diff --git a/crates/roc_std/src/lib.rs b/crates/roc_std/src/lib.rs
index 2e78d67f97..49b07626d2 100644
--- a/crates/roc_std/src/lib.rs
+++ b/crates/roc_std/src/lib.rs
@@ -40,6 +40,7 @@ extern "C" {
 #[cfg(not(feature = "platform"))]
 pub use platform_dummys::*;
 
+#[cfg(any(not(feature = "platform"), test))]
 pub mod platform_dummys {
     use core::ffi::c_void;