diff --git a/bigquery/v2/bigquery-gen.go b/bigquery/v2/bigquery-gen.go
index 258a44bd538..7b1247e21f7 100644
--- a/bigquery/v2/bigquery-gen.go
+++ b/bigquery/v2/bigquery-gen.go
@@ -145,7 +145,6 @@ func NewService(ctx context.Context, opts ...option.ClientOption) (*Service, err
 	opts = append(opts, internaloption.WithDefaultEndpoint(basePath))
 	opts = append(opts, internaloption.WithDefaultEndpointTemplate(basePathTemplate))
 	opts = append(opts, internaloption.WithDefaultMTLSEndpoint(mtlsBasePath))
-	opts = append(opts, internaloption.EnableNewAuthLibrary())
 	client, endpoint, err := htransport.NewClient(ctx, opts...)
 	if err != nil {
 		return nil, err
diff --git a/compute/v0.alpha/compute-gen.go b/compute/v0.alpha/compute-gen.go
index 4aed399d246..3c4ac294300 100644
--- a/compute/v0.alpha/compute-gen.go
+++ b/compute/v0.alpha/compute-gen.go
@@ -137,7 +137,6 @@ func NewService(ctx context.Context, opts ...option.ClientOption) (*Service, err
 	opts = append(opts, internaloption.WithDefaultEndpoint(basePath))
 	opts = append(opts, internaloption.WithDefaultEndpointTemplate(basePathTemplate))
 	opts = append(opts, internaloption.WithDefaultMTLSEndpoint(mtlsBasePath))
-	opts = append(opts, internaloption.EnableNewAuthLibrary())
 	client, endpoint, err := htransport.NewClient(ctx, opts...)
 	if err != nil {
 		return nil, err
diff --git a/compute/v0.beta/compute-gen.go b/compute/v0.beta/compute-gen.go
index 89e91dc78c1..23a0abfaf95 100644
--- a/compute/v0.beta/compute-gen.go
+++ b/compute/v0.beta/compute-gen.go
@@ -137,7 +137,6 @@ func NewService(ctx context.Context, opts ...option.ClientOption) (*Service, err
 	opts = append(opts, internaloption.WithDefaultEndpoint(basePath))
 	opts = append(opts, internaloption.WithDefaultEndpointTemplate(basePathTemplate))
 	opts = append(opts, internaloption.WithDefaultMTLSEndpoint(mtlsBasePath))
-	opts = append(opts, internaloption.EnableNewAuthLibrary())
 	client, endpoint, err := htransport.NewClient(ctx, opts...)
 	if err != nil {
 		return nil, err
diff --git a/compute/v1/compute-gen.go b/compute/v1/compute-gen.go
index e07038fe97f..29abc286d58 100644
--- a/compute/v1/compute-gen.go
+++ b/compute/v1/compute-gen.go
@@ -137,7 +137,6 @@ func NewService(ctx context.Context, opts ...option.ClientOption) (*Service, err
 	opts = append(opts, internaloption.WithDefaultEndpoint(basePath))
 	opts = append(opts, internaloption.WithDefaultEndpointTemplate(basePathTemplate))
 	opts = append(opts, internaloption.WithDefaultMTLSEndpoint(mtlsBasePath))
-	opts = append(opts, internaloption.EnableNewAuthLibrary())
 	client, endpoint, err := htransport.NewClient(ctx, opts...)
 	if err != nil {
 		return nil, err
diff --git a/google-api-go-generator/gen.go b/google-api-go-generator/gen.go
index 7fa66d717f3..06068115d9b 100644
--- a/google-api-go-generator/gen.go
+++ b/google-api-go-generator/gen.go
@@ -81,6 +81,15 @@ var skipAPIGeneration = map[string]bool{
 	"datalineage:v1":       true,
 }
 
+// skipNewAuthLibrary is a set of APIs to not migrate to cloud.google.com/go/auth.
+var skipNewAuthLibrary = map[string]bool{
+	"bigquery:v2":   true,
+	"compute:alpha": true,
+	"compute:beta":  true,
+	"compute:v1":    true,
+	"storage:v1":    true,
+}
+
 var apisToSplit = map[string]bool{
 	"compute": true,
 }
@@ -888,8 +897,9 @@ func (a *API) GenerateCode() ([]byte, error) {
 	if a.mtlsAPIBaseURL() != "" {
 		pn("opts = append(opts, internaloption.WithDefaultMTLSEndpoint(mtlsBasePath))")
 	}
-	pn("opts = append(opts, internaloption.EnableNewAuthLibrary())")
-
+	if !skipNewAuthLibrary[a.ID] {
+		pn("opts = append(opts, internaloption.EnableNewAuthLibrary())")
+	}
 	pn("client, endpoint, err := htransport.NewClient(ctx, opts...)")
 	pn("if err != nil { return nil, err }")
 	pn("s, err := New(client)")
diff --git a/storage/v1/storage-gen.go b/storage/v1/storage-gen.go
index a6af8bd9ed3..07de6ebf63c 100644
--- a/storage/v1/storage-gen.go
+++ b/storage/v1/storage-gen.go
@@ -133,7 +133,6 @@ func NewService(ctx context.Context, opts ...option.ClientOption) (*Service, err
 	opts = append(opts, internaloption.WithDefaultEndpoint(basePath))
 	opts = append(opts, internaloption.WithDefaultEndpointTemplate(basePathTemplate))
 	opts = append(opts, internaloption.WithDefaultMTLSEndpoint(mtlsBasePath))
-	opts = append(opts, internaloption.EnableNewAuthLibrary())
 	client, endpoint, err := htransport.NewClient(ctx, opts...)
 	if err != nil {
 		return nil, err