diff --git a/lighthouse/tests/validator_client.rs b/lighthouse/tests/validator_client.rs
index 3e85375971..1fc5d22698 100644
--- a/lighthouse/tests/validator_client.rs
+++ b/lighthouse/tests/validator_client.rs
@@ -2,6 +2,7 @@ use validator_client::{config::DEFAULT_WEB3SIGNER_KEEP_ALIVE, ApiTopic, Config};
 
 use crate::exec::CommandLineTestExec;
 use bls::{Keypair, PublicKeyBytes};
+use sensitive_url::SensitiveUrl;
 use std::fs::File;
 use std::io::Write;
 use std::net::IpAddr;
@@ -672,3 +673,26 @@ fn validator_web3_signer_keep_alive_override() {
             );
         });
 }
+
+#[test]
+fn validator_proposer_nodes_default_empty() {
+    CommandLineTest::new().run().with_config(|config| {
+        assert_eq!(config.proposer_nodes, vec![]);
+    });
+}
+
+#[test]
+fn validator_proposer_nodes() {
+    CommandLineTest::new()
+        .flag("proposer-nodes", Some("http://bn-1:5052,http://bn-2:5052"))
+        .run()
+        .with_config(|config| {
+            assert_eq!(
+                config.proposer_nodes,
+                vec![
+                    SensitiveUrl::parse("http://bn-1:5052").unwrap(),
+                    SensitiveUrl::parse("http://bn-2:5052").unwrap()
+                ]
+            );
+        });
+}
diff --git a/validator_client/src/config.rs b/validator_client/src/config.rs
index 3edab712b3..7378d924b7 100644
--- a/validator_client/src/config.rs
+++ b/validator_client/src/config.rs
@@ -187,7 +187,7 @@ impl Config {
                 .collect::<Result<_, _>>()
                 .map_err(|e| format!("Unable to parse beacon node URL: {:?}", e))?;
         }
-        if let Some(proposer_nodes) = parse_optional::<String>(cli_args, "proposer_nodes")? {
+        if let Some(proposer_nodes) = parse_optional::<String>(cli_args, "proposer-nodes")? {
             config.proposer_nodes = proposer_nodes
                 .split(',')
                 .map(SensitiveUrl::parse)