diff --git a/accounts/keystore/keystore_test.go b/accounts/keystore/keystore_test.go
index 5d8cacd335..ef27f96bb1 100644
--- a/accounts/keystore/keystore_test.go
+++ b/accounts/keystore/keystore_test.go
@@ -17,7 +17,6 @@
 package keystore
 
 import (
-	"errors"
 	"github.com/pkg/errors"
 	"math/rand"
 	"os"
diff --git a/core/rawdb/freezer_table_test.go b/core/rawdb/freezer_table_test.go
index 33b00df5b7..db6d50ad9e 100644
--- a/core/rawdb/freezer_table_test.go
+++ b/core/rawdb/freezer_table_test.go
@@ -19,7 +19,6 @@ package rawdb
 import (
 	"bytes"
 	"encoding/binary"
-	"errors"
 	"fmt"
 	"github.com/pkg/errors"
 	"math/rand"
diff --git a/core/state/snapshot/disklayer_test.go b/core/state/snapshot/disklayer_test.go
index 9425bc102a..f5fb20caf7 100644
--- a/core/state/snapshot/disklayer_test.go
+++ b/core/state/snapshot/disklayer_test.go
@@ -18,7 +18,6 @@ package snapshot
 
 import (
 	"bytes"
-	"errors"
 	"github.com/pkg/errors"
 	"testing"
 
diff --git a/core/state/snapshot/snapshot_test.go b/core/state/snapshot/snapshot_test.go
index 5cd6206cbf..25d085b6b9 100644
--- a/core/state/snapshot/snapshot_test.go
+++ b/core/state/snapshot/snapshot_test.go
@@ -19,7 +19,6 @@ package snapshot
 import (
 	crand "crypto/rand"
 	"encoding/binary"
-	"errors"
 	"fmt"
 	"github.com/pkg/errors"
 	"math/rand"
diff --git a/core/vm/gas_table_test.go b/core/vm/gas_table_test.go
index 77963141d6..6ba55f2ecd 100644
--- a/core/vm/gas_table_test.go
+++ b/core/vm/gas_table_test.go
@@ -18,7 +18,6 @@ package vm
 
 import (
 	"bytes"
-	"errors"
 	"github.com/pkg/errors"
 	"math"
 	"math/big"
diff --git a/eth/downloader/downloader_test.go b/eth/downloader/downloader_test.go
index fce975ca1d..7c3d24f897 100644
--- a/eth/downloader/downloader_test.go
+++ b/eth/downloader/downloader_test.go
@@ -17,7 +17,6 @@
 package downloader
 
 import (
-	"errors"
 	"fmt"
 	"github.com/pkg/errors"
 	"math/big"
diff --git a/ethdb/pebble/pebble.go b/ethdb/pebble/pebble.go
index 55893f3d76..269e52cd3f 100644
--- a/ethdb/pebble/pebble.go
+++ b/ethdb/pebble/pebble.go
@@ -19,7 +19,6 @@ package pebble
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"github.com/pkg/errors"
 	"runtime"
diff --git a/signer/core/api_test.go b/signer/core/api_test.go
index f1952977c1..1574ac5cd9 100644
--- a/signer/core/api_test.go
+++ b/signer/core/api_test.go
@@ -19,7 +19,6 @@ package core_test
 import (
 	"bytes"
 	"context"
-	"errors"
 	"fmt"
 	"github.com/pkg/errors"
 	"math/big"