diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5e492af..554873e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -41,6 +41,7 @@ jobs:
       - run: cargo test --workspace --exclude thiserror_no_std_test
       - run: cargo test --manifest-path tests/no-std/Cargo.toml
         if: matrix.rust != '1.70.0'
+      - run: cargo test --no-default-features
       - uses: actions/upload-artifact@v4
         if: matrix.rust == 'nightly' && always()
         with:
diff --git a/tests/test_backtrace.rs b/tests/test_backtrace.rs
index 2a4cffa..cc25676 100644
--- a/tests/test_backtrace.rs
+++ b/tests/test_backtrace.rs
@@ -1,3 +1,4 @@
+#![cfg(feature = "std")]
 #![cfg_attr(thiserror_nightly_testing, feature(error_generic_member_access))]
 
 use thiserror::Error;
diff --git a/tests/test_expr.rs b/tests/test_expr.rs
index 5678e84..1872fb5 100644
--- a/tests/test_expr.rs
+++ b/tests/test_expr.rs
@@ -1,6 +1,7 @@
 #![allow(clippy::iter_cloned_collect, clippy::uninlined_format_args)]
 
 use core::fmt::Display;
+#[cfg(feature = "std")]
 use std::path::PathBuf;
 use thiserror::Error;
 
diff --git a/tests/test_option.rs b/tests/test_option.rs
index fbdbec0..21cd5e1 100644
--- a/tests/test_option.rs
+++ b/tests/test_option.rs
@@ -1,3 +1,4 @@
+#![cfg(feature = "std")]
 #![cfg_attr(thiserror_nightly_testing, feature(error_generic_member_access))]
 
 #[cfg(thiserror_nightly_testing)]