diff --git a/stackit/internal/services/resourcemanager/project/resource.go b/stackit/internal/services/resourcemanager/project/resource.go
index 3ae6f2c2..e572e74c 100644
--- a/stackit/internal/services/resourcemanager/project/resource.go
+++ b/stackit/internal/services/resourcemanager/project/resource.go
@@ -229,7 +229,7 @@ func (r *projectResource) Create(ctx context.Context, req resource.CreateRequest
 // Read refreshes the Terraform state with the latest data.
 func (r *projectResource) Read(ctx context.Context, req resource.ReadRequest, resp *resource.ReadResponse) { // nolint:gocritic // function signature required by Terraform
 	var model Model
-	diags := req.State.Get(ctx, model)
+	diags := req.State.Get(ctx, &model)
 	resp.Diagnostics.Append(diags...)
 	if resp.Diagnostics.HasError() {
 		return
diff --git a/stackit/internal/services/resourcemanager/resourcemanager_acc_test.go b/stackit/internal/services/resourcemanager/resourcemanager_acc_test.go
index 76dda43e..7afee30b 100644
--- a/stackit/internal/services/resourcemanager/resourcemanager_acc_test.go
+++ b/stackit/internal/services/resourcemanager/resourcemanager_acc_test.go
@@ -23,7 +23,11 @@ var projectResource = map[string]string{
 	"new_label":           "a-label",
 }
 
-func resourceConfig(name, label string) string {
+func resourceConfig(name string, label *string) string {
+	labelConfig := ""
+	if label != nil {
+		labelConfig = fmt.Sprintf("new_label = %q", *label)
+	}
 	return fmt.Sprintf(`
 				%s
 
@@ -41,7 +45,7 @@ func resourceConfig(name, label string) string {
 		projectResource["parent_container_id"],
 		name,
 		projectResource["billing_reference"],
-		label,
+		labelConfig,
 		testutil.TestProjectServiceAccountEmail,
 	)
 }
@@ -53,7 +57,7 @@ func TestAccResourceManagerResource(t *testing.T) {
 		Steps: []resource.TestStep{
 			// Creation
 			{
-				Config: resourceConfig(projectResource["name"], ""),
+				Config: resourceConfig(projectResource["name"], nil),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					// Project data
 					resource.TestCheckResourceAttrSet("stackit_resourcemanager_project.project", "container_id"),
@@ -71,7 +75,7 @@ func TestAccResourceManagerResource(t *testing.T) {
 					data "stackit_resourcemanager_project" "project" {
 						container_id = stackit_resourcemanager_project.project.container_id
 					}`,
-					resourceConfig(projectResource["name"], ""),
+					resourceConfig(projectResource["name"], nil),
 				),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					// Project data
@@ -108,7 +112,7 @@ func TestAccResourceManagerResource(t *testing.T) {
 			},
 			// Update
 			{
-				Config: resourceConfig(fmt.Sprintf("%s-new", projectResource["name"]), "new_label='a-label'"),
+				Config: resourceConfig(fmt.Sprintf("%s-new", projectResource["name"]), utils.Ptr("a-label")),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					// Project data
 					resource.TestCheckResourceAttrSet("stackit_resourcemanager_project.project", "container_id"),
@@ -156,15 +160,20 @@ func testAccCheckResourceManagerDestroy(s *terraform.State) error {
 
 	items := *projectsResp.Items
 	for i := range items {
-		if utils.Contains(projectsToDestroy, *items[i].ContainerId) {
-			err := client.DeleteProjectExecute(ctx, *items[i].ContainerId)
-			if err != nil {
-				return fmt.Errorf("destroying project %s during CheckDestroy: %w", *items[i].ContainerId, err)
-			}
-			_, err = wait.DeleteProjectWaitHandler(ctx, client, *items[i].ContainerId).WaitWithContext(ctx)
-			if err != nil {
-				return fmt.Errorf("destroying project %s during CheckDestroy: waiting for deletion %w", *items[i].ContainerId, err)
-			}
+		if *items[i].LifecycleState == resourcemanager.LIFECYCLESTATE_DELETING {
+			continue
+		}
+		if !utils.Contains(projectsToDestroy, *items[i].ContainerId) {
+			continue
+		}
+
+		err := client.DeleteProjectExecute(ctx, *items[i].ContainerId)
+		if err != nil {
+			return fmt.Errorf("destroying project %s during CheckDestroy: %w", *items[i].ContainerId, err)
+		}
+		_, err = wait.DeleteProjectWaitHandler(ctx, client, *items[i].ContainerId).WaitWithContext(ctx)
+		if err != nil {
+			return fmt.Errorf("destroying project %s during CheckDestroy: waiting for deletion %w", *items[i].ContainerId, err)
 		}
 	}
 	return nil
diff --git a/stackit/internal/services/ske/ske_acc_test.go b/stackit/internal/services/ske/ske_acc_test.go
index b14c8ef0..8c3e0cf9 100644
--- a/stackit/internal/services/ske/ske_acc_test.go
+++ b/stackit/internal/services/ske/ske_acc_test.go
@@ -33,8 +33,8 @@ var clusterResource = map[string]string{
 	"nodepool_name":                                    "np-acc-test",
 	"nodepool_name_min":                                "np-acc-min-test",
 	"nodepool_machine_type":                            "b1.2",
-	"nodepool_os_version":                              "3510.2.5",
-	"nodepool_os_version_min":                          "3510.2.5",
+	"nodepool_os_version":                              "3602.2.1",
+	"nodepool_os_version_min":                          "3602.2.1",
 	"nodepool_os_name":                                 "flatcar",
 	"nodepool_minimum":                                 "2",
 	"nodepool_maximum":                                 "3",
@@ -60,6 +60,7 @@ var clusterResource = map[string]string{
 	"maintenance_enable_machine_image_version_updates": "true",
 	"maintenance_start":                                "01:23:45Z",
 	"maintenance_end":                                  "05:00:00+02:00",
+	"maintenance_end_new":                              "03:03:03+00:00",
 }
 
