diff --git a/fastcrypto-zkp/src/bls12381/api/tests.rs b/fastcrypto-zkp/src/bls12381/api/tests.rs
index 372204948a..b20ef4094c 100644
--- a/fastcrypto-zkp/src/bls12381/api/tests.rs
+++ b/fastcrypto-zkp/src/bls12381/api/tests.rs
@@ -219,6 +219,10 @@ fn test_prepare_pvk_bytes() {
     let mut modified_bytes = vk_bytes.clone();
     modified_bytes.pop();
     assert!(prepare_pvk_bytes(&modified_bytes).is_err());
+
+    // Empty vk
+    let empty_vk = vec![];
+    assert!(prepare_pvk_bytes(&empty_vk).is_err());
 }
 
 #[test]