diff --git a/mtglib/internal/dc/public_config_updater.go b/mtglib/internal/dc/public_config_updater.go
index 40ecbe7..8f22832 100644
--- a/mtglib/internal/dc/public_config_updater.go
+++ b/mtglib/internal/dc/public_config_updater.go
@@ -29,8 +29,8 @@ func (p PublicConfigUpdater) Run(ctx context.Context, url, network string) {
 		resp, err := p.http.Do(req)
 		if err != nil {
 			if resp != nil {
-				io.Copy(io.Discard, resp.Body)
-				resp.Body.Close()
+				io.Copy(io.Discard, resp.Body) //nolint: errcheck
+				resp.Body.Close()              //nolint: errcheck
 			}
 			return fmt.Errorf("cannot fetch url %s: %w", url, err)
 		}
diff --git a/mtglib/internal/dc/public_config_updater_test.go b/mtglib/internal/dc/public_config_updater_test.go
index 4da1773..f51f3a2 100644
--- a/mtglib/internal/dc/public_config_updater_test.go
+++ b/mtglib/internal/dc/public_config_updater_test.go
@@ -90,7 +90,7 @@ lala 0 0
 	s.responseHandler = func(w http.ResponseWriter) {
 		done = true
 		w.WriteHeader(http.StatusOK)
-		w.Write([]byte(result))
+		w.Write([]byte(result)) //nolint: errcheck
 	}
 	go s.u.Run(s.ctx, s.srv.URL, "tcp4")
 
@@ -114,7 +114,7 @@ proxy_for -100 101.10.0.0:3333;
 	s.responseHandler = func(w http.ResponseWriter) {
 		done = true
 		w.WriteHeader(http.StatusOK)
-		w.Write([]byte(result))
+		w.Write([]byte(result)) //nolint: errcheck
 	}
 	go s.u.Run(s.ctx, s.srv.URL, "tcp4")
 
diff --git a/mtglib/internal/dc/telegram.go b/mtglib/internal/dc/telegram.go
index c9a85d4..fcd3fd7 100644
--- a/mtglib/internal/dc/telegram.go
+++ b/mtglib/internal/dc/telegram.go
@@ -1,14 +1,12 @@
 package dc
 
 import (
-	"context"
 	"fmt"
 	"strings"
 	"sync"
 )
 
 type Telegram struct {
-	ctx      context.Context
 	lock     sync.RWMutex
 	view     dcView
 	preferIP preferIP
diff --git a/mtglib/internal/obfuscation/obfuscator_test.go b/mtglib/internal/obfuscation/obfuscator_test.go
index 0280b26..fbc018e 100644
--- a/mtglib/internal/obfuscation/obfuscator_test.go
+++ b/mtglib/internal/obfuscation/obfuscator_test.go
@@ -20,7 +20,7 @@ type ObfuscatorTestSuite struct {
 }
 
 func (s *ObfuscatorTestSuite) SetupSuite() {
-	s.SnapshotTestSuite.Setup("", "client-handshake")
+	s.Setup("", "client-handshake")
 
 	secret := mtglib.GenerateSecret("hostname.com")
 	s.secret = &secret
diff --git a/mtglib/proxy.go b/mtglib/proxy.go
index 78f239d..1f12345 100644
--- a/mtglib/proxy.go
+++ b/mtglib/proxy.go
@@ -245,7 +245,7 @@ func (p *Proxy) doTelegramCall(ctx *streamContext) error {
 
 	tgConn, err := foundAddr.Obfuscator.SendHandshake(conn, ctx.dc)
 	if err != nil {
-		conn.Close()
+		conn.Close() // nolint: errcheck
 		return fmt.Errorf("cannot perform server handshake: %w", err)
 	}