diff --git a/cc/testing.go b/cc/testing.go
index 44a865d..e42b9fa 100644
--- a/cc/testing.go
+++ b/cc/testing.go
@@ -41,6 +41,7 @@
 	ctx.RegisterModuleType("ndk_prebuilt_static_stl", NdkPrebuiltStaticStlFactory)
 	ctx.RegisterModuleType("ndk_prebuilt_object", NdkPrebuiltObjectFactory)
 	ctx.RegisterModuleType("ndk_library", NdkLibraryFactory)
+	ctx.RegisterModuleType("ndk_headers", ndkHeadersFactory)
 }
 
 func GatherRequiredDepsForTest(oses ...android.OsType) string {