diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index 8ace9f6a6..1869b0f18 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -1357,8 +1357,8 @@ func TestEIP155Transition(t *testing.T) {
 		}
 	})
 	_, err := blockchain.InsertChain(blocks)
-	if err != types.ErrInvalidChainId {
-		t.Error("expected error:", types.ErrInvalidChainId)
+	if have, want := err, types.ErrInvalidChainId; !errors.Is(have, want) {
+		t.Errorf("have %v, want %v", have, want)
 	}
 }
 
diff --git a/core/state_processor_test.go b/core/state_processor_test.go
index 28baf6e7d..c15d3d276 100644
--- a/core/state_processor_test.go
+++ b/core/state_processor_test.go
@@ -39,7 +39,22 @@ import (
 // contain invalid transactions
 func TestStateProcessorErrors(t *testing.T) {
 	var (
-		signer     = types.LatestSigner(params.TestChainConfig)
+		config = &params.ChainConfig{
+			ChainID:             big.NewInt(1),
+			HomesteadBlock:      big.NewInt(0),
+			EIP150Block:         big.NewInt(0),
+			EIP155Block:         big.NewInt(0),
+			EIP158Block:         big.NewInt(0),
+			ByzantiumBlock:      big.NewInt(0),
+			ConstantinopleBlock: big.NewInt(0),
+			PetersburgBlock:     big.NewInt(0),
+			IstanbulBlock:       big.NewInt(0),
+			MuirGlacierBlock:    big.NewInt(0),
+			BerlinBlock:         big.NewInt(0),
+			LondonBlock:         big.NewInt(0),
+			Ethash:              new(params.EthashConfig),
+		}
+		signer     = types.LatestSigner(config)
 		testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
 	)
 	var makeTx = func(nonce uint64, to common.Address, amount *big.Int, gasLimit uint64, gasPrice *big.Int, data []byte) *types.Transaction {
@@ -61,7 +76,7 @@ func TestStateProcessorErrors(t *testing.T) {
 		var (
 			db    = rawdb.NewMemoryDatabase()
 			gspec = &Genesis{
-				Config: params.TestChainConfig,
+				Config: config,
 				Alloc: GenesisAlloc{
 					common.HexToAddress("0x71562b71999873DB5b286dF957af199Ec94617F7"): GenesisAccount{
 						Balance: big.NewInt(1000000000000000000), // 1 ether