 func getConfig(version string, apc *bool, maintenanceEnd *string) string {
@@ -145,6 +146,12 @@ func getConfig(version string, apc *bool, maintenanceEnd *string) string {
 				max_surge = "%s"
 				availability_zones = ["%s"]
 			}]
+			maintenance = {
+				enable_kubernetes_version_updates = %s
+				enable_machine_image_version_updates = %s
+				start = "%s"
+				end = "%s"
+			}
 		}
 		`,
 		testutil.SKEProviderConfig(),
@@ -191,6 +198,10 @@ func getConfig(version string, apc *bool, maintenanceEnd *string) string {
 		clusterResource["nodepool_maximum"],
 		clusterResource["nodepool_max_surge"],
 		clusterResource["nodepool_zone"],
+		clusterResource["maintenance_enable_kubernetes_version_updates"],
+		clusterResource["maintenance_enable_machine_image_version_updates"],
+		clusterResource["maintenance_start"],
+		maintenanceEndTF,
 	)
 }
 
@@ -448,13 +459,13 @@ func TestAccSKE(t *testing.T) {
 			},
 			// 6) Update kubernetes version and maximum
 			{
-				Config: getConfig("1.25.12", nil, utils.Ptr("03:03:03+00:00")),
+				Config: getConfig(clusterResource["kubernetes_version_new"], nil, utils.Ptr(clusterResource["maintenance_end_new"])),
 				Check: resource.ComposeAggregateTestCheckFunc(
 					// cluster data
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "project_id", clusterResource["project_id"]),
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "name", clusterResource["name"]),
-					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "kubernetes_version", "1.25"),
-					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "kubernetes_version_used", "1.25.12"),
+					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "kubernetes_version", clusterResource["kubernetes_version_new"]),
+					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "kubernetes_version_used", clusterResource["kubernetes_version_used_new"]),
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "node_pools.0.name", clusterResource["nodepool_name"]),
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "node_pools.0.availability_zones.#", "1"),
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "node_pools.0.availability_zones.0", clusterResource["nodepool_zone"]),
@@ -485,7 +496,7 @@ func TestAccSKE(t *testing.T) {
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "maintenance.enable_kubernetes_version_updates", clusterResource["maintenance_enable_kubernetes_version_updates"]),
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "maintenance.enable_machine_image_version_updates", clusterResource["maintenance_enable_machine_image_version_updates"]),
 					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "maintenance.start", clusterResource["maintenance_start"]),
-					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "maintenance.end", "03:03:03+00:00"),
+					resource.TestCheckResourceAttr("stackit_ske_cluster.cluster", "maintenance.end", clusterResource["maintenance_end_new"]),
 
 					resource.TestCheckResourceAttrSet("stackit_ske_cluster.cluster", "kube_config"),
 				),
diff --git a/stackit/internal/testutil/testutil.go b/stackit/internal/testutil/testutil.go
index 2c9d4792..7364c1fe 100644
--- a/stackit/internal/testutil/testutil.go
+++ b/stackit/internal/testutil/testutil.go
@@ -86,7 +86,7 @@ func DnsProviderConfig() string {
 }
 
 func LoadBalancerProviderConfig() string {
-	if LogMeCustomEndpoint == "" {
+	if LoadBalancerCustomEndpoint == "" {
 		return `
 		provider "stackit" {
 			region = "eu01"