diff --git a/services/serviceenablement/api_default_test.go b/services/serviceenablement/api_default_test.go
index 9a148d337..a17486cf0 100644
--- a/services/serviceenablement/api_default_test.go
+++ b/services/serviceenablement/api_default_test.go
@@ -25,11 +25,11 @@ func Test_serviceenablement_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService DisableServiceRegional", func(t *testing.T) {
 		_apiUrlPath := "/v2/projects/{projectId}/regions/{region}/services/{serviceId}"
-		regionValue := "region"
+		regionValue := "region-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		serviceIdValue := "serviceId"
+		serviceIdValue := "serviceId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"serviceId"+"}", url.PathEscape(ParameterValueToString(serviceIdValue, "serviceId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -77,11 +77,11 @@ func Test_serviceenablement_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService EnableServiceRegional", func(t *testing.T) {
 		_apiUrlPath := "/v2/projects/{projectId}/regions/{region}/services/{serviceId}"
-		regionValue := "region"
+		regionValue := "region-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		serviceIdValue := "serviceId"
+		serviceIdValue := "serviceId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"serviceId"+"}", url.PathEscape(ParameterValueToString(serviceIdValue, "serviceId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -129,11 +129,11 @@ func Test_serviceenablement_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService GetServiceStatusRegional", func(t *testing.T) {
 		_apiUrlPath := "/v2/projects/{projectId}/regions/{region}/services/{serviceId}"
-		regionValue := "region"
+		regionValue := "region-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
-		serviceIdValue := "serviceId"
+		serviceIdValue := "serviceId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"serviceId"+"}", url.PathEscape(ParameterValueToString(serviceIdValue, "serviceId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
@@ -187,9 +187,9 @@ func Test_serviceenablement_DefaultApiService(t *testing.T) {
 
 	t.Run("Test DefaultApiService ListServiceStatusRegional", func(t *testing.T) {
 		_apiUrlPath := "/v2/projects/{projectId}/regions/{region}/services"
-		regionValue := "region"
+		regionValue := "region-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"region"+"}", url.PathEscape(ParameterValueToString(regionValue, "region")), -1)
-		projectIdValue := "projectId"
+		projectIdValue := "projectId-value"
 		_apiUrlPath = strings.Replace(_apiUrlPath, "{"+"projectId"+"}", url.PathEscape(ParameterValueToString(projectIdValue, "projectId")), -1)
 
 		testDefaultApiServeMux := http.NewServeMux()
diff --git a/services/serviceenablement/client.go b/services/serviceenablement/client.go
index f6795f163..70a4693aa 100644
--- a/services/serviceenablement/client.go
+++ b/services/serviceenablement/client.go
@@ -305,7 +305,7 @@ func (c *APIClient) prepareRequest(
 	var body *bytes.Buffer
 
 	// Detect postBody type and post.
-	if postBody != nil {
+	if !IsNil(postBody) {
 		contentType := headerParams["Content-Type"]
 		if contentType == "" {
 			contentType = detectContentType(postBody)