diff --git a/openstack/identity/v3/client_test.go b/openstack/identity/v3/client_test.go
new file mode 100644
index 0000000..7c57e68
--- /dev/null
+++ b/openstack/identity/v3/client_test.go
@@ -0,0 +1,32 @@
+package v3
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/rackspace/gophercloud"
+	"github.com/rackspace/gophercloud/testhelper"
+)
+
+func TestAuthentication(t *testing.T) {
+	testhelper.SetupHTTP()
+	defer testhelper.TeardownHTTP()
+
+	testhelper.Mux.HandleFunc("/v3/auth/tokens", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("X-Subject-Token", "aaaa1111")
+
+		w.WriteHeader(http.StatusCreated)
+		fmt.Fprintf(w, `{ "token": { "expires_at": "2013-02-02T18:30:59.000000Z" } }`)
+	})
+
+	provider := &gophercloud.ProviderClient{
+		IdentityEndpoint: testhelper.Endpoint(),
+	}
+	client := NewClient(provider)
+
+	expected := testhelper.Endpoint() + "v3/"
+	if client.Endpoint != expected {
+		t.Errorf("Expected endpoint to be %s, but was %s", expected, client.Endpoint)
+	}
+}