diff --git a/Cargo.toml b/Cargo.toml
index 26b13cb..8c223fb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "minstant"
-version = "0.1.5"
+version = "0.1.6"
 authors = ["The TiKV Authors"]
 edition = "2021"
 license = "MIT"
diff --git a/src/lib.rs b/src/lib.rs
index d069405..77b8247 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -121,6 +121,15 @@ mod tests {
         let _ = nanos_per_cycle();
     }
 
+    #[test]
+    #[wasm_bindgen_test]
+    fn test_unix_time() {
+        let now = Instant::now();
+        let anchor = Anchor::new();
+        let unix_nanos = now.as_unix_nanos(&anchor);
+        assert!(unix_nanos > 0);
+    }
+
     #[test]
     fn test_duration() {
         let mut rng = rand::thread_rng();