diff --git a/ci/run.sh b/ci/run.sh
index d28811300..42c241645 100755
--- a/ci/run.sh
+++ b/ci/run.sh
@@ -6,7 +6,6 @@ TARGET=$1
 cargo test --target $TARGET
 cargo test --target $TARGET --release
 
-# FIXME(#4) overflow checks in non-release currently cause issues
-#cargo test --features 'checked musl-reference-tests' --target $TARGET
+cargo test --features 'checked musl-reference-tests' --target $TARGET
 
 cargo test --features 'checked musl-reference-tests' --target $TARGET --release