diff --git a/.github/workflows/test-main-lib.yml b/.github/workflows/test-main-lib.yml
index 7011e9b..76aae44 100644
--- a/.github/workflows/test-main-lib.yml
+++ b/.github/workflows/test-main-lib.yml
@@ -37,4 +37,4 @@ jobs:
         uses: actions-rust-lang/setup-rust-toolchain@v1
 
       - name: Test
-        run: cargo test
+        run: RUSTFLAGS="-A unreachable_code" cargo test