diff --git a/gen/genfs/genfs.go b/gen/genfs/genfs.go
index 351f6f98a..b0bbe664a 100644
--- a/gen/genfs/genfs.go
+++ b/gen/genfs/genfs.go
@@ -23,5 +23,5 @@ func (t FormattedSource) WriteFile(name string, content []byte) error {
 		}
 		out = buf
 	}
-	return os.WriteFile(filepath.Join(t.Root, name), out, 0644)
+	return os.WriteFile(filepath.Join(t.Root, name), out, 0o644)
 }
diff --git a/gen/schema_gen_sum_test.go b/gen/schema_gen_sum_test.go
index 729432a22..43467eb36 100644
--- a/gen/schema_gen_sum_test.go
+++ b/gen/schema_gen_sum_test.go
@@ -26,12 +26,14 @@ func Test_mergeEnums(t *testing.T) {
 			"a", "b",
 			0, 2,
 			false, true,
-			[]any{1}, []any{2},
+			[]any{1},
+			[]any{2},
 		}, []any{
 			"a", "c",
 			0, 3,
 			true,
-			[]any{1}, []any{[]any{1}},
+			[]any{1},
+			[]any{[]any{1}},
 		}, []any{
 			"a",
 			0,
diff --git a/internal/integration/e2e_err_test.go b/internal/integration/e2e_err_test.go
index 1bab900c7..444517db4 100644
--- a/internal/integration/e2e_err_test.go
+++ b/internal/integration/e2e_err_test.go
@@ -10,8 +10,7 @@ import (
 	api "github.com/ogen-go/ogen/internal/integration/sample_err"
 )
 
-type sampleErrServer struct {
-}
+type sampleErrServer struct{}
 
 func (s sampleErrServer) DataCreate(ctx context.Context, req api.OptData) (*api.Data, error) {
 	panic("implement me")
diff --git a/internal/integration/metrics_test.go b/internal/integration/metrics_test.go
index 20134d423..b65857de8 100644
--- a/internal/integration/metrics_test.go
+++ b/internal/integration/metrics_test.go
@@ -46,8 +46,11 @@ func (h metricsTestHandler) APIKey(ctx context.Context, operationName string) (a
 }
 
 var _ api.Handler = metricsTestHandler{}
-var _ api.SecurityHandler = metricsTestHandler{}
-var _ api.SecuritySource = metricsTestHandler{}
+
+var (
+	_ api.SecurityHandler = metricsTestHandler{}
+	_ api.SecuritySource  = metricsTestHandler{}
+)
 
 func labelerMiddleware(req middleware.Request, next middleware.Next) (middleware.Response, error) {
 	labeler, _ := api.LabelerFromContext(req.Context)
diff --git a/json/unix_str_test.go b/json/unix_str_test.go
index 3c060054a..aff17e815 100644
--- a/json/unix_str_test.go
+++ b/json/unix_str_test.go
@@ -71,6 +71,6 @@ func TestStringUnix(t *testing.T) {
 func TestDecodeStringUnixNano(t *testing.T) {
 	got, err := DecodeStringUnixNano(jx.DecodeStr(`"1586960586000000000"`))
 	require.NoError(t, err)
-	want := time.Date(2020, 04, 15, 14, 23, 06, 0, time.UTC)
+	want := time.Date(2020, 0o4, 15, 14, 23, 0o6, 0, time.UTC)
 	require.True(t, want.Equal(got))
 }
diff --git a/json/unix_test.go b/json/unix_test.go
index aea7f1110..0d597f418 100644
--- a/json/unix_test.go
+++ b/json/unix_test.go
@@ -71,6 +71,6 @@ func TestUnix(t *testing.T) {
 func TestDecodeUnixNano(t *testing.T) {
 	got, err := DecodeUnixNano(jx.DecodeStr(`1586960586000000000`))
 	require.NoError(t, err)
-	want := time.Date(2020, 04, 15, 14, 23, 06, 0, time.UTC)
+	want := time.Date(2020, 0o4, 15, 14, 23, 0o6, 0, time.UTC)
 	require.True(t, want.Equal(got))
 }
diff --git a/json/uuid.go b/json/uuid.go
index 9db569066..4498ad2b7 100644
--- a/json/uuid.go
+++ b/json/uuid.go
@@ -21,7 +21,7 @@ func EncodeUUID(s *jx.Encoder, v uuid.UUID) {
 		length       = len(v)*2 + 4
 		quotedLength = length + 2
 	)
-	var dst = [quotedLength]byte{
+	dst := [quotedLength]byte{
 		0:                '"',
 		quotedLength - 1: '"',
 	}
diff --git a/validate/errors.go b/validate/errors.go
index 42240b693..38a93335a 100644
--- a/validate/errors.go
+++ b/validate/errors.go
@@ -2,9 +2,10 @@ package validate
 
 import (
 	"fmt"
-	"github.com/ogen-go/ogen/ogenregex"
 	"strings"
 
+	"github.com/ogen-go/ogen/ogenregex"
+
 	"github.com/go-faster/errors"
 )