diff --git a/controllers/suite_test.go b/controllers/suite_test.go
index b7a33b60..2415299f 100644
--- a/controllers/suite_test.go
+++ b/controllers/suite_test.go
@@ -63,6 +63,11 @@ var secretNamespacedName = types.NamespacedName{
 
 var rndm = rand.New(rand.NewSource(GinkgoRandomSeed()))
 
+// TODO:
+//   - Find a different way to create an ephemeral webhook URL as a more reliable solution.
+//     Perhaps, use smee client to create a new channel per test run.
+var webhookURL = "https://smee.io/PZeBPogfii2vPl6s"
+
 func TestControllersAPIs(t *testing.T) {
 	RegisterFailHandler(Fail)
 
diff --git a/controllers/workspace_controller_notifications_test.go b/controllers/workspace_controller_notifications_test.go
index 644972b0..ce6e0cd6 100644
--- a/controllers/workspace_controller_notifications_test.go
+++ b/controllers/workspace_controller_notifications_test.go
@@ -86,7 +86,7 @@ var _ = Describe("Workspace controller", Ordered, func() {
 			instance.Spec.Notifications = append(instance.Spec.Notifications, appv1alpha2.Notification{
 				Name: "slack",
 				Type: tfc.NotificationDestinationTypeSlack,
-				URL:  "https://www.hashicorp.com",
+				URL:  webhookURL,
 			})
 			// Create a new Kubernetes workspace object and wait until the controller finishes the reconciliation
 			createWorkspace(instance)
@@ -101,7 +101,7 @@ var _ = Describe("Workspace controller", Ordered, func() {
 			instance.Spec.Notifications = append(instance.Spec.Notifications, appv1alpha2.Notification{
 				Name: "slack",
 				Type: tfc.NotificationDestinationTypeSlack,
-				URL:  "https://www.hashicorp.com",
+				URL:  webhookURL,
 			})
 			instance.Spec.Notifications = append(instance.Spec.Notifications, appv1alpha2.Notification{
 				Name:       "email",
@@ -121,7 +121,7 @@ var _ = Describe("Workspace controller", Ordered, func() {
 			instance.Spec.Notifications = append(instance.Spec.Notifications, appv1alpha2.Notification{
 				Name: "slack",
 				Type: tfc.NotificationDestinationTypeSlack,
-				URL:  "https://www.hashicorp.com",
+				URL:  webhookURL,
 			})
 			// Create a new Kubernetes workspace object and wait until the controller finishes the reconciliation
 			createWorkspace(instance)
diff --git a/controllers/workspace_controller_run_tasks_test.go b/controllers/workspace_controller_run_tasks_test.go
index 23dcb26d..c6d0c5cd 100644
--- a/controllers/workspace_controller_run_tasks_test.go
+++ b/controllers/workspace_controller_run_tasks_test.go
@@ -238,7 +238,7 @@ func isRunTasksReconciled(instance *appv1alpha2.Workspace) {
 func createRunTaskForTest(name string) string {
 	rt, err := tfClient.RunTasks.Create(ctx, organization, tfc.RunTaskCreateOptions{
 		Name:     name,
-		URL:      "https://www.hashicorp.com",
+		URL:      webhookURL,
 		Category: "task", // MUST BE "task"
 		Enabled:  tfc.Bool(true),
 	})