diff --git a/soap.go b/soap.go
index ab4932f..f28c3b7 100644
--- a/soap.go
+++ b/soap.go
@@ -82,7 +82,7 @@ func (c *Client) waitAndRefreshDefinitions(d time.Duration) {
 }
 
 func (c *Client) initWsdl() {
-	c.Definitions, c.definitionsErr = getWsdlDefinitions(c.wsdl)
+	c.Definitions, c.definitionsErr = c.getWsdlDefinitions()
 	if c.definitionsErr == nil {
 		c.URL = strings.TrimSuffix(c.Definitions.TargetNamespace, "/")
 	}
diff --git a/soap_test.go b/soap_test.go
index 0664fe5..066df80 100644
--- a/soap_test.go
+++ b/soap_test.go
@@ -153,7 +153,7 @@ func TestClient_Call(t *testing.T) {
 		t.Errorf("error: %+v", rw)
 	}
 
-	c := &Client{}
+	c := &Client{HttpClient: http.DefaultClient}
 	res, err = c.Call("", Params{})
 	if err == nil {
 		t.Errorf("error expected but nothing got.")
diff --git a/wsdl.go b/wsdl.go
index 3e7bc85..d0812a4 100644
--- a/wsdl.go
+++ b/wsdl.go
@@ -2,11 +2,12 @@ package gosoap
 
 import (
 	"encoding/xml"
-	"golang.org/x/net/html/charset"
 	"io"
 	"net/http"
 	"net/url"
 	"os"
+
+	"golang.org/x/net/html/charset"
 )
 
 type wsdlDefinitions struct {
@@ -155,28 +156,41 @@ type xsdMaxInclusive struct {
 	Value string `xml:"value,attr"`
 }
 
-func getWsdlBody(u string) (reader io.ReadCloser, err error) {
-	parse, err := url.Parse(u)
+func (c *Client) getWsdlBody() (reader io.ReadCloser, err error) {
+	parse, err := url.Parse(c.wsdl)
 	if err != nil {
 		return nil, err
 	}
+
 	if parse.Scheme == "file" {
 		outFile, err := os.Open(parse.Path)
 		if err != nil {
 			return nil, err
 		}
+
 		return outFile, nil
 	}
-	r, err := http.Get(u)
+
+	req, err := http.NewRequest("GET", c.wsdl, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	if c.Username != "" && c.Password != "" {
+		req.SetBasicAuth(c.Username, c.Password)
+	}
+
+	resp, err := c.HttpClient.Do(req)
 	if err != nil {
 		return nil, err
 	}
-	return r.Body, nil
+
+	return resp.Body, nil
 }
 
 // getWsdlDefinitions sent request to the wsdl url and set definitions on struct
-func getWsdlDefinitions(u string) (wsdl *wsdlDefinitions, err error) {
-	reader, err := getWsdlBody(u)
+func (c *Client) getWsdlDefinitions() (wsdl *wsdlDefinitions, err error) {
+	reader, err := c.getWsdlBody()
 	if err != nil {
 		return nil, err
 	}
@@ -203,6 +217,7 @@ func (wsdl *wsdlDefinitions) GetSoapActionFromWsdlOperation(operation string) st
 			}
 		}
 	}
+
 	return ""
 }
 
diff --git a/wsdl_test.go b/wsdl_test.go
index c826592..065cba1 100644
--- a/wsdl_test.go
+++ b/wsdl_test.go
@@ -2,6 +2,7 @@ package gosoap
 
 import (
 	"fmt"
+	"net/http"
 	"os"
 	"testing"
 )
@@ -49,7 +50,13 @@ func Test_getWsdlBody(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			_, err := getWsdlBody(tt.args.u)
+			c := Client{
+				HttpClient: http.DefaultClient,
+				wsdl:       tt.args.u,
+			}
+
+			_, err := c.getWsdlBody()
+
 			if (err != nil) != tt.wantErr {
 				t.Errorf("getwsdlBody() error = %v, wantErr %v", err, tt.wantErr)
 				return