diff --git a/justfile b/justfile
index 5948224..041a171 100644
--- a/justfile
+++ b/justfile
@@ -2,5 +2,5 @@ nightly := 'cargo +nightly'
 rustc_nightly_flags := '-Z randomize-layout'
 
 test:
-    RUST_FLAGS='{{rustc_nightly_flags}}' {{nightly}} miri test
+    RUSTFLAGS='{{rustc_nightly_flags}}' {{nightly}} miri test