diff --git a/tests/toolchains/defs.bzl b/tests/toolchains/defs.bzl
index 076e6b42eb..fbb70820c9 100644
--- a/tests/toolchains/defs.bzl
+++ b/tests/toolchains/defs.bzl
@@ -26,6 +26,7 @@ def define_toolchain_tests(name):
     for platform_key, platform_info in PLATFORMS.items():
         native.config_setting(
             name = "_is_{}".format(platform_key),
+            flag_values = platform_info.flag_values,
             constraint_values = platform_info.compatible_with,
         )