diff --git a/bin/build_tc b/bin/build_tc
index 25c56fe..357c1ac 100755
--- a/bin/build_tc
+++ b/bin/build_tc
@@ -16,6 +16,8 @@ rustup toolchain update ${TC};
 
 cd ${REPO_DIR}/framed;
 
+export RUSTFLAGS="--deny warnings";
+
 # use_std build
 cargo +${TC} test -p framed --verbose --lib;