diff --git a/changelog.d/11339-typed-array-rmw-test-env-race.md b/changelog.d/11339-typed-array-rmw-test-env-race.md
new file mode 100644
index 0000000000..dfb6f9a782
--- /dev/null
+++ b/changelog.d/11339-typed-array-rmw-test-env-race.md
@@ -0,0 +1 @@
+**test(codegen): fix the `typed_array_rmw_8692` native-reps race.** `compile_artifact()` pointed the process-global `PERRY_NATIVE_REPS_DIR` at a temp dir it deletes on drop while holding `artifact_env_lock()`, and `compile_ir()` took no lock. A parallel compile could then write its native-reps record into a directory being removed, which flakily failed `e2e-scoped` with "failed to write native reps … No such file or directory". `compile_ir()` now takes the same lock.
diff --git a/crates/perry-codegen/tests/typed_array_rmw_8692.rs b/crates/perry-codegen/tests/typed_array_rmw_8692.rs
index 5d60bd9361..96cec89a13 100644
--- a/crates/perry-codegen/tests/typed_array_rmw_8692.rs
+++ b/crates/perry-codegen/tests/typed_array_rmw_8692.rs
@@ -111,6 +111,11 @@ fn rmw_module(name: &str, rhs: Expr) -> Module {
 }
 
 fn compile_ir(module: Module) -> String {
+    // Hold the same lock as `compile_artifact`: that helper points the
+    // process-global PERRY_NATIVE_REPS_DIR at a temp dir it deletes on drop, and
+    // an unlocked compile running meanwhile writes its native-reps record into
+    // that dir and fails with "failed to write native reps ... No such file".
+    let _lock = artifact_env_lock();
     String::from_utf8(
         compile_module(
             &module,