diff --git a/java/app.go b/java/app.go
index 48ef90b16..43bdc91de 100755
--- a/java/app.go
+++ b/java/app.go
@@ -1398,6 +1398,8 @@ func AndroidTestImportFactory() android.Module {
 		module.processVariants(ctx)
 	})
 
+	module.dexpreopter.isTest = true
+
 	android.InitApexModule(module)
 	android.InitAndroidMultiTargetsArchModule(module, android.DeviceSupported, android.MultilibCommon)
 	android.InitDefaultableModule(module)