diff --git a/internal/bminventory/inventory_test.go b/internal/bminventory/inventory_test.go
index acfd6a40197..983a8ea4cc7 100644
--- a/internal/bminventory/inventory_test.go
+++ b/internal/bminventory/inventory_test.go
@@ -4829,9 +4829,9 @@ var _ = Describe("cluster", func() {
 
 			Context("Networks", func() {
 				var (
-					clusterNetworks = common.TestIPv4Networking.ClusterNetworks
-					serviceNetworks = common.TestIPv4Networking.ServiceNetworks
-					machineNetworks = common.TestIPv4Networking.MachineNetworks
+					clusterNetworks = []*models.ClusterNetwork{{Cidr: "1.1.0.0/24", HostPrefix: 24}, {Cidr: "2.2.0.0/24", HostPrefix: 24}}
+					serviceNetworks = []*models.ServiceNetwork{{Cidr: "3.3.0.0/24"}, {Cidr: "4.4.0.0/24"}}
+					machineNetworks = []*models.MachineNetwork{{Cidr: "5.5.0.0/24"}, {Cidr: "6.6.0.0/24"}}
 				)
 
 				setNetworksClusterID := func(clusterID strfmt.UUID,
@@ -5020,22 +5020,16 @@ var _ = Describe("cluster", func() {
 					verifyApiErrorString(reply, http.StatusBadRequest, "Machine network CIDR '': Failed to parse CIDR '': invalid CIDR address: ")
 				})
 
-				It("Multiple machine networks illegal for single-stack", func() {
-					reply := bm.V2UpdateCluster(ctx, installer.V2UpdateClusterParams{
-						ClusterID: clusterID,
-						ClusterUpdateParams: &models.V2ClusterUpdateParams{
-							MachineNetworks: []*models.MachineNetwork{{Cidr: "15.15.0.0/21"}, {Cidr: "16.16.0.0/21"}},
-						},
-					})
-					verifyApiErrorString(reply, http.StatusBadRequest, "Single-stack cluster cannot contain multiple Machine Networks")
-				})
+				It("Override networks - additional subnet", func() {
+					clusterNetworks = []*models.ClusterNetwork{{Cidr: "11.11.0.0/21", HostPrefix: 24}, {Cidr: "12.12.0.0/21", HostPrefix: 24}}
+					serviceNetworks = []*models.ServiceNetwork{{Cidr: "13.13.0.0/21"}, {Cidr: "14.14.0.0/21"}}
+					machineNetworks = []*models.MachineNetwork{{Cidr: "15.15.0.0/21"}, {Cidr: "16.16.0.0/21"}}
 
-				It("Override networks - additional cluster subnet", func() {
 					mockSuccess(1)
 					reply := bm.V2UpdateCluster(ctx, installer.V2UpdateClusterParams{
 						ClusterID: clusterID,
 						ClusterUpdateParams: &models.V2ClusterUpdateParams{
-							ClusterNetworks:   []*models.ClusterNetwork{{Cidr: "11.11.0.0/21", HostPrefix: 24}, {Cidr: "12.12.0.0/21", HostPrefix: 24}},
+							ClusterNetworks:   clusterNetworks,
 							ServiceNetworks:   serviceNetworks,
 							MachineNetworks:   machineNetworks,
 							VipDhcpAllocation: swag.Bool(true),
@@ -5044,19 +5038,20 @@ var _ = Describe("cluster", func() {
 					Expect(reply).To(BeAssignableToTypeOf(installer.NewV2UpdateClusterCreated()))
 					actual := reply.(*installer.V2UpdateClusterCreated)
 
-					validateNetworkConfiguration(actual.Payload,
-						&[]*models.ClusterNetwork{{Cidr: "11.11.0.0/21", HostPrefix: 24}, {Cidr: "12.12.0.0/21", HostPrefix: 24}},
-						&serviceNetworks,
-						&machineNetworks)
+					validateNetworkConfiguration(actual.Payload, &clusterNetworks, &serviceNetworks, &machineNetworks)
 					validateHostsRequestedHostname(actual.Payload)
 				})
 
