diff --git a/google/google.go b/google/google.go
index 8fb5924..c626475 100644
--- a/google/google.go
+++ b/google/google.go
@@ -123,8 +123,8 @@ func NewComputeEngineConfig(account string) (*ComputeEngineConfig, error) {
 }
 
 // NewTransport creates an authorized transport.
-func (c *ComputeEngineConfig) NewTransport() (oauth2.Transport, error) {
-	return oauth2.NewAuthorizedTransport(c, nil), nil
+func (c *ComputeEngineConfig) NewTransport() oauth2.Transport {
+	return oauth2.NewAuthorizedTransport(c, nil)
 }
 
 // FetchToken retrieves a new access token via metadata server.
diff --git a/jwt.go b/jwt.go
index 6e5f2d0..b5f25e3 100644
--- a/jwt.go
+++ b/jwt.go
@@ -75,14 +75,14 @@ func (c *JWTConfig) Options() *JWTOptions {
 
 // NewTransport creates a transport that is authorize with the
 // parent JWT configuration.
-func (c *JWTConfig) NewTransport() (Transport, error) {
-	return NewAuthorizedTransport(c, &Token{}), nil
+func (c *JWTConfig) NewTransport() Transport {
+	return NewAuthorizedTransport(c, &Token{})
 }
 
 // NewTransportWithUser creates a transport that is authorized by
 // the client and impersonates the specified user.
-func (c *JWTConfig) NewTransportWithUser(user string) (Transport, error) {
-	return NewAuthorizedTransport(c, &Token{Subject: user}), nil
+func (c *JWTConfig) NewTransportWithUser(user string) Transport {
+	return NewAuthorizedTransport(c, &Token{Subject: user})
 }
 
 // fetchToken retrieves a new access token and updates the existing token
diff --git a/oauth2.go b/oauth2.go
index 5b93315..ad18c48 100644
--- a/oauth2.go
+++ b/oauth2.go
@@ -178,8 +178,8 @@ func (c *Config) AuthCodeURL(state string) (authURL string, err error) {
 //     t, _ := c.NewTransport()
 //     t.SetToken(validToken)
 //
-func (c *Config) NewTransport() (Transport, error) {
-	return NewAuthorizedTransport(c, nil), nil
+func (c *Config) NewTransport() Transport {
+	return NewAuthorizedTransport(c, nil)
 }
 
 // NewTransportWithCode exchanges the OAuth 2.0 exchange code with