diff --git a/mtglib/network/proxy_dialer_internal_test.go b/mtglib/network/proxy_dialer_internal_test.go
new file mode 100644
index 0000000..42c18fb
--- /dev/null
+++ b/mtglib/network/proxy_dialer_internal_test.go
@@ -0,0 +1,96 @@
+package network
+
+import (
+	"fmt"
+	"net/url"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type ProxyDialerTestSuite struct {
+	suite.Suite
+
+	u *url.URL
+}
+
+func (suite *ProxyDialerTestSuite) SetupSuite() {
+	u, _ := url.Parse("socks5://hello:world@10.0.0.10:3128")
+	suite.u = u
+}
+
+func (suite *ProxyDialerTestSuite) TestSetupDefaults() {
+	d := newProxyDialer(&DialerMock{}, suite.u).(*circuitBreakerDialer)
+
+	suite.EqualValues(ProxyDialerOpenThreshold, d.openThreshold)
+	suite.EqualValues(ProxyDialerHalfOpenTimeout, d.halfOpenTimeout)
+	suite.EqualValues(ProxyDialerResetFailuresTimeout, d.resetFailuresTimeout)
+}
+
+func (suite *ProxyDialerTestSuite) TestSetupValuesAllOk() {
+	query := url.Values{}
+
+	query.Set("open_threshold", "30")
+	query.Set("reset_failures_timeout", "1s")
+	query.Set("half_open_timeout", "2s")
+
+	suite.u.RawQuery = query.Encode()
+	d := newProxyDialer(&DialerMock{}, suite.u).(*circuitBreakerDialer)
+
+	suite.EqualValues(30, d.openThreshold)
+	suite.EqualValues(2*time.Second, d.halfOpenTimeout)
+	suite.EqualValues(time.Second, d.resetFailuresTimeout)
+}
+
+func (suite *ProxyDialerTestSuite) TestOpenThreshold() {
+	query := url.Values{}
+	params := []string{"-30", "aaa", "1.0", "-1.0"}
+
+	for _, v := range params {
+		suite.T().Run(fmt.Sprintf("param=%s", v), func(t *testing.T) {
+			query.Set("open_threshold", v)
+
+			suite.u.RawQuery = query.Encode()
+			d := newProxyDialer(&DialerMock{}, suite.u).(*circuitBreakerDialer)
+
+			suite.EqualValues(ProxyDialerOpenThreshold, d.openThreshold)
+		})
+	}
+}
+
+func (suite *ProxyDialerTestSuite) TestHalfOpenTimeout() {
+	query := url.Values{}
+	params := []string{"-30", "30", "aaa", "-3.0", "3.0"}
+
+	for _, v := range params {
+		suite.T().Run(fmt.Sprintf("param=%s", v), func(t *testing.T) {
+			query.Set("half_open_timeout", v)
+
+			suite.u.RawQuery = query.Encode()
+			d := newProxyDialer(&DialerMock{}, suite.u).(*circuitBreakerDialer)
+
+			suite.EqualValues(ProxyDialerHalfOpenTimeout, d.halfOpenTimeout)
+		})
+	}
+}
+
+func (suite *ProxyDialerTestSuite) TestResetFailuresTimeout() {
+	query := url.Values{}
+	params := []string{"-30", "30", "aaa", "-3.0", "3.0"}
+
+	for _, v := range params {
+		suite.T().Run(fmt.Sprintf("param=%s", v), func(t *testing.T) {
+			query.Set("reset_failures_timeout", v)
+
+			suite.u.RawQuery = query.Encode()
+			d := newProxyDialer(&DialerMock{}, suite.u).(*circuitBreakerDialer)
+
+			suite.EqualValues(ProxyDialerHalfOpenTimeout, d.halfOpenTimeout)
+		})
+	}
+}
+
+func TestProxyDialer(t *testing.T) {
+	suite.Run(t, &ProxyDialerTestSuite{})
+}