diff --git a/internal/controller/runtime/runtime_controller_test.go b/internal/controller/runtime/runtime_controller_test.go
index ba8bd095..84852e3a 100644
--- a/internal/controller/runtime/runtime_controller_test.go
+++ b/internal/controller/runtime/runtime_controller_test.go
@@ -70,11 +70,85 @@ var _ = Describe("Runtime Controller", func() {
 
 			}, time.Second*300, time.Second*3).Should(BeTrue())
 
+			By("Wait for Runtime to process shoot creation process and finish processing in Ready State")
+
+			// should go into Pending Processing state
+			Eventually(func() bool {
+				runtime := imv1.Runtime{}
+				err := k8sClient.Get(ctx, typeNamespacedName, &runtime)
+				if err != nil {
+					return false
+				}
+
+				// check state
+				if runtime.Status.State != imv1.RuntimeStatePending {
+					return false
+				}
+
+				if !runtime.IsConditionSetWithStatus(imv1.ConditionTypeRuntimeProvisioned, imv1.ConditionReasonShootCreationPending, "Unknown") {
+					return false
+				}
+
+				return true
+			}, time.Second*300, time.Second*3).Should(BeTrue())
+
+			// and end as Ready state with ConfigurationCompleted condition == True
+			Eventually(func() bool {
+				runtime := imv1.Runtime{}
+				err := k8sClient.Get(ctx, typeNamespacedName, &runtime)
+
+				if err != nil {
+					return false
+				}
+
+				// check state
+				if runtime.Status.State != imv1.RuntimeStateReady {
+					return false
+				}
+
+				if !runtime.IsConditionSet(imv1.ConditionTypeRuntimeProvisioned, imv1.ConditionReasonConfigurationCompleted) {
+					return false
+				}
+
+				return true
+			}, time.Second*300, time.Second*3).Should(BeTrue())
+
+			Expect(customTracker.IsSequenceFullyUsed()).To(BeTrue())
+
+			By("Wait for Runtime to process shoot update process and finish processing in Ready State")
+			setupGardenerTestClientForUpdate()
+
 			runtime := imv1.Runtime{}
+			err := k8sClient.Get(ctx, typeNamespacedName, &runtime)
+
+			Expect(err).To(BeNil())
 
-			By("Wait for Runtime to process shoot creation process and end in ready State")
+			runtime.Spec.Shoot.Provider.Workers[0].Maximum = 5
+			Expect(k8sClient.Update(ctx, &runtime)).To(Succeed())
+
+			// should go into Pending Processing state
 			Eventually(func() bool {
+				runtime := imv1.Runtime{}
+				err := k8sClient.Get(ctx, typeNamespacedName, &runtime)
+				if err != nil {
+					return false
+				}
+
+				// check state
+				if runtime.Status.State != imv1.RuntimeStatePending {
+					return false
+				}
 
+				if !runtime.IsConditionSetWithStatus(imv1.ConditionTypeRuntimeProvisioned, imv1.ConditionReasonProcessing, "Unknown") {
+					return false
+				}
+
+				return true
+			}, time.Second*300, time.Second*3).Should(BeTrue())
+
+			// and end as Ready state with ConfigurationCompleted condition == True
+			Eventually(func() bool {
+				runtime := imv1.Runtime{}
 				err := k8sClient.Get(ctx, typeNamespacedName, &runtime)
 
 				if err != nil {
@@ -85,7 +159,6 @@ var _ = Describe("Runtime Controller", func() {
 				if runtime.Status.State != imv1.RuntimeStateReady {
 					return false
 				}
-				// check conditions
 
 				if !runtime.IsConditionSet(imv1.ConditionTypeRuntimeProvisioned, imv1.ConditionReasonConfigurationCompleted) {
 					return false
@@ -118,7 +191,8 @@ func CreateRuntimeStub(resourceName string) *imv1.Runtime {
 					Type: "aws",
 					Workers: []gardener.Worker{
 						{
-							Zones: []string{""},
+							Zones:   []string{""},
+							Maximum: 1,
 						},
 					},
 				},
diff --git a/internal/controller/runtime/suite_test.go b/internal/controller/runtime/suite_test.go
index e03b72d9..22bf7a36 100644
--- a/internal/controller/runtime/suite_test.go
+++ b/internal/controller/runtime/suite_test.go
@@ -144,6 +144,27 @@ func setupGardenerTestClientForProvisioning() {
 	runtimeReconciler.UpdateShootClient(gardenerTestClient)
 }
 
