diff --git a/src/json.rs b/src/json.rs
index 389ca4a..f5b31b9 100644
--- a/src/json.rs
+++ b/src/json.rs
@@ -1,3 +1,8 @@
+#![cfg_attr(
+    not(any(feature = "http-client", feature = "async-http-client")),
+    allow(dead_code)
+)]
+
 use crate::Error;
 
 /// Shortcut for [`serde_json::from_str`] with [`crate::Error`].
diff --git a/src/lib.rs b/src/lib.rs
index 1838815..14b7f82 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,7 +25,7 @@ mod client_reqwest;
 #[cfg(feature = "http-client")]
 mod client_ureq;
 mod error;
-#[cfg(any(feature = "http-client", feature = "async-http-client"))]
+#[cfg(any(test, feature = "http-client", feature = "async-http-client"))]
 mod json;
 mod macros;
 pub mod objects;