diff --git a/src/builtins/mod.rs b/src/builtins/mod.rs
index b48b346..5977459 100644
--- a/src/builtins/mod.rs
+++ b/src/builtins/mod.rs
@@ -126,6 +126,11 @@ mod tests {
         assert!(is_builtin("quote"));
     }
 
+    #[test]
+    fn test_is_builtin_time() {
+        assert!(is_builtin("time"));
+    }
+
     #[test]
     fn test_is_builtin_notabuiltin() {
         assert!(!is_builtin("notabuiltin"))