diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 0539d30e10..69914342a3 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -78,11 +78,11 @@ jobs:
         run: rustup component add rust-src --toolchain nightly-x86_64-unknown-linux-gnu
       - name: Build Tests
         env:
-          RUSTFLAGS: "--cfg debug_assertions -Zsanitizer=address"
+          RUSTFLAGS: "-C debug-assertions -Zsanitizer=address"
         run: cargo build --tests --workspace --locked -Zbuild-std --target x86_64-unknown-linux-gnu --verbose
       - name: Test
         env:
-          RUSTFLAGS: "--cfg debug_assertions -Zsanitizer=address"
+          RUSTFLAGS: "-C debug-assertions -Zsanitizer=address"
         run: cargo test --workspace --locked --tests -Zbuild-std --target x86_64-unknown-linux-gnu
 
   test: