diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 03d049dbc..55baf110d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -56,6 +56,7 @@ jobs:
       - run: cargo check --features raw_value
       - run: cargo check --features unbounded_depth
       - run: cargo check --manifest-path tests/crate/Cargo.toml --no-default-features --features alloc
+      - run: cargo check --manifest-path tests/crate/Cargo.toml --no-default-features --features alloc,arbitrary_precision
       - run: cargo check --manifest-path tests/crate/Cargo.toml --no-default-features --features alloc,raw_value
       - run: cargo check --features preserve_order
         if: matrix.rust != '1.53.0' && matrix.rust != '1.46.0' && matrix.rust != '1.45.0' && matrix.rust != '1.40.0' && matrix.rust != '1.38.0' && matrix.rust != '1.36.0'