diff --git a/.gitignore b/.gitignore
index 9830ef39bea..ae9f83c46dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,6 @@ perf.data*
 /bin
 genesis.ssz
 /clippy.toml
+
+# IntelliJ
+/*.iml
diff --git a/testing/web3signer_tests/build.rs b/testing/web3signer_tests/build.rs
index ac34b5197fc..3dc397e68bd 100644
--- a/testing/web3signer_tests/build.rs
+++ b/testing/web3signer_tests/build.rs
@@ -10,7 +10,9 @@ use zip::ZipArchive;
 
 /// Use `None` to download the latest Github release.
 /// Use `Some("21.8.1")` to download a specific version.
-const FIXED_VERSION_STRING: Option<&str> = None;
+const FIXED_VERSION_STRING: Option<String> =
+    env::var("LIGHTHOUSE_WEB3SIGNER_VERSION")
+    .ok();
 
 #[tokio::main]
 async fn main() {