diff --git a/src/function/mod.rs b/src/function/mod.rs
index 87d6aad..acb5fcd 100644
--- a/src/function/mod.rs
+++ b/src/function/mod.rs
@@ -693,6 +693,7 @@ impl Functions {
         self.declarations.extend(jobs::job_function_declarations());
     }
 
+    #[cfg(test)]
     pub fn append_declaration(&mut self, declaration: FunctionDeclaration) {
         self.declarations.push(declaration);
     }