diff --git a/src/lib.rs b/src/lib.rs
index aff31deb..b0369f6b 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,6 +5,7 @@ use serde::de::{Deserialize, IntoDeserializer};
 pub mod duration;
 pub mod empty;
 pub mod json_string;
+pub mod test;
 pub mod time;
 pub mod urlencoded;
 
@@ -48,18 +49,3 @@ where
         Some(s) => T::deserialize(s.into_deserializer()).map(Some),
     }
 }
-
-#[cfg(test)]
-use std::fmt::Debug;
-
-#[cfg(test)]
-use serde::{de::DeserializeOwned, Serialize};
-
-#[cfg(test)]
-pub fn serde_json_eq<T>(de: T, se: serde_json::Value)
-where
-    T: Clone + Debug + PartialEq + Serialize + DeserializeOwned,
-{
-    assert_eq!(se, serde_json::to_value(de.clone()).unwrap());
-    assert_eq!(de, serde_json::from_value(se).unwrap());
-}
diff --git a/src/test.rs b/src/test.rs
new file mode 100644
index 00000000..c828bbad
--- /dev/null
+++ b/src/test.rs
@@ -0,0 +1,13 @@
+//! Helpers for tests
+
+use std::fmt::Debug;
+
+use serde::{de::DeserializeOwned, Serialize};
+
+pub fn serde_json_eq<T>(de: T, se: serde_json::Value)
+where
+    T: Clone + Debug + PartialEq + Serialize + DeserializeOwned,
+{
+    assert_eq!(se, serde_json::to_value(de.clone()).unwrap());
+    assert_eq!(de, serde_json::from_value(se).unwrap());
+}