diff --git a/sdk/testing.go b/sdk/testing.go
index 4361754..40abdcd 100644
--- a/sdk/testing.go
+++ b/sdk/testing.go
@@ -84,6 +84,7 @@
 	android.RegisterPackageBuildComponents(ctx)
 	ctx.PreArchMutators(android.RegisterVisibilityRuleChecker)
 	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
+	ctx.PreArchMutators(android.RegisterComponentsMutator)
 	ctx.PreArchMutators(android.RegisterVisibilityRuleGatherer)
 	ctx.PostDepsMutators(android.RegisterVisibilityRuleEnforcer)