diff --git a/go.mod b/go.mod
index 2328338..a6e3b87 100644
--- a/go.mod
+++ b/go.mod
@@ -6,10 +6,14 @@ require git.rinsvent.ru/rinsvent/gol v0.0.0-20240921094550-1489c64a01e7
 
 require (
 	github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/getsentry/raven-go v0.2.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.9.0 // indirect
 	github.com/tchap/zapext v1.0.0 // indirect
 	go.uber.org/multierr v1.10.0 // indirect
 	go.uber.org/zap v1.27.0 // indirect
 	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
diff --git a/go.sum b/go.sum
index 3e2eadd..1b71027 100644
--- a/go.sum
+++ b/go.sum
@@ -2,15 +2,24 @@ git.rinsvent.ru/rinsvent/gol v0.0.0-20240921094550-1489c64a01e7 h1:RASDTYghzGaJv
 git.rinsvent.ru/rinsvent/gol v0.0.0-20240921094550-1489c64a01e7/go.mod h1:U9bes/stAbl7rZ+3rZRCq2GcmzZIUAk6xgE4l8zis9o=
 github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d h1:S2NE3iHSwP0XV47EEXL8mWmRdEfGscSJ+7EgePNgt0s=
 github.com/certifi/gocertifi v0.0.0-20210507211836-431795d63e8d/go.mod h1:sGbDF6GwGcLpkNXPUTkMRoywsNa/ol15pxFe6ERfguA=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/getsentry/raven-go v0.2.0 h1:no+xWJRb5ZI7eE8TWgIq1jLulQiIoLG0IfYxv5JYMGs=
 github.com/getsentry/raven-go v0.2.0/go.mod h1:KungGk8q33+aIAZUIVWZDr2OfAEBsO49PX4NzFV5kcQ=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/tchap/zapext v1.0.0 h1:qPxfRLzqYzemT+Pgs5VoH8NGU5YS7cgCnhcqRGkmrXc=
 github.com/tchap/zapext v1.0.0/go.mod h1:0VgDSQ0xHJRqkxrwu3G2i2762jSnAJMz7rYxiZGpW1U=
 go.uber.org/multierr v1.10.0 h1:S0h4aNzvfcFsC3dRF1jLoaov7oRaKqRGC/pUEJ2yvPQ=
 go.uber.org/multierr v1.10.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8=
 go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
 gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/thread_test.go b/thread_test.go
new file mode 100644
index 0000000..14bad28
--- /dev/null
+++ b/thread_test.go
@@ -0,0 +1,80 @@
+package thread
+
+import (
+	"context"
+	"github.com/stretchr/testify/assert"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"testing"
+	"time"
+)
+
+type report struct {
+	rw   sync.Mutex
+	text string
+}
+
+func (r *report) log(text string) {
+	r.rw.Lock()
+	defer r.rw.Unlock()
+	r.text += text
+}
+
+func (r *report) String() string {
+	return r.text
+}
+
+func Test_checkManager(t *testing.T) {
+	var count atomic.Int32
+	var r report
+	var wg sync.WaitGroup
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+
+		r.log("Start manger\n")
+
+		manager := Manager{Count: 3}
+		go manager.Start(func() {
+			number := count.Add(1)
+			r.log("Start " + strconv.Itoa(int(number)) + "\n")
+			switch number {
+			case 1:
+				<-ctx.Done()
+				time.Sleep(100 * time.Millisecond)
+			case 2:
+				time.Sleep(100 * time.Millisecond)
+			case 3:
+				time.Sleep(200 * time.Millisecond)
+			case 4:
+				time.Sleep(200 * time.Millisecond)
+			case 5:
+				<-ctx.Done()
+				time.Sleep(200 * time.Millisecond)
+			case 6:
+				<-ctx.Done()
+				time.Sleep(300 * time.Millisecond)
+			default:
+				<-ctx.Done()
+				time.Sleep(400 * time.Millisecond)
+			}
+			r.log("Finish " + strconv.Itoa(int(number)) + "\n")
+		})
+
+		r.log("Wait cancel\n")
+		manager.Wait(ctx)
+		r.log("Finish manger\n")
+	}()
+
+	time.Sleep(1 * time.Second)
+	cancel()
+
+	wg.Wait()
+
+	assert.Equal(t, int32(6), count.Load())
+	assert.Equal(t, "Start manger\nWait cancel\nStart 1\nStart 2\nStart 3\nFinish 2\nStart 4\nFinish 3\nStart 5\nFinish 4\nStart 6\nFinish 1\nFinish 5\nFinish 6\nFinish manger\n", r.String())
+}