diff --git a/api/transport/BUILD.gn b/api/transport/BUILD.gn
index 08f3d6d1d0..12a1f57066 100644
--- a/api/transport/BUILD.gn
+++ b/api/transport/BUILD.gn
@@ -155,6 +155,7 @@ if (rtc_include_tests) {
 
 if (rtc_include_tests) {
   rtc_source_set("mock_network_control") {
+    visibility = [ "*" ]
     testonly = true
     sources = [ "test/mock_network_control.h" ]
     deps = [