diff --git a/rust_backend/crates/extensions/src/runtime.rs b/rust_backend/crates/extensions/src/runtime.rs
index bea8f9e0..bc562089 100644
--- a/rust_backend/crates/extensions/src/runtime.rs
+++ b/rust_backend/crates/extensions/src/runtime.rs
@@ -570,6 +570,9 @@ impl ExtensionRuntime {
 
     /// Native provider-manager entry point. Resolver/callback/retry time shares
     /// one allowance; established native media reads pause only that allowance.
+    // Public only for the integration tests in `tests/`; the download manager
+    // uses `call_download_provider`.
+    #[doc(hidden)]
     pub fn call_download(
         &self,
         method: &str,
diff --git a/rust_backend/crates/providers/src/lyrics/service.rs b/rust_backend/crates/providers/src/lyrics/service.rs
index 832cc50c..c7ef6c41 100644
--- a/rust_backend/crates/providers/src/lyrics/service.rs
+++ b/rust_backend/crates/providers/src/lyrics/service.rs
@@ -162,7 +162,8 @@ impl LyricsService {
         Ok(())
     }
 
-    pub fn cache_size(&self) -> usize {
+    #[cfg(test)]
+    pub(crate) fn cache_size(&self) -> usize {
         self.inner.cache.len()
     }
 
diff --git a/rust_backend/crates/providers/src/resolver/availability/cache.rs b/rust_backend/crates/providers/src/resolver/availability/cache.rs
index 0707b2ca..8789f0a5 100644
--- a/rust_backend/crates/providers/src/resolver/availability/cache.rs
+++ b/rust_backend/crates/providers/src/resolver/availability/cache.rs
@@ -148,7 +148,8 @@ impl AvailabilityService {
         self.with_raw(check, |resolver, check| album(resolver, id, check))
     }
 
-    pub fn check_from_deezer(
+    #[cfg(test)]
+    pub(crate) fn check_from_deezer(
         &self,
         id: &str,
         check: &Check<'_>,