diff --git a/google/internal/oauth/stsExchange.go b/google/internal/oauth/stsExchange.go
index 24684e0..6255dc9 100644
--- a/google/internal/oauth/stsExchange.go
+++ b/google/internal/oauth/stsExchange.go
@@ -22,20 +22,6 @@ func ExchangeToken(endpoint string, request *STSTokenExchangeRequest, authentica
 	data.Set("subject_token", request.SubjectToken)
 	data.Set("scope", strings.Join(request.Scope, " "))
 
-	//req, err := http.NewRequest("POST", endpoint, strings.NewReader(data.Encode()))
-	//if err != nil {
-	//	fmt.Errorf("oauth2/google: failed to properly build http request")
-	//}
-	//for key, _ := range headers {
-	//	for _, val := range headers.Values(key) {
-	//		req.Header.Add(key, val)
-	//	}
-	//}
-	//if authentication.ClientID != "" && authentication.ClientSecret != "" {
-	//	plainHeader := authentication.ClientID + ":" + authentication.ClientSecret
-	//	req.Header.Add("Authorization", "Basic "+base64.StdEncoding.EncodeToString([]byte(plainHeader)))
-	//}
-	//req.Header.Add("Content-Length", strconv.Itoa(len(data.Encode())))
 	authentication.InjectAuthentication(&data, &headers)
 	req, err := http.NewRequest("POST", endpoint, strings.NewReader(data.Encode()))
 	if err != nil {
diff --git a/google/internal/oauth/stsExchange_test.go b/google/internal/oauth/stsExchange_test.go
index 31b1b3f..99f8959 100644
--- a/google/internal/oauth/stsExchange_test.go
+++ b/google/internal/oauth/stsExchange_test.go
@@ -1,15 +1,5 @@
 package externalaccount
 
-import (
-	"net/http"
-	"net/http/httptest"
-	"testing"
-)
-
-stsExchange_test.go
-
-package externalaccount
-
 import (
 "github.com/google/go-cmp/cmp"
 "golang.org/x/oauth2"
@@ -97,6 +87,7 @@ func TestExchangeToken(t *testing.T) {
 		if diff := cmp.Diff(*r, serverReq); diff != "" {
 			t.Errorf("mismatched messages received by mock server (-want +got): \n%s", diff)
 		}
+		if r.URL.String() !=
 
 		return
 	}))