diff --git a/machine/v1/tests/controlplanemachinesets.machine.openshift.io/MachineAPIMigration.yaml b/machine/v1/tests/controlplanemachinesets.machine.openshift.io/MachineAPIMigration.yaml
new file mode 100644
index 00000000000..3e49b7026c1
--- /dev/null
+++ b/machine/v1/tests/controlplanemachinesets.machine.openshift.io/MachineAPIMigration.yaml
@@ -0,0 +1,534 @@
+apiVersion: apiextensions.k8s.io/v1 # Hack because controller-gen complains if we don't have this
+name: "ControlPlaneMachineSet"
+crdName: controlplanemachinesets.machine.openshift.io
+tests:
+  onCreate:
+    - name: Should reject an VSphere platform failure domain without any VSphere config
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+              failureDomains:
+                platform: VSphere
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.failureDomains: Invalid value: \"object\": vsphere configuration is required when platform is VSphere"
+    - name: Should reject an VSphere configured failure domain without a platform type
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+              failureDomains:
+                vsphere:
+                - name: foo
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.failureDomains.platform: Required value"
+    - name: Should be able to create a minimal ControlPlaneMachineSet
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expected: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+    - name: Should reject a missing machineType
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.template.machineType: Required value"
+    - name: Should reject a missing machines_v1beta1_machine_openshift_io
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+      expectedError: "spec.template: Invalid value: \"object\": machines_v1beta1_machine_openshift_io configuration is required when machineType is machines_v1beta1_machine_openshift_io, and forbidden otherwise"
+    - name: Should reject a worker role label
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: worker
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.metadata.labels: Invalid value: \"object\": label 'machine.openshift.io/cluster-api-machine-role' is required, and must have value 'master'"
+    - name: Should reject a missing role label
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.metadata.labels: Invalid value: \"object\": label 'machine.openshift.io/cluster-api-machine-role' is required, and must have value 'master'"
+    - name: Should reject a worker type label
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: worker
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.metadata.labels: Invalid value: \"object\": label 'machine.openshift.io/cluster-api-machine-type' is required, and must have value 'master'"
+    - name: Should reject a missing type label
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.metadata.labels: Invalid value: \"object\": label 'machine.openshift.io/cluster-api-machine-type' is required, and must have value 'master'"
+    - name: Should reject a missing cluster ID label
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+              spec:
+                providerSpec: {}
+      expectedError: "spec.template.machines_v1beta1_machine_openshift_io.metadata.labels: Invalid value: \"object\": label 'machine.openshift.io/cluster-api-cluster' is required"
+    - name: Should be able to create an Active ControlPlaneMachineSet
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          state: Active
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expected: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Active
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+  onUpdate:
+    - name: Replicas should be immutable
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      updated: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 5
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.replicas: Invalid value: \"integer\": replicas is immutable"
+    - name: Selector should be immutable
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      updated: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+              foo: bar
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.selector: Invalid value: \"object\": selector is immutable"
+    - name: Should default the strategy when removed
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: OnDelete
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      updated: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expected: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+    - name: Should allow the state to change to Active
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      updated: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Active
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expected: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Active
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+    - name: Should not allow the state to change from Active
+      initial: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Active
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      updated: |
+        apiVersion: machine.openshift.io/v1
+        kind: ControlPlaneMachineSet
+        spec:
+          replicas: 3
+          state: Inactive
+          strategy:
+            type: RollingUpdate
+          selector:
+            matchLabels:
+              machine.openshift.io/cluster-api-machine-role: master
+              machine.openshift.io/cluster-api-machine-type: master
+          template:
+            machineType: machines_v1beta1_machine_openshift_io
+            machines_v1beta1_machine_openshift_io:
