diff --git a/rust/testing.go b/rust/testing.go
index 001f322..66877a9 100644
--- a/rust/testing.go
+++ b/rust/testing.go
@@ -17,6 +17,7 @@
 import (
 	"android/soong/android"
 	"android/soong/cc"
+	"android/soong/genrule"
 )
 
 func GatherRequiredDepsForTest() string {
@@ -131,6 +132,7 @@
 	android.RegisterPrebuiltMutators(ctx)
 	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
 	cc.RegisterRequiredBuildComponentsForTest(ctx)
+	ctx.RegisterModuleType("genrule", genrule.GenRuleFactory)
 	ctx.RegisterModuleType("rust_binary", RustBinaryFactory)
 	ctx.RegisterModuleType("rust_binary_host", RustBinaryHostFactory)
 	ctx.RegisterModuleType("rust_bindgen", RustBindgenFactory)