diff --git a/src/cmd/api/goapi_test.go b/src/cmd/api/goapi_test.go
index 1d2cc9ac82..a3fe0efedc 100644
--- a/src/cmd/api/goapi_test.go
+++ b/src/cmd/api/goapi_test.go
@@ -178,7 +178,7 @@ func BenchmarkAll(b *testing.B) {
 		for _, context := range contexts {
 			w := NewWalker(context, filepath.Join(build.Default.GOROOT, "src"))
 			for _, name := range pkgNames {
-				if name != "unsafe" && !strings.HasPrefix(name, "cmd/") {
+				if name != "unsafe" && !strings.HasPrefix(name, "cmd/") && !internalPkg.MatchString(name) {
 					pkg, _ := w.Import(name)
 					w.export(pkg)
 				}