diff --git a/tests/cts/net/Android.bp b/tests/cts/net/Android.bp
index 1ba581a..ce94f87 100644
--- a/tests/cts/net/Android.bp
+++ b/tests/cts/net/Android.bp
@@ -24,6 +24,9 @@
         "framework-connectivity-test-defaults",
     ],
 
+    // TODO(b/391766151): remove when NetworkAgentTest passes with Kotlin 2.
+    kotlin_lang_version: "1.9",
+
     // Include both the 32 and 64 bit versions
     compile_multilib: "both",