diff --git a/cluster-autoscaler/expander/grpcplugin/grpc_client.go b/cluster-autoscaler/expander/grpcplugin/grpc_client.go
index 679dce80e288..bccce82c844b 100644
--- a/cluster-autoscaler/expander/grpcplugin/grpc_client.go
+++ b/cluster-autoscaler/expander/grpcplugin/grpc_client.go
@@ -119,11 +119,11 @@ func populateOptionsForGRPC(expansionOptions []expander.Option) ([]*protos.Optio
 }
 
 func getSimilarNodeGroupIds(option expander.Option) []string {
-	var similarNodegroupIds []string
+	var similarNodeGroupIds []string
 	for _, sng := range option.SimilarNodeGroups {
-		similarNodegroupIds = append(similarNodegroupIds, sng.Id())
+		similarNodeGroupIds = append(similarNodeGroupIds, sng.Id())
 	}
-	return similarNodegroupIds
+	return similarNodeGroupIds
 }
 
 // populateNodeInfoForGRPC looks at the corresponding v1.Node object per NodeInfo object, and populates the grpcNodeInfoMap with these to pass over grpc
@@ -160,7 +160,7 @@ func getRetainedSimilarNodegroups(grpcOption *protos.Option, expanderOption expa
 	var retainedSimilarNodeGroups []cloudprovider.NodeGroup
 	for _, sng := range expanderOption.SimilarNodeGroups {
 		retained := false
-		for _, id := range grpcOption.SimilarNodegroupIds {
+		for _, id := range grpcOption.SimilarNodeGroupIds {
 			if sng.Id() == id {
 				retained = true
 				continue
@@ -173,6 +173,6 @@ func getRetainedSimilarNodegroups(grpcOption *protos.Option, expanderOption expa
 	return retainedSimilarNodeGroups
 }
 
-func newOptionMessage(nodeGroupId string, nodeCount int32, debug string, pods []*v1.Pod, similarNodegroupIds []string) *protos.Option {
-	return &protos.Option{NodeGroupId: nodeGroupId, NodeCount: nodeCount, Debug: debug, Pod: pods, SimilarNodegroupIds: similarNodegroupIds}
+func newOptionMessage(nodeGroupId string, nodeCount int32, debug string, pods []*v1.Pod, similarNodeGroupIds []string) *protos.Option {
+	return &protos.Option{NodeGroupId: nodeGroupId, NodeCount: nodeCount, Debug: debug, Pod: pods, SimilarNodeGroupIds: similarNodeGroupIds}
 }
diff --git a/cluster-autoscaler/expander/grpcplugin/grpc_client_test.go b/cluster-autoscaler/expander/grpcplugin/grpc_client_test.go
index 113e1c8e2469..c97dced54e01 100644
--- a/cluster-autoscaler/expander/grpcplugin/grpc_client_test.go
+++ b/cluster-autoscaler/expander/grpcplugin/grpc_client_test.go
@@ -95,14 +95,14 @@ var (
 		NodeCount:           int32(eoT2Micro.NodeCount),
 		Debug:               eoT2Micro.Debug,
 		Pod:                 eoT2Micro.Pods,
-		SimilarNodegroupIds: []string{eoT2MicroWithSimilar.SimilarNodeGroups[0].Id()},
+		SimilarNodeGroupIds: []string{eoT2MicroWithSimilar.SimilarNodeGroups[0].Id()},
 	}
 	grpcEoT2MicroWithSimilarWithExtraOptions = protos.Option{
 		NodeGroupId:         eoT2Micro.NodeGroup.Id(),
 		NodeCount:           int32(eoT2Micro.NodeCount),
 		Debug:               eoT2Micro.Debug,
 		Pod:                 eoT2Micro.Pods,
-		SimilarNodegroupIds: []string{eoT2MicroWithSimilar.SimilarNodeGroups[0].Id(), "extra-ng-id"},
+		SimilarNodeGroupIds: []string{eoT2MicroWithSimilar.SimilarNodeGroups[0].Id(), "extra-ng-id"},
 	}
 )
 
@@ -228,7 +228,7 @@ func TestBestOptionsValid(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 	mockClient := mocks.NewMockExpanderClient(ctrl)
-	g := &grpcclientstrategy{grpcClient: mockClient}
+	g := &grpcclientstrategy{mockClient}
 
 	nodeInfos := makeFakeNodeInfos()
 	grpcNodeInfoMap := make(map[string]*v1.Node)
@@ -254,7 +254,7 @@ func TestBestOptionsErrors(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 	mockClient := mocks.NewMockExpanderClient(ctrl)
-	g := grpcclientstrategy{grpcClient: mockClient}
+	g := grpcclientstrategy{mockClient}
 
