diff --git a/client/client_test.go b/client/client_test.go
new file mode 100644
index 0000000..f7c2ed5
--- /dev/null
+++ b/client/client_test.go
@@ -0,0 +1,58 @@
+package client
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func readRequestBodyAsJson(req *http.Request, body *map[string]interface{}) (err error) {
+	bodyBytes, err := ioutil.ReadAll(req.Body)
+	defer req.Body.Close()
+	err = json.Unmarshal(bodyBytes, body)
+	return
+}
+
+func writeResponseBodyAsJson(w http.ResponseWriter, body map[string]interface{}) (err error) {
+	bodyBytes, err := json.Marshal(body)
+	fmt.Fprintln(w, string(bodyBytes))
+	return
+}
+
+func TestClientAuthenticates(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		var body map[string]interface{}
+		err := readRequestBodyAsJson(req, &body)
+
+		assert.Equal(t, req.Method, http.MethodPost)
+		assert.Equal(t, req.RequestURI, "/api/auth")
+		assert.NotNil(t, req.Header["Content-Type"])
+		assert.NotNil(t, req.Header["Content-Type"][0])
+		assert.Equal(t, req.Header["Content-Type"][0], "application/json")
+		assert.Nil(t, err)
+		assert.NotNil(t, body["Username"])
+		assert.Equal(t, body["Username"], "admin")
+		assert.NotNil(t, body["Password"])
+		assert.Equal(t, body["Password"], "a")
+
+		writeResponseBodyAsJson(w, map[string]interface{}{
+			"jwt": "somerandomtoken",
+		})
+	}))
+	defer ts.Close()
+
+	customClient, err := NewClient(ts.Client(), Config{
+		Url:      ts.URL,
+		User:     "admin",
+		Password: "a",
+	})
+	assert.Nil(t, err)
+	token, err := customClient.Authenticate()
+	assert.Nil(t, err)
+	assert.Equal(t, token, "somerandomtoken")
+}