diff --git a/substrate/node/src/keystore.rs b/substrate/node/src/keystore.rs
index ca00e79b..f7b9110f 100644
--- a/substrate/node/src/keystore.rs
+++ b/substrate/node/src/keystore.rs
@@ -8,6 +8,9 @@ pub struct Keystore(sr25519::Pair);
 impl Keystore {
   pub fn from_env() -> Option<Self> {
     let mut key_hex = serai_env::var("KEY")?;
+    if key_hex.is_empty() {
+      None?;
+    }
     let mut key = hex::decode(&key_hex).expect("KEY from environment wasn't hex");
     key_hex.zeroize();
 
diff --git a/tests/coordinator/src/lib.rs b/tests/coordinator/src/lib.rs
index 0541c4fd..d09f4487 100644
--- a/tests/coordinator/src/lib.rs
+++ b/tests/coordinator/src/lib.rs
@@ -66,7 +66,9 @@ pub fn serai_composition(name: &str) -> TestBodySpecification {
   TestBodySpecification::with_image(
     Image::with_repository("serai-dev-serai").pull_policy(PullPolicy::Never),
   )
-  .replace_env([("SERAI_NAME".to_string(), name.to_lowercase())].into())
+  .replace_env(
+    [("SERAI_NAME".to_string(), name.to_lowercase()), ("KEY".to_string(), String::new())].into(),
+  )
   .set_publish_all_ports(true)
 }