+func setupGardenerTestClientForUpdate() {
+	runtimeStub := CreateRuntimeStub("test-resource")
+	converterConfig := fixConverterConfigForTests()
+	converter := gardener_shoot.NewConverter(converterConfig)
+	convertedShoot, err := converter.ToShoot(*runtimeStub)
+	if err != nil {
+		panic(err)
+	}
+
+	shoots := fixGardenerShootsForUpdate(&convertedShoot)
+
+	clientScheme := runtime.NewScheme()
+	_ = gardener_api.AddToScheme(clientScheme)
+
+	tracker := clienttesting.NewObjectTracker(clientScheme, serializer.NewCodecFactory(clientScheme).UniversalDecoder())
+	customTracker = NewCustomTracker(tracker, shoots)
+	gardenerTestClient = fake.NewClientBuilder().WithScheme(clientScheme).WithObjectTracker(customTracker).Build()
+
+	runtimeReconciler.UpdateShootClient(gardenerTestClient)
+}
+
 // func setupGardenerTestClientForDeleting() {
 //	runtimeStub := CreateRuntimeStub("test-resource")
 //	converterConfig := fixConverterConfigForTests()
@@ -190,6 +211,34 @@ func fixGardenerShootsForProvisioning(shoot *gardener_api.Shoot) []*gardener_api
 	return []*gardener_api.Shoot{missingShoot, missingShoot, missingShoot, initialisedShoot, dnsShoot, pendingShoot, processingShoot, readyShoot, readyShoot}
 }
 
+func fixGardenerShootsForUpdate(shoot *gardener_api.Shoot) []*gardener_api.Shoot {
+
+	pendingShoot := shoot.DeepCopy()
+
+	pendingShoot.Spec.DNS = &gardener_api.DNS{
+		Domain: ptrTo("test.domain"),
+	}
+
+	pendingShoot.Status = gardener_api.ShootStatus{
+		LastOperation: &gardener_api.LastOperation{
+			Type:  gardener_api.LastOperationTypeReconcile,
+			State: gardener_api.LastOperationStatePending,
+		},
+	}
+
+	processingShoot := pendingShoot.DeepCopy()
+
+	processingShoot.Status.LastOperation.State = gardener_api.LastOperationStateProcessing
+
+	readyShoot := processingShoot.DeepCopy()
+
+	readyShoot.Status.LastOperation.State = gardener_api.LastOperationStateSucceeded
+
+	// processedShoot := processingShoot.DeepCopy() // will add specific data later
+
+	return []*gardener_api.Shoot{pendingShoot, processingShoot, readyShoot, readyShoot}
+}
+
 func fixConverterConfigForTests() gardener_shoot.ConverterConfig {
 	return gardener_shoot.ConverterConfig{
 		Kubernetes: gardener_shoot.KubernetesConfig{
diff --git a/internal/controller/runtime/test_client_obj_tracker.go b/internal/controller/runtime/test_client_obj_tracker.go
index 8ebe35a2..9c2115ab 100644
--- a/internal/controller/runtime/test_client_obj_tracker.go
+++ b/internal/controller/runtime/test_client_obj_tracker.go
@@ -12,6 +12,7 @@ import (
 )
 
 // CustomTracker implements ObjectTracker with a sequence of Shoot objects
+// it will be updated with a different shoot sequence for each test case
 type CustomTracker struct {
 	clienttesting.ObjectTracker
 	shootSequence []*gardener_api.Shoot