diff --git a/rust/testing.go b/rust/testing.go
index 24defa6..fbded73 100644
--- a/rust/testing.go
+++ b/rust/testing.go
@@ -164,25 +164,25 @@
 
 func CreateTestContext(bp string) *android.TestContext {
 	ctx := android.NewTestArchContext()
-	ctx.RegisterModuleType("cc_library", android.ModuleFactoryAdaptor(cc.LibraryFactory))
-	ctx.RegisterModuleType("cc_object", android.ModuleFactoryAdaptor(cc.ObjectFactory))
-	ctx.RegisterModuleType("rust_binary", android.ModuleFactoryAdaptor(RustBinaryFactory))
-	ctx.RegisterModuleType("rust_binary_host", android.ModuleFactoryAdaptor(RustBinaryHostFactory))
-	ctx.RegisterModuleType("rust_test", android.ModuleFactoryAdaptor(RustTestFactory))
-	ctx.RegisterModuleType("rust_test_host", android.ModuleFactoryAdaptor(RustTestHostFactory))
-	ctx.RegisterModuleType("rust_library", android.ModuleFactoryAdaptor(RustLibraryFactory))
-	ctx.RegisterModuleType("rust_library_host", android.ModuleFactoryAdaptor(RustLibraryHostFactory))
-	ctx.RegisterModuleType("rust_library_host_rlib", android.ModuleFactoryAdaptor(RustLibraryRlibHostFactory))
-	ctx.RegisterModuleType("rust_library_host_dylib", android.ModuleFactoryAdaptor(RustLibraryDylibHostFactory))
-	ctx.RegisterModuleType("rust_library_rlib", android.ModuleFactoryAdaptor(RustLibraryRlibFactory))
-	ctx.RegisterModuleType("rust_library_dylib", android.ModuleFactoryAdaptor(RustLibraryDylibFactory))
-	ctx.RegisterModuleType("rust_library_shared", android.ModuleFactoryAdaptor(RustLibrarySharedFactory))
-	ctx.RegisterModuleType("rust_library_static", android.ModuleFactoryAdaptor(RustLibraryStaticFactory))
-	ctx.RegisterModuleType("rust_library_host_shared", android.ModuleFactoryAdaptor(RustLibrarySharedHostFactory))
-	ctx.RegisterModuleType("rust_library_host_static", android.ModuleFactoryAdaptor(RustLibraryStaticHostFactory))
-	ctx.RegisterModuleType("rust_proc_macro", android.ModuleFactoryAdaptor(ProcMacroFactory))
-	ctx.RegisterModuleType("rust_prebuilt_dylib", android.ModuleFactoryAdaptor(PrebuiltDylibFactory))
-	ctx.RegisterModuleType("toolchain_library", android.ModuleFactoryAdaptor(cc.ToolchainLibraryFactory))
+	ctx.RegisterModuleType("cc_library", cc.LibraryFactory)
+	ctx.RegisterModuleType("cc_object", cc.ObjectFactory)
+	ctx.RegisterModuleType("rust_binary", RustBinaryFactory)
+	ctx.RegisterModuleType("rust_binary_host", RustBinaryHostFactory)
+	ctx.RegisterModuleType("rust_test", RustTestFactory)
+	ctx.RegisterModuleType("rust_test_host", RustTestHostFactory)
+	ctx.RegisterModuleType("rust_library", RustLibraryFactory)
+	ctx.RegisterModuleType("rust_library_host", RustLibraryHostFactory)
+	ctx.RegisterModuleType("rust_library_host_rlib", RustLibraryRlibHostFactory)
+	ctx.RegisterModuleType("rust_library_host_dylib", RustLibraryDylibHostFactory)
+	ctx.RegisterModuleType("rust_library_rlib", RustLibraryRlibFactory)
+	ctx.RegisterModuleType("rust_library_dylib", RustLibraryDylibFactory)
+	ctx.RegisterModuleType("rust_library_shared", RustLibrarySharedFactory)
+	ctx.RegisterModuleType("rust_library_static", RustLibraryStaticFactory)
+	ctx.RegisterModuleType("rust_library_host_shared", RustLibrarySharedHostFactory)
+	ctx.RegisterModuleType("rust_library_host_static", RustLibraryStaticHostFactory)
+	ctx.RegisterModuleType("rust_proc_macro", ProcMacroFactory)
+	ctx.RegisterModuleType("rust_prebuilt_dylib", PrebuiltDylibFactory)
+	ctx.RegisterModuleType("toolchain_library", cc.ToolchainLibraryFactory)
 	ctx.PreDepsMutators(func(ctx android.RegisterMutatorsContext) {
 		// cc mutators
 		ctx.BottomUp("image", cc.ImageMutator).Parallel()