public async Task DecodeRefreshToken() {
			var refreshTokenSource = new TaskCompletionSource<string>();
			Handle(AuthorizationServerDescription.AuthorizationEndpoint).By(
				async (req, ct) => {
					var server = new AuthorizationServer(AuthorizationServerMock);
					var request = await server.ReadAuthorizationRequestAsync(req, ct);
					Assert.That(request, Is.Not.Null);
					var response = server.PrepareApproveAuthorizationRequest(request, ResourceOwnerUsername);
					return await server.Channel.PrepareResponseAsync(response);
				});
			Handle(AuthorizationServerDescription.TokenEndpoint).By(
				async (req, ct) => {
					var server = new AuthorizationServer(AuthorizationServerMock);
					var response = await server.HandleTokenRequestAsync(req, ct);
					var authorization = server.DecodeRefreshToken(refreshTokenSource.Task.Result);
					Assert.That(authorization, Is.Not.Null);
					Assert.That(authorization.User, Is.EqualTo(ResourceOwnerUsername));
					return response;
				});

			var client = new WebServerClient(AuthorizationServerDescription);
			try {
				var authState = new AuthorizationState(TestScopes) { Callback = ClientCallback, };
				var authRedirectResponse = await client.PrepareRequestUserAuthorizationAsync(authState);
				this.HostFactories.CookieContainer.SetCookies(authRedirectResponse, ClientCallback);
				Uri authCompleteUri;
				using (var httpClient = this.HostFactories.CreateHttpClient()) {
					using (var response = await httpClient.GetAsync(authRedirectResponse.Headers.Location)) {
						response.EnsureSuccessStatusCode();
						authCompleteUri = response.Headers.Location;
					}
				}

				var authCompleteRequest = new HttpRequestMessage(HttpMethod.Get, authCompleteUri);
				this.HostFactories.CookieContainer.ApplyCookies(authCompleteRequest);
				var result = await client.ProcessUserAuthorizationAsync(authCompleteRequest);
				Assert.That(result.AccessToken, Is.Not.Null.And.Not.Empty);
				Assert.That(result.RefreshToken, Is.Not.Null.And.Not.Empty);
				refreshTokenSource.SetResult(result.RefreshToken);
			} catch {
				refreshTokenSource.TrySetCanceled();
			}
		}