diff --git a/client/errors_test.go b/client/errors_test.go
index 90114d7..53872fa 100644
--- a/client/errors_test.go
+++ b/client/errors_test.go
@@ -33,7 +33,8 @@ func TestErrors(t *testing.T) {
 		{
 			check: client.IsErrSessionExpired,
 			err:   new(apistatus.SessionTokenExpired),
-		}, {
+		},
+		{
 			check: client.IsErrSessionNotFound,
 			err:   new(apistatus.SessionTokenNotFound),
 		},
diff --git a/client/netmap.go b/client/netmap.go
index f2c2e06..8bedf46 100644
--- a/client/netmap.go
+++ b/client/netmap.go
@@ -186,8 +186,7 @@ func (c *Client) NetworkInfo(ctx context.Context, prm PrmNetworkInfo) (*ResNetwo
 }
 
 // PrmNetMapSnapshot groups parameters of NetMapSnapshot operation.
-type PrmNetMapSnapshot struct {
-}
+type PrmNetMapSnapshot struct{}
 
 // ResNetMapSnapshot groups resulting values of NetMapSnapshot operation.
 type ResNetMapSnapshot struct {
diff --git a/container/container.go b/container/container.go
index 9c6c0f8..8c9c447 100644
--- a/container/container.go
+++ b/container/container.go
@@ -355,7 +355,7 @@ func (x Container) IterateAttributes(f func(key, val string)) {
 func (x Container) IterateUserAttributes(f func(key, val string)) {
 	attrs := x.v2.GetAttributes()
 	for _, attr := range attrs {
-		var key = attr.GetKey()
+		key := attr.GetKey()
 		if !strings.HasPrefix(key, container.SysAttributePrefix) &&
 			!strings.HasPrefix(key, container.SysAttributePrefixNeoFS) {
 			f(key, attr.GetValue())
diff --git a/eacl/validator.go b/eacl/validator.go
index dd313bb..2ac406a 100644
--- a/eacl/validator.go
+++ b/eacl/validator.go
@@ -7,8 +7,7 @@ import (
 // Validator is a tool that calculates
 // the action on a request according
 // to the extended ACL rule table.
-type Validator struct {
-}
+type Validator struct{}
 
 // NewValidator creates and initializes a new Validator using options.
 func NewValidator() *Validator {
diff --git a/netmap/bench_test.go b/netmap/bench_test.go
index 9793df6..e0dc7c5 100644
--- a/netmap/bench_test.go
+++ b/netmap/bench_test.go
@@ -53,7 +53,6 @@ func BenchmarkNetmap_ContainerNodes(b *testing.B) {
 					b.Fatal(err)
 				}
 			}
-
 		})
 	}
 }
diff --git a/netmap/policy_test.go b/netmap/policy_test.go
index 81b7b48..1d5487b 100644
--- a/netmap/policy_test.go
+++ b/netmap/policy_test.go
@@ -31,7 +31,7 @@ func TestPlacementPolicyEncoding(t *testing.T) {
 }
 
 func TestPlacementPolicyWriteString(t *testing.T) {
-	var testCases = []struct {
+	testCases := []struct {
 		name   string
 		input  string
 		output string // If the output is empty, make it equal to input.
diff --git a/netmap/selector_test.go b/netmap/selector_test.go
index 24b2941..934ff7e 100644
--- a/netmap/selector_test.go
+++ b/netmap/selector_test.go
@@ -99,10 +99,12 @@ func BenchmarkPolicyHRWType(b *testing.B) {
 	p := newPlacementPolicy(1,
 		[]ReplicaDescriptor{
 			newReplica(1, "loc1"),
-			newReplica(1, "loc2")},
+			newReplica(1, "loc2"),
+		},
 		[]Selector{
 			newSelector("loc1", "Location", 1, "loc1", (*Selector).SelectSame),
-			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame)},
+			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame),
+		},
 		[]Filter{
 			newFilter("loc1", "Location", "Shanghai", netmap.EQ),
 			newFilter("loc2", "Location", "Shanghai", netmap.NE),
@@ -144,10 +146,12 @@ func TestPlacementPolicy_DeterministicOrder(t *testing.T) {
 	p := newPlacementPolicy(1,
 		[]ReplicaDescriptor{
 			newReplica(1, "loc1"),
-			newReplica(1, "loc2")},
+			newReplica(1, "loc2"),
+		},
 		[]Selector{
 			newSelector("loc1", "Location", 1, "loc1", (*Selector).SelectSame),
-			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame)},
+			newSelector("loc2", "Location", 1, "loc2", (*Selector).SelectSame),
+		},
 		[]Filter{
 			newFilter("loc1", "Location", "Shanghai", netmap.EQ),
 			newFilter("loc2", "Location", "Shanghai", netmap.NE),
diff --git a/object/transformer/channel_test.go b/object/transformer/channel_test.go
index 7a31c7b..cde2e70 100644
--- a/object/transformer/channel_test.go
+++ b/object/transformer/channel_test.go
@@ -36,7 +36,7 @@ func TestChannelTarget(t *testing.T) {
 	actualIDs := writeObject(t, ctx, chTarget, hdr, payload)
 	_ = expectedIDs
 	_ = actualIDs
-	//require.Equal(t, expectedIDs, actualIDs)
+	// require.Equal(t, expectedIDs, actualIDs)
 
 	for i := range tt.objects {
 		select {
diff --git a/pool/tree/client.go b/pool/tree/client.go
index d6dd57c..476026f 100644
--- a/pool/tree/client.go
+++ b/pool/tree/client.go
@@ -23,10 +23,8 @@ type treeClient struct {
 	healthy bool
 }
 
-var (
-	// ErrUnhealthyEndpoint is returned when client in the pool considered unavailable.
-	ErrUnhealthyEndpoint = errors.New("unhealthy endpoint")
-)
+// ErrUnhealthyEndpoint is returned when client in the pool considered unavailable.
+var ErrUnhealthyEndpoint = errors.New("unhealthy endpoint")
 
 // newTreeClient creates new tree client with auto dial.
 func newTreeClient(addr string, opts ...grpc.DialOption) *treeClient {
diff --git a/pool/tree/pool_test.go b/pool/tree/pool_test.go
index b0d35f5..f85b656 100644
--- a/pool/tree/pool_test.go
+++ b/pool/tree/pool_test.go
@@ -211,7 +211,6 @@ func TestRetry(t *testing.T) {
 		checkIndicesAndReset(t, p, 0, 2)
 		p.maxRequestAttempts = oldVal
 	})
-
 }
 
 func TestRebalance(t *testing.T) {