diff --git a/testing/web3signer_tests/src/lib.rs b/testing/web3signer_tests/src/lib.rs
index b28b4189a..6d6ee9933 100644
--- a/testing/web3signer_tests/src/lib.rs
+++ b/testing/web3signer_tests/src/lib.rs
@@ -1,3 +1,6 @@
+//! NOTE: These tests will fail without a java runtime environment (such as openjdk) installed and
+//! available on `$PATH`.
+//!
 //! This crate provides a series of integration tests between the Lighthouse `ValidatorStore` and
 //! Web3Signer by Consensys.
 //!