diff --git a/api/BUILD.gn b/api/BUILD.gn
index 833e319154..ac36c44f54 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -862,6 +862,7 @@ if (rtc_include_tests) {
   }
 
   rtc_source_set("mock_peerconnectioninterface") {
+    visibility = [ "*" ]
     testonly = true
     sources = [ "test/mock_peerconnectioninterface.h" ]