diff --git a/miner/miner_test.go b/miner/miner_test.go
index 411d6026ce..24c626d12b 100644
--- a/miner/miner_test.go
+++ b/miner/miner_test.go
@@ -59,6 +59,10 @@ func (m *mockBackend) TxPool() *txpool.TxPool {
 	return m.txPool
 }
 
+func (m *mockBackend) Downloader() *downloader.Downloader {
+	return nil
+}
+
 func (m *mockBackend) StateAtBlock(block *types.Block, reexec uint64, base *state.StateDB, checkLive bool, preferDisk bool) (statedb *state.StateDB, err error) {
 	return nil, errors.New("not supported")
 }
diff --git a/miner/worker_test.go b/miner/worker_test.go
index aa05565301..c84a03cd01 100644
--- a/miner/worker_test.go
+++ b/miner/worker_test.go
@@ -34,6 +34,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/eth/downloader"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/params"
@@ -144,8 +145,9 @@ func newTestWorkerBackend(t *testing.T, chainConfig *params.ChainConfig, engine
 	}
 }
 
-func (b *testWorkerBackend) BlockChain() *core.BlockChain { return b.chain }
-func (b *testWorkerBackend) TxPool() *txpool.TxPool       { return b.txPool }
+func (b *testWorkerBackend) BlockChain() *core.BlockChain       { return b.chain }
+func (b *testWorkerBackend) TxPool() *txpool.TxPool             { return b.txPool }
+func (b *testWorkerBackend) Downloader() *downloader.Downloader { return nil }
 
 func (b *testWorkerBackend) newRandomTx(creation bool) *types.Transaction {
 	var tx *types.Transaction