+              metadata:
+                labels:
+                  machine.openshift.io/cluster-api-machine-role: master
+                  machine.openshift.io/cluster-api-machine-type: master
+                  machine.openshift.io/cluster-api-cluster: cluster
+              spec:
+                providerSpec: {}
+      expectedError: "spec.state: Invalid value: \"string\": state cannot be changed once Active"
+
diff --git a/machine/v1beta1/tests/machines.machine.openshift.io/MachineAPIMigration.yaml b/machine/v1beta1/tests/machines.machine.openshift.io/MachineAPIMigration.yaml
new file mode 100644
index 00000000000..f0e9388d2d8
--- /dev/null
+++ b/machine/v1beta1/tests/machines.machine.openshift.io/MachineAPIMigration.yaml
@@ -0,0 +1,415 @@
+apiVersion: apiextensions.k8s.io/v1 # Hack because controller-gen complains if we don't have this
+name: "Machine"
+crdName: machines.machine.openshift.io
+featureGate: MachineAPIMigration
+tests:
+  onCreate:
+  - name: Should accept MachineAPI as a valid spec authoritative API
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+  - name: Should accept ClusterAPI as a valid spec authoritative API
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+  - name: Should reject Migrating as a valid spec authoritative API
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: Migrating
+    expectedError: "spec.authoritativeAPI: Unsupported value: \"Migrating\": supported values: \"MachineAPI\", \"ClusterAPI\""
+  onUpdate:
+  - name: Should allow updating the spec authoritative API to ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+  - name: Should allow updating the spec authoritative API to MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+  - name: Should allow updating the status authoritative API to Migrating from MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+  - name: Should allow updating the status authoritative API to Migrating from ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+  - name: Should allow updating the status authoritative API to MachineAPI from Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+  - name: Should allow updating the status authoritative API to ClusterAPI from Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+  - name: Should not allow updating the status authoritative API to ClusterAPI from MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    expectedStatusError: "status.authoritativeAPI: Invalid value: \"string\": The authoritativeAPI field must not transition directly from MachineAPI to ClusterAPI or vice versa. It must transition through Migrating."
+  - name: Should not allow updating the status authoritative API to MachineAPI from ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+    expectedStatusError: "status.authoritativeAPI: Invalid value: \"string\": The authoritativeAPI field must not transition directly from MachineAPI to ClusterAPI or vice versa. It must transition through Migrating."
+  - name: Should allow adding the synchronizedGeneration field to an existing status
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+  - name: Should allow adding the authoritativeAPI field to an existing status
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        synchronizedGeneration: 0
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+  - name: Should increasing the synchronizedGeneration while the Authoritative API is MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 2
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 2
+  - name: Should increasing the synchronizedGeneration while the Authoritative API is Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 2
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 2
+  - name: Should increasing the synchronizedGeneration while the Authoritative API is ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 2
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 2
+  - name: Should not allow decreasing the synchronizedGeneration while the Authoritative API is MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 2
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 1
+    expectedStatusError: "status: Invalid value: \"object\": syncronizedGeneration must not decrease unless authoritativeAPI is transitioning from Migrating to another value"
+  - name: Should not allow decreasing the synchronizedGeneration while the Authoritative API is Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 2
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    expectedStatusError: "status: Invalid value: \"object\": syncronizedGeneration must not decrease unless authoritativeAPI is transitioning from Migrating to another value"
+  - name: Should not allow decreasing the synchronizedGeneration while the Authoritative API is ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 2
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 1
+    expectedStatusError: "status: Invalid value: \"object\": syncronizedGeneration must not decrease unless authoritativeAPI is transitioning from Migrating to another value"
+  - name: Should allow decreasing the synchronizedGeneration while the Authoritative API is moved from Migrating to MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+  - name: Should allow decreasing the synchronizedGeneration while the Authoritative API is moved from Migrating to ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: Machine
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 0
diff --git a/machine/v1beta1/tests/machinesets.machine.openshift.io/MachineAPIMigration.yaml b/machine/v1beta1/tests/machinesets.machine.openshift.io/MachineAPIMigration.yaml
new file mode 100644
