diff --git a/test/models/author.hpp b/test/models/author.hpp
index 7a7f583..1c8b892 100644
--- a/test/models/author.hpp
+++ b/test/models/author.hpp
@@ -15,6 +15,7 @@ struct author
   std::string date_of_birth;
   unsigned short year_of_birth{};
   bool distinguished{false};
+  std::vector<matador::sql::entity<book>> books;
 
   template<typename Operator>
   void process(Operator &op)
@@ -26,6 +27,7 @@ struct author
     field::attribute(op, "date_of_birth", date_of_birth, 31);
     field::attribute(op, "year_of_birth", year_of_birth);
     field::attribute(op, "distinguished", distinguished);
+    field::has_many(op, "books", books, "author_id", "id", utils::fetch_type::LAZY);
   }
 };
 
diff --git a/test/models/book.hpp b/test/models/book.hpp
index a3e7401..2e645b8 100644
--- a/test/models/book.hpp
+++ b/test/models/book.hpp
@@ -25,7 +25,7 @@ struct book
     namespace field = matador::utils::access;
     field::primary_key(op, "id", id);
     field::attribute(op, "title", title, 511);
-    field::has_one(op, "author_id", book_author, utils::fetch_type::EAGER);
+    field::belongs_to(op, "author_id", book_author, utils::fetch_type::EAGER);
     field::attribute(op, "published_in", published_in);
   }
 };
diff --git a/test/models/recipe.hpp b/test/models/recipe.hpp
index b4087e2..fd6e310 100644
--- a/test/models/recipe.hpp
+++ b/test/models/recipe.hpp
@@ -11,16 +11,19 @@
 
 namespace matador::test {
 
+struct recipe;
 struct ingredient
 {
   unsigned long id{};
   std::string name;
+  std::vector<matador::sql::entity<recipe>> recipes;
 
   template<class Operator>
   void process(Operator &op) {
     namespace field = matador::utils::access;
     field::primary_key(op, "id", id);
     field::attribute(op, "name", name, 255);
+    field::has_many(op, "recipes", recipes, "ingredient_id", "recipe_id", utils::fetch_type::EAGER);
   }
 };
 
@@ -28,12 +31,14 @@ struct recipe
 {
   unsigned long id{};
   std::string name;
+  std::vector<matador::sql::entity<ingredient>> ingredients;
 
   template<class Operator>
   void process(Operator &op) {
     namespace field = matador::utils::access;
     field::primary_key(op, "id", id);
     field::attribute(op, "name", name, 255);
+    field::has_many(op, "ingredients", ingredients, "recipe_id", "ingredient_id", utils::fetch_type::EAGER);
   }
 };