diff --git a/encoding_test.go b/encoding_test.go
index 893c890..f35874b 100644
--- a/encoding_test.go
+++ b/encoding_test.go
@@ -27,8 +27,7 @@ func TestMSGPEncodeDecode(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	err = MSGPDecode(&dst, b1)
-	if err != nil {
+	if err := MSGPDecode(&dst, b1); err != nil {
 		t.Fatal(err)
 	}
 
@@ -46,8 +45,7 @@ func TestBase64EncodeDecode(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	err = Base64Decode(&dst, b1)
-	if err != nil {
+	if err := Base64Decode(&dst, b1); err != nil {
 		t.Fatal(err)
 	}
 
@@ -60,8 +58,11 @@ func BenchmarkMSGPEncode(b *testing.B) {
 	src := getSRC()
 
 	b.ResetTimer()
+
 	for i := 0; i < b.N; i++ {
-		MSGPEncode(src)
+		if _, err := MSGPEncode(src); err != nil {
+			b.Fatal(err)
+		}
 	}
 }
 
@@ -72,8 +73,11 @@ func BenchmarkMSGPDecode(b *testing.B) {
 	srcBytes, _ := MSGPEncode(src)
 
 	b.ResetTimer()
+
 	for i := 0; i < b.N; i++ {
-		MSGPDecode(&dst, srcBytes)
+		if err := MSGPDecode(&dst, srcBytes); err != nil {
+			b.Fatal(err)
+		}
 	}
 }
 
@@ -81,8 +85,11 @@ func BenchmarkBase64Encode(b *testing.B) {
 	src := getSRC()
 
 	b.ResetTimer()
+
 	for i := 0; i < b.N; i++ {
-		Base64Encode(src)
+		if _, err := Base64Encode(src); err != nil {
+			b.Fatal(err)
+		}
 	}
 }
 
@@ -93,7 +100,10 @@ func BenchmarkBase64Decode(b *testing.B) {
 	srcBytes, _ := Base64Encode(src)
 
 	b.ResetTimer()
+
 	for i := 0; i < b.N; i++ {
-		Base64Decode(&dst, srcBytes)
+		if err := Base64Decode(&dst, srcBytes); err != nil {
+			b.Fatal(err)
+		}
 	}
 }
diff --git a/session.go b/session.go
index ea48660..ca90f76 100644
--- a/session.go
+++ b/session.go
@@ -56,7 +56,7 @@ func New(cfg Config) *Session {
 		config: cfg,
 		cookie: newCookie(),
 		log:    cfg.Logger,
-		storePool: &sync.Pool{
+		storePool: sync.Pool{
 			New: func() interface{} {
 				return NewStore()
 			},
@@ -79,9 +79,12 @@ func (s *Session) SetProvider(provider Provider) error {
 }
 
 func (s *Session) startGC() {
+	ticker := time.NewTicker(s.config.GCLifetime)
+	defer ticker.Stop()
+
 	for {
 		select {
-		case <-time.After(s.config.GCLifetime):
+		case <-ticker.C:
 			err := s.provider.GC()
 			if err != nil {
 				s.log.Printf("session GC crash: %v", err)
diff --git a/session_test.go b/session_test.go
index d5859d4..fcba32f 100644
--- a/session_test.go
+++ b/session_test.go
@@ -92,8 +92,8 @@ func Test_New(t *testing.T) {
 		t.Error("Session.cookie is nil")
 	}
 
-	if s.storePool == nil {
-		t.Error("Session.storePool is nil")
+	if v := s.storePool.Get().(*Store); v == nil {
+		t.Errorf("Session.storePool returns: %v", v)
 	}
 }
 
@@ -103,7 +103,10 @@ func TestSession_SetProvider(t *testing.T) {
 	})
 	provider := &mockProvider{needGCValue: true}
 
-	s.SetProvider(provider)
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
 	time.Sleep(s.config.GCLifetime + 100*time.Millisecond)
 	s.stopGC()
 
@@ -266,12 +269,14 @@ func TestSession_GetErrEmptySessionID(t *testing.T) {
 			return []byte("")
 		},
 	})
-	s.SetProvider(new(mockProvider))
+
+	if err := s.SetProvider(new(mockProvider)); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 
 	store, err := s.Get(ctx)
-
 	if err != ErrEmptySessionID {
 		t.Errorf("Expected error: %v", ErrEmptySessionID)
 	}
@@ -284,13 +289,15 @@ func TestSession_GetErrEmptySessionID(t *testing.T) {
 func TestSession_GetProviderError(t *testing.T) {
 	s := New(Config{})
 	provider := &mockProvider{errGet: errors.New("error from provider")}
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 	ctx.Request.Header.SetCookie(s.config.CookieName, "aiasdiasd")
 
 	store, err := s.Get(ctx)
-
 	if err != provider.errGet {
 		t.Errorf("Expected error: %v", provider.errGet)
 	}
@@ -304,18 +311,20 @@ func TestSession_Get(t *testing.T) {
 	s := New(Config{})
 
 	provider := new(mockProvider)
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 
 	store, err := s.Get(ctx)
-
 	if err != nil {
 		t.Errorf("Unexpected error: %v", err)
 	}
 
 	if store == nil {
-		t.Error("The store is nil")
+		t.Fatal("store is nil")
 	}
 
 	if len(store.sessionID) == 0 {
@@ -330,14 +339,15 @@ func TestSession_Get(t *testing.T) {
 func TestSession_SaveProviderError(t *testing.T) {
 	s := New(Config{})
 	provider := &mockProvider{errSave: errors.New("error from provider")}
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 	store := NewStore()
 