 	badProtosOption := protos.Option{
 		NodeGroupId: "badID",
@@ -272,7 +272,7 @@ func TestBestOptionsErrors(t *testing.T) {
 	}{
 		{
 			desc:         "Bad gRPC client config",
-			client:       grpcclientstrategy{grpcClient: nil},
+			client:       grpcclientstrategy{nil},
 			nodeInfo:     makeFakeNodeInfos(),
 			mockResponse: protos.BestOptionsResponse{},
 			errResponse:  nil,
diff --git a/cluster-autoscaler/expander/grpcplugin/protos/expander.pb.go b/cluster-autoscaler/expander/grpcplugin/protos/expander.pb.go
index c194c16a3f47..6c6a022acc75 100644
--- a/cluster-autoscaler/expander/grpcplugin/protos/expander.pb.go
+++ b/cluster-autoscaler/expander/grpcplugin/protos/expander.pb.go
@@ -145,7 +145,7 @@ type Option struct {
 	NodeCount           int32     `protobuf:"varint,2,opt,name=nodeCount,proto3" json:"nodeCount,omitempty"`
 	Debug               string    `protobuf:"bytes,3,opt,name=debug,proto3" json:"debug,omitempty"`
 	Pod                 []*v1.Pod `protobuf:"bytes,4,rep,name=pod,proto3" json:"pod,omitempty"`
-	SimilarNodegroupIds []string  `protobuf:"bytes,5,rep,name=similarNodegroupIds,proto3" json:"similarNodegroupIds,omitempty"`
+	SimilarNodeGroupIds []string  `protobuf:"bytes,5,rep,name=similarNodeGroupIds,proto3" json:"similarNodeGroupIds,omitempty"`
 }
 
 func (x *Option) Reset() {
@@ -208,9 +208,9 @@ func (x *Option) GetPod() []*v1.Pod {
 	return nil
 }
 
-func (x *Option) GetSimilarNodegroupIds() []string {
+func (x *Option) GetSimilarNodeGroupIds() []string {
 	if x != nil {
-		return x.SimilarNodegroupIds
+		return x.SimilarNodeGroupIds
 	}
 	return nil
 }
@@ -250,8 +250,8 @@ var file_expander_proto_rawDesc = []byte{
 	0x04, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x17, 0x2e, 0x6b, 0x38, 0x73, 0x2e, 0x69, 0x6f, 0x2e, 0x61,
 	0x70, 0x69, 0x2e, 0x63, 0x6f, 0x72, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x50, 0x6f, 0x64, 0x52, 0x03,
 	0x70, 0x6f, 0x64, 0x12, 0x30, 0x0a, 0x13, 0x73, 0x69, 0x6d, 0x69, 0x6c, 0x61, 0x72, 0x4e, 0x6f,
-	0x64, 0x65, 0x67, 0x72, 0x6f, 0x75, 0x70, 0x49, 0x64, 0x73, 0x18, 0x05, 0x20, 0x03, 0x28, 0x09,
-	0x52, 0x13, 0x73, 0x69, 0x6d, 0x69, 0x6c, 0x61, 0x72, 0x4e, 0x6f, 0x64, 0x65, 0x67, 0x72, 0x6f,
+	0x64, 0x65, 0x47, 0x72, 0x6f, 0x75, 0x70, 0x49, 0x64, 0x73, 0x18, 0x05, 0x20, 0x03, 0x28, 0x09,
+	0x52, 0x13, 0x73, 0x69, 0x6d, 0x69, 0x6c, 0x61, 0x72, 0x4e, 0x6f, 0x64, 0x65, 0x47, 0x72, 0x6f,
 	0x75, 0x70, 0x49, 0x64, 0x73, 0x32, 0x5c, 0x0a, 0x08, 0x45, 0x78, 0x70, 0x61, 0x6e, 0x64, 0x65,
 	0x72, 0x12, 0x50, 0x0a, 0x0b, 0x42, 0x65, 0x73, 0x74, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73,
 	0x12, 0x1e, 0x2e, 0x67, 0x72, 0x70, 0x63, 0x70, 0x6c, 0x75, 0x67, 0x69, 0x6e, 0x2e, 0x42, 0x65,
diff --git a/cluster-autoscaler/expander/grpcplugin/protos/expander.proto b/cluster-autoscaler/expander/grpcplugin/protos/expander.proto
index ef696516f986..8300ed49695e 100644
--- a/cluster-autoscaler/expander/grpcplugin/protos/expander.proto
+++ b/cluster-autoscaler/expander/grpcplugin/protos/expander.proto
@@ -27,5 +27,5 @@ message Option {
   int32 nodeCount = 2;
   string debug = 3;
   repeated k8s.io.api.core.v1.Pod pod = 4;
-  repeated string similarNodegroupIds = 5;
+  repeated string similarNodeGroupIds = 5;
 }