bint(){
+	let a=crate::types::I32F32::ONE;
+	assert_eq!(a*2,crate::types::I32F32::from(2));
+}