diff --git a/src/lotus_json/miner_power.rs b/src/lotus_json/miner_power.rs
index bcd41155230..5ab24ee2e30 100644
--- a/src/lotus_json/miner_power.rs
+++ b/src/lotus_json/miner_power.rs
@@ -22,7 +22,7 @@ impl HasLotusJson for MinerPower {
     type LotusJson = MinerPowerLotusJson;
     #[cfg(test)]
     fn snapshots() -> Vec<(serde_json::Value, Self)> {
-        vec![]
+        unimplemented!("see commented-out test, below")
     }
     fn into_lotus_json(self) -> Self::LotusJson {
         MinerPowerLotusJson {
@@ -39,3 +39,9 @@ impl HasLotusJson for MinerPower {
         }
     }
 }
+
+// MinerPower: !Debug
+// #[test]
+// fn snapshots() {
+//     assert_all_snapshots::<MinerPower>();
+// }
diff --git a/src/lotus_json/mod.rs b/src/lotus_json/mod.rs
index fbc92e42750..d5fccc946a7 100644
--- a/src/lotus_json/mod.rs
+++ b/src/lotus_json/mod.rs
@@ -222,7 +222,7 @@ mod hash_map;
 mod ipld; // NaN != NaN
 mod miner_info; // fil_actor_miner_state::v12::MinerInfo: !quickcheck::Arbitrary
 mod miner_power; // fil_actor_interface::miner::MinerInfo: !quickcheck::Arbitrary
-mod nonempty;
+mod nonempty; // can't make snapshots of generic type
 mod opt; // can't make snapshots of generic type
 mod pending_beneficiary_change; // fil_actor_miner_state::v12::PendingBeneficiaryChange: !quickcheck::Arbitrary
 mod raw_bytes; // fvm_ipld_encoding::RawBytes: !quickcheck::Arbitrary