diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 5d625ae140..1f8568549f 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -181,14 +181,12 @@ jobs:
       - uses: Swatinem/rust-cache@v2
 
       - name: check --feature-powerset
-        run: cargo hack --no-dev-deps check --feature-powerset --depth 2 --skip ffi,tracing
-        env:
-          RUSTFLAGS: "-D dead_code -D unused_imports"
+        run: cargo hack --no-dev-deps check --feature-powerset --depth 2 --features __deny_warnings --skip ffi,tracing
 
       - name: check --feature-powerset with tracing feature
-        run: cargo hack --no-dev-deps check --feature-powerset --depth 2 --features tracing --skip ffi
+        run: cargo hack --no-dev-deps check --feature-powerset --depth 2 --features tracing,__deny_warnings --skip ffi
         env:
-          RUSTFLAGS: "--cfg hyper_unstable_tracing -D dead_code -D unused_imports"
+          RUSTFLAGS: "--cfg hyper_unstable_tracing"
 
   ffi:
     name: Test C API (FFI)
diff --git a/Cargo.toml b/Cargo.toml
index 7f372a27ed..947e34c04f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -96,6 +96,7 @@ capi = []
 tracing = ["dep:tracing"]
 
 # internal features used in CI
+__deny_warnings = []
 nightly = []
 
 [lints.rust.unexpected_cfgs]
diff --git a/src/lib.rs b/src/lib.rs
index 8d6e2d2d5a..c7894a608a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,8 +1,10 @@
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
 #![cfg_attr(test, deny(rust_2018_idioms))]
-#![cfg_attr(all(test, feature = "full"), deny(unreachable_pub))]
-#![cfg_attr(all(test, feature = "full"), deny(warnings))]
+#![cfg_attr(
+    any(all(test, feature = "full"), feature = "__deny_warnings"),
+    deny(warnings, unreachable_pub)
+)]
 #![cfg_attr(all(test, feature = "nightly"), feature(test))]
 #![cfg_attr(docsrs, feature(doc_cfg))]