index 00000000000..448145a2074
--- /dev/null
+++ b/machine/v1beta1/tests/machinesets.machine.openshift.io/MachineAPIMigration.yaml
@@ -0,0 +1,430 @@
+apiVersion: apiextensions.k8s.io/v1 # Hack because controller-gen complains if we don't have this
+name: "MachineSet"
+crdName: machinesets.machine.openshift.io
+featureGate: MachineAPIMigration
+tests:
+  onCreate:
+  - name: Should accept MachineAPI as a valid spec authoritative API
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+  - name: Should accept ClusterAPI as a valid spec authoritative API
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+        replicas: 1
+  - name: Should reject Migrating as a valid spec authoritative API
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: Migrating
+    expectedError: "spec.authoritativeAPI: Unsupported value: \"Migrating\": supported values: \"MachineAPI\", \"ClusterAPI\""
+  onUpdate:
+  - name: Should allow updating the spec authoritative API to ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+        replicas: 1
+  - name: Should allow updating the spec authoritative API to MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+  - name: Should allow updating the status authoritative API to Migrating from MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+        replicas: 1
+      status:
+        authoritativeAPI: Migrating
+  - name: Should allow updating the status authoritative API to Migrating from ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: Migrating
+  - name: Should allow updating the status authoritative API to MachineAPI from Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: MachineAPI
+  - name: Should allow updating the status authoritative API to ClusterAPI from Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+        replicas: 1
+      status:
+        authoritativeAPI: ClusterAPI
+  - name: Should not allow updating the status authoritative API to ClusterAPI from MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    expectedStatusError: "status.authoritativeAPI: Invalid value: \"string\": The authoritativeAPI field must not transition directly from MachineAPI to ClusterAPI or vice versa. It must transition through Migrating."
+  - name: Should not allow updating the status authoritative API to MachineAPI from ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: ClusterAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+    expectedStatusError: "status.authoritativeAPI: Invalid value: \"string\": The authoritativeAPI field must not transition directly from MachineAPI to ClusterAPI or vice versa. It must transition through Migrating."
+  - name: Should allow adding the synchronizedGeneration field to an existing status
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+  - name: Should allow adding the authoritativeAPI field to an existing status
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        synchronizedGeneration: 0
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+  - name: Should increasing the synchronizedGeneration while the Authoritative API is MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 2
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 2
+  - name: Should increasing the synchronizedGeneration while the Authoritative API is Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 2
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 2
+  - name: Should increasing the synchronizedGeneration while the Authoritative API is ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 2
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+        replicas: 1
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 2
+  - name: Should not allow decreasing the synchronizedGeneration while the Authoritative API is MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 2
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 1
+    expectedStatusError: "status: Invalid value: \"object\": syncronizedGeneration must not decrease unless authoritativeAPI is transitioning from Migrating to another value"
+  - name: Should not allow decreasing the synchronizedGeneration while the Authoritative API is Migrating
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 2
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    expectedStatusError: "status: Invalid value: \"object\": syncronizedGeneration must not decrease unless authoritativeAPI is transitioning from Migrating to another value"
+  - name: Should not allow decreasing the synchronizedGeneration while the Authoritative API is ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 2
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 1
+    expectedStatusError: "status: Invalid value: \"object\": syncronizedGeneration must not decrease unless authoritativeAPI is transitioning from Migrating to another value"
+  - name: Should allow decreasing the synchronizedGeneration while the Authoritative API is moved from Migrating to MachineAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: MachineAPI
+        replicas: 1
+      status:
+        authoritativeAPI: MachineAPI
+        synchronizedGeneration: 0
+  - name: Should allow decreasing the synchronizedGeneration while the Authoritative API is moved from Migrating to ClusterAPI
+    initial: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: Migrating
+        synchronizedGeneration: 1
+    updated: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 0
+    expected: |
+      apiVersion: machine.openshift.io/v1beta1
+      kind: MachineSet
+      spec:
+        authoritativeAPI: ClusterAPI
+        replicas: 1
+      status:
+        authoritativeAPI: ClusterAPI
+        synchronizedGeneration: 0