diff --git a/beacon_chain/utils/active-validators/src/lib.rs b/beacon_chain/utils/active-validators/src/lib.rs
index ea7812193..0d79ba0e9 100644
--- a/beacon_chain/utils/active-validators/src/lib.rs
+++ b/beacon_chain/utils/active-validators/src/lib.rs
@@ -24,3 +24,45 @@ pub fn active_validator_indices(validators: &[ValidatorRecord])
         })
         .collect()
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_active_validator() {
+        let mut validators = vec![];
+
+        let (mut v, _) = ValidatorRecord::zero_with_thread_rand_keypair();
+        v.status = ValidatorStatus::Active as u8;
+        assert!(validator_is_active(&v));
+        validators.push(v);
+
+        let (mut v, _) = ValidatorRecord::zero_with_thread_rand_keypair();
+        v.status = ValidatorStatus::PendingActivation as u8;
+        assert!(!validator_is_active(&v));
+        validators.push(v);
+
+        let (mut v, _) = ValidatorRecord::zero_with_thread_rand_keypair();
+        v.status = ValidatorStatus::PendingExit as u8;
+        assert!(!validator_is_active(&v));
+        validators.push(v);
+
+        let (mut v, _) = ValidatorRecord::zero_with_thread_rand_keypair();
+        v.status = ValidatorStatus::PendingWithdraw as u8;
+        assert!(!validator_is_active(&v));
+        validators.push(v);
+
+        let (mut v, _) = ValidatorRecord::zero_with_thread_rand_keypair();
+        v.status = ValidatorStatus::Withdrawn as u8;
+        assert!(!validator_is_active(&v));
+        validators.push(v);
+
+        let (mut v, _) = ValidatorRecord::zero_with_thread_rand_keypair();
+        v.status = ValidatorStatus::Penalized as u8;
+        assert!(!validator_is_active(&v));
+        validators.push(v);
+
+        assert_eq!(active_validator_indices(&validators), vec![0]);
+    }
+}