diff --git a/compiler/test_gen/src/helpers/llvm.rs b/compiler/test_gen/src/helpers/llvm.rs
index 068a38bc3b..46b74a96bf 100644
--- a/compiler/test_gen/src/helpers/llvm.rs
+++ b/compiler/test_gen/src/helpers/llvm.rs
@@ -60,7 +60,7 @@ fn create_llvm_module<'a>(
         Default::default(),
         target_info,
         RenderTarget::ColorTerminal,
-        Threading::AllAvailable,
+        Threading::Single,
     );
 
     let mut loaded = match loaded {