-				It("Override networks - 2 additional cluster subnets", func() {
+				It("Override networks - 2 additional subnets", func() {
+					clusterNetworks = []*models.ClusterNetwork{{Cidr: "10.10.0.0/21", HostPrefix: 24}, {Cidr: "11.11.0.0/21", HostPrefix: 24}, {Cidr: "12.12.0.0/21", HostPrefix: 24}}
+					serviceNetworks = []*models.ServiceNetwork{{Cidr: "13.13.0.0/21"}, {Cidr: "14.14.0.0/21"}}
+					machineNetworks = []*models.MachineNetwork{{Cidr: "15.15.0.0/21"}, {Cidr: "16.16.0.0/21"}}
+
 					mockSuccess(1)
 					reply := bm.V2UpdateCluster(ctx, installer.V2UpdateClusterParams{
 						ClusterID: clusterID,
 						ClusterUpdateParams: &models.V2ClusterUpdateParams{
-							ClusterNetworks:   []*models.ClusterNetwork{{Cidr: "10.10.0.0/21", HostPrefix: 24}, {Cidr: "11.11.0.0/21", HostPrefix: 24}, {Cidr: "12.12.0.0/21", HostPrefix: 24}},
+							ClusterNetworks:   clusterNetworks,
 							ServiceNetworks:   serviceNetworks,
 							MachineNetworks:   machineNetworks,
 							VipDhcpAllocation: swag.Bool(true),
@@ -5065,10 +5060,7 @@ var _ = Describe("cluster", func() {
 					Expect(reply).To(BeAssignableToTypeOf(installer.NewV2UpdateClusterCreated()))
 					actual := reply.(*installer.V2UpdateClusterCreated)
 
-					validateNetworkConfiguration(actual.Payload,
-						&[]*models.ClusterNetwork{{Cidr: "10.10.0.0/21", HostPrefix: 24}, {Cidr: "11.11.0.0/21", HostPrefix: 24}, {Cidr: "12.12.0.0/21", HostPrefix: 24}},
-						&serviceNetworks,
-						&machineNetworks)
+					validateNetworkConfiguration(actual.Payload, &clusterNetworks, &serviceNetworks, &machineNetworks)
 					validateHostsRequestedHostname(actual.Payload)
 				})
 
@@ -15216,9 +15208,9 @@ var _ = Describe("RegisterCluster", func() {
 
 	Context("Networking", func() {
 		var (
-			clusterNetworks = common.TestIPv4Networking.ClusterNetworks
-			serviceNetworks = common.TestIPv4Networking.ServiceNetworks
-			machineNetworks = common.TestIPv4Networking.MachineNetworks
+			clusterNetworks = []*models.ClusterNetwork{{Cidr: "1.1.1.0/24", HostPrefix: 24}, {Cidr: "2.2.2.0/24", HostPrefix: 24}}
+			serviceNetworks = []*models.ServiceNetwork{{Cidr: "3.3.3.0/24"}, {Cidr: "4.4.4.0/24"}}
+			machineNetworks = []*models.MachineNetwork{{Cidr: "5.5.5.0/24"}, {Cidr: "6.6.6.0/24"}, {Cidr: "7.7.7.0/24"}}
 		)
 
 		registerCluster := func() *models.Cluster {
diff --git a/internal/cluster/validations/validations.go b/internal/cluster/validations/validations.go
index f3bfb6f97ae..b0f53222f14 100644
--- a/internal/cluster/validations/validations.go
+++ b/internal/cluster/validations/validations.go
@@ -605,11 +605,6 @@ func ValidateDualStackNetworks(clusterParams interface{}, alreadyDualStack bool)
 				return err
 			}
 		}
-	} else {
-		if len(machineNetworks) > 1 {
-			err := errors.Errorf("Single-stack cluster cannot contain multiple Machine Networks")
-			return err
-		}
 	}
 	return nil
 }