diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 9abfd59d8..1323b64ae 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -28,7 +28,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --verbose
+          args: --locked --verbose
 env:
   CARGO_TERM_COLOR: always
   CARGO_INCREMENTAL: 0