diff --git a/src/test/resources/projects/forge/simpleMixinAp/build.gradle b/src/test/resources/projects/forge/simpleMixinAp/build.gradle
index a8f55014..ff086c79 100644
--- a/src/test/resources/projects/forge/simpleMixinAp/build.gradle
+++ b/src/test/resources/projects/forge/simpleMixinAp/build.gradle
@@ -22,6 +22,10 @@ loom {
 	forge {
 		mixinConfigs 'my_mixins.json'
 	}
+
+	mixin {
+		useLegacyMixinAp = true
+	}
 }
 
 repositories {