diff --git a/authentication_test.go b/authentication_test.go
new file mode 100644
index 0000000..850cd1b
--- /dev/null
+++ b/authentication_test.go
@@ -0,0 +1,68 @@
+package jira
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"testing"
+)
+
+func TestAcquireSessionCookie_Success(t *testing.T) {
+	setup()
+	defer teardown()
+	testMux.HandleFunc("/rest/auth/1/session", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "POST")
+		testRequestURL(t, r, "/rest/auth/1/session")
+		b, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			t.Errorf("Error in read body: %s", err)
+		}
+		if bytes.Index(b, []byte(`"username":"foo"`)) < 0 {
+			t.Error("No username found")
+		}
+		if bytes.Index(b, []byte(`"password":"bar"`)) < 0 {
+			t.Error("No password found")
+		}
+
+		// Emulate error
+		w.WriteHeader(http.StatusInternalServerError)
+	})
+
+	res, err := testClient.Authentication.AcquireSessionCookie("foo", "bar")
+	if err == nil {
+		t.Errorf("Expected error, but no error given")
+	}
+	if res == true {
+		t.Error("Expected error, but result was true")
+	}
+}
+
+func TestAcquireSessionCookie_Fail(t *testing.T) {
+	setup()
+	defer teardown()
+	testMux.HandleFunc("/rest/auth/1/session", func(w http.ResponseWriter, r *http.Request) {
+		testMethod(t, r, "POST")
+		testRequestURL(t, r, "/rest/auth/1/session")
+		b, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			t.Errorf("Error in read body: %s", err)
+		}
+		if bytes.Index(b, []byte(`"username":"foo"`)) < 0 {
+			t.Error("No username found")
+		}
+		if bytes.Index(b, []byte(`"password":"bar"`)) < 0 {
+			t.Error("No password found")
+		}
+
+		fmt.Fprint(w, `{"session":{"name":"JSESSIONID","value":"12345678901234567890"},"loginInfo":{"failedLoginCount":10,"loginCount":127,"lastFailedLoginTime":"2016-03-16T04:22:35.386+0000","previousLoginTime":"2016-03-16T04:22:35.386+0000"}}`)
+	})
+
+	res, err := testClient.Authentication.AcquireSessionCookie("foo", "bar")
+	if err != nil {
+		t.Errorf("No error expected. Got %s", err)
+	}
+	if res == false {
+		t.Error("Expected result was true. Got false")
+	}
+}
diff --git a/jira_test.go b/jira_test.go
index 8aaa3b8..33dd63d 100644
--- a/jira_test.go
+++ b/jira_test.go
@@ -45,6 +45,18 @@ func teardown() {
 	testServer.Close()
 }
 
+func testMethod(t *testing.T, r *http.Request, want string) {
+	if got := r.Method; got != want {
+		t.Errorf("Request method: %v, want %v", got, want)
+	}
+}
+
+func testRequestURL(t *testing.T, r *http.Request, want string) {
+	if got := r.URL.String(); got != want {
+		t.Errorf("Request URL: %v, want %v", got, want)
+	}
+}
+
 func TestNewClient_WrongUrl(t *testing.T) {
 	c, err := NewClient(nil, "://issues.apache.org/jira/")