diff --git a/cmd/lotus-storage-miner/proving.go b/cmd/lotus-storage-miner/proving.go
index f053af054..b930476e6 100644
--- a/cmd/lotus-storage-miner/proving.go
+++ b/cmd/lotus-storage-miner/proving.go
@@ -443,6 +443,9 @@ var provingCheckProvableCmd = &cli.Command{
 			sectors := make(map[abi.SectorNumber]struct{})
 
 			sectorInfos, err := api.StateMinerSectors(ctx, addr, &par.AllSectors, types.EmptyTSK)
+			if err != nil {
+				return err
+			}
 
 			var tocheck []storage.SectorRef
 			for _, info := range sectorInfos {
diff --git a/extern/sector-storage/mock/mock.go b/extern/sector-storage/mock/mock.go
index 6179f40d7..59d7d0503 100644
--- a/extern/sector-storage/mock/mock.go
+++ b/extern/sector-storage/mock/mock.go
@@ -405,14 +405,14 @@ func (mgr *SectorMgr) Remove(ctx context.Context, sector storage.SectorRef) erro
 	return nil
 }
 
-func (mgr *SectorMgr) CheckProvable(ctx context.Context, pp abi.RegisteredPoStProof, ids []storage.SectorRef) ([]abi.SectorID, error) {
-	var bad []abi.SectorID
+func (mgr *SectorMgr) CheckProvable(ctx context.Context, pp abi.RegisteredPoStProof, ids []storage.SectorRef) (map[abi.SectorID]string, error) {
+	bad := map[abi.SectorID]string{}
 
 	for _, sid := range ids {
 		_, found := mgr.sectors[sid.ID]
 
 		if !found || mgr.sectors[sid.ID].failed {
-			bad = append(bad, sid.ID)
+			bad[sid.ID] = "mock fail"
 		}
 	}
 
diff --git a/storage/wdpost_run_test.go b/storage/wdpost_run_test.go
index d426f5f31..5b85261c2 100644
--- a/storage/wdpost_run_test.go
+++ b/storage/wdpost_run_test.go
@@ -125,9 +125,9 @@ func (m *mockProver) GenerateWindowPoSt(ctx context.Context, aid abi.ActorID, si
 type mockFaultTracker struct {
 }
 
-func (m mockFaultTracker) CheckProvable(ctx context.Context, pp abi.RegisteredPoStProof, sectors []storage.SectorRef) ([]abi.SectorID, error) {
+func (m mockFaultTracker) CheckProvable(ctx context.Context, pp abi.RegisteredPoStProof, sectors []storage.SectorRef) (map[abi.SectorID]string, error) {
 	// Returns "bad" sectors so just return nil meaning all sectors are good
-	return nil, nil
+	return map[abi.SectorID]string{}, nil
 }
 
 // TestWDPostDoPost verifies that doPost will send the correct number of window