-	err := s.Save(ctx, store)
-
-	if err != provider.errSave {
+	if err := s.Save(ctx, store); err != provider.errSave {
 		t.Errorf("Expected error: %v", provider.errGet)
 	}
 }
@@ -345,7 +355,10 @@ func TestSession_SaveProviderError(t *testing.T) {
 func TestSession_Save(t *testing.T) {
 	s := New(Config{})
 	provider := new(mockProvider)
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 
@@ -382,7 +395,10 @@ func TestSession_RegenerateErrEmptySessionID(t *testing.T) {
 			return []byte("")
 		},
 	})
-	s.SetProvider(new(mockProvider))
+
+	if err := s.SetProvider(new(mockProvider)); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 	ctx.Request.Header.SetCookie(s.config.CookieName, "d32r2f2ecev")
@@ -395,7 +411,10 @@ func TestSession_RegenerateErrEmptySessionID(t *testing.T) {
 func TestSession_RegenerateProviderError(t *testing.T) {
 	s := New(Config{})
 	provider := &mockProvider{errRegenerate: errors.New("error from provider")}
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 	ctx.Request.Header.SetCookie(s.config.CookieName, "d32r2f2ecev")
@@ -408,7 +427,10 @@ func TestSession_RegenerateProviderError(t *testing.T) {
 func TestSession_Regenerate(t *testing.T) {
 	s := New(Config{})
 	provider := &mockProvider{}
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	id := "d32r2f2ecev"
 	ctx := new(fasthttp.RequestCtx)
@@ -427,9 +449,7 @@ func TestSession_DestroyErrNotProvider(t *testing.T) {
 	s := New(Config{})
 	ctx := new(fasthttp.RequestCtx)
 
-	err := s.Destroy(ctx)
-
-	if err != ErrNotSetProvider {
+	if err := s.Destroy(ctx); err != ErrNotSetProvider {
 		t.Errorf("Expected error: %v", ErrNotSetProvider)
 	}
 }
@@ -437,13 +457,14 @@ func TestSession_DestroyErrNotProvider(t *testing.T) {
 func TestSession_DestroyIDNotExist(t *testing.T) {
 	s := New(Config{})
 	provider := new(mockProvider)
-	s.SetProvider(provider)
 
-	ctx := new(fasthttp.RequestCtx)
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
-	err := s.Destroy(ctx)
+	ctx := new(fasthttp.RequestCtx)
 
-	if err != nil {
+	if err := s.Destroy(ctx); err != nil {
 		t.Errorf("Unexpected error: %v", err)
 	}
 }
@@ -451,14 +472,15 @@ func TestSession_DestroyIDNotExist(t *testing.T) {
 func TestSession_DestroyProviderError(t *testing.T) {
 	s := New(Config{})
 	provider := &mockProvider{errDestroy: errors.New("error from provider")}
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 	ctx.Request.Header.SetCookie(s.config.CookieName, "asd2324n")
 
-	err := s.Destroy(ctx)
-
-	if err != provider.errDestroy {
+	if err := s.Destroy(ctx); err != provider.errDestroy {
 		t.Errorf("Expected error: %v", provider.errDestroy)
 	}
 }
@@ -466,14 +488,15 @@ func TestSession_DestroyProviderError(t *testing.T) {
 func TestSession_Destroy(t *testing.T) {
 	s := New(Config{})
 	provider := new(mockProvider)
-	s.SetProvider(provider)
+
+	if err := s.SetProvider(provider); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
 
 	ctx := new(fasthttp.RequestCtx)
 	ctx.Request.Header.SetCookie(s.config.CookieName, "asd2324n")
 
-	err := s.Destroy(ctx)
-
-	if err != nil {
+	if err := s.Destroy(ctx); err != nil {
 		t.Errorf("Unexpected error: %v", err)
 	}
 }
diff --git a/store_test.go b/store_test.go
index 81121f0..00df2ca 100644
--- a/store_test.go
+++ b/store_test.go
@@ -97,7 +97,9 @@ func TestStore_SetGetHasExpiration(t *testing.T) {
 
 	expiration := 10 * time.Second
 
-	store.SetExpiration(expiration)
+	if err := store.SetExpiration(expiration); err != nil {
+		t.Errorf("unexpected error: %v", err)
+	}
 
 	if v := store.GetExpiration(); v != expiration {
 		t.Errorf("Store.GetExpiration() == %d, want %d", v, expiration)
diff --git a/types.go b/types.go
index b2da925..1b1a47f 100644
--- a/types.go
+++ b/types.go
@@ -71,7 +71,7 @@ type Session struct {
 	cookie   *cookie
 	log      Logger
 
-	storePool  *sync.Pool
+	storePool  sync.Pool
 	stopGCChan chan struct{}
 }