diff --git a/test/entt/entity/poly_storage.cpp b/test/entt/entity/poly_storage.cpp
deleted file mode 100644
index 9afe7d389..000000000
--- a/test/entt/entity/poly_storage.cpp
+++ /dev/null
@@ -1,139 +0,0 @@
-#include <cstddef>
-#include <gtest/gtest.h>
-#include <entt/core/utility.hpp>
-#include <entt/entity/poly_storage.hpp>
-#include <entt/entity/registry.hpp>
-
-template<typename... Type>
-entt::type_list<Type...> as_type_list(const entt::type_list<Type...> &);
-
-template<typename Entity>
-struct PolyStorage
-    : entt::type_list_cat_t<
-          decltype(as_type_list(std::declval<entt::Storage<Entity>>())),
-          entt::type_list<
-              void(const Entity *, const Entity *),
-              void(const Entity, const void *),
-              const void *(const Entity) const,
-              void(entt::basic_registry<Entity> &) const>> {
-    using entity_type = Entity;
-    using size_type = std::size_t;
-
-    template<typename Base>
-    struct type: entt::Storage<Entity>::template type<Base> {
-        static constexpr auto base = decltype(as_type_list(std::declval<entt::Storage<Entity>>()))::size;
-
-        void erase(const entity_type *first, const entity_type *last) {
-            entt::poly_call<base + 0>(*this, first, last);
-        }
-
-        void emplace(const entity_type entity, const void *instance) {
-            entt::poly_call<base + 1>(*this, entity, instance);
-        }
-
-        const void *get(const entity_type entity) const {
-            return entt::poly_call<base + 2>(*this, entity);
-        }
-
-        void copy_to(entt::basic_registry<Entity> &other) const {
-            entt::poly_call<base + 3>(*this, other);
-        }
-    };
-
-    template<typename Type>
-    struct members {
-        static void emplace(Type &self, const entity_type entity, const void *instance) {
-            self.emplace(entity, *static_cast<const typename Type::value_type *>(instance));
-        }
-
-        static const typename Type::value_type *get(const Type &self, const entity_type entity) {
-            return &self.get(entity);
-        }
-
-        static void copy_to(const Type &self, entt::basic_registry<entity_type> &other) {
-            const entt::sparse_set &base = self;
-            other.template insert<typename Type::value_type>(base.rbegin(), base.rend(), self.rbegin());
-        }
-    };
-
-    template<typename Type>
-    using impl = entt::value_list_cat_t<
-        typename entt::Storage<Entity>::template impl<Type>,
-        entt::value_list<
-            &Type::template erase<const entity_type *>,
-            &members<Type>::emplace,
-            &members<Type>::get,
-            &members<Type>::copy_to>>;
-};
-
-template<typename Entity>
-struct entt::poly_storage_traits<Entity> {
-    using storage_type = entt::poly<PolyStorage<Entity>>;
-};
-
-TEST(PolyStorage, CopyEntity) {
-    entt::registry registry;
-    const auto entity = registry.create();
-    const auto other = registry.create();
-
-    registry.emplace<int>(entity, 42);
-    registry.emplace<char>(entity, 'c');
-
-    ASSERT_TRUE((registry.all_of<int, char>(entity)));
-    ASSERT_FALSE((registry.any_of<int, char>(other)));
-
-    registry.visit(entity, [&](const auto &info) {
-        auto &&storage = registry.storage(info);
-        storage->emplace(other, storage->get(entity));
-    });
-
-    ASSERT_TRUE((registry.all_of<int, char>(entity)));
-    ASSERT_TRUE((registry.all_of<int, char>(other)));
-
-    ASSERT_EQ(registry.get<int>(entity), registry.get<int>(other));
-    ASSERT_EQ(registry.get<char>(entity), registry.get<char>(other));
-}
-
-TEST(PolyStorage, CopyRegistry) {
-    entt::registry registry;
-    entt::registry other;
-    entt::entity entities[10u];
-
-    registry.create(std::begin(entities), std::end(entities));
-    registry.insert<int>(std::begin(entities), std::end(entities), 42);
-    registry.insert<char>(std::begin(entities), std::end(entities), 'c');
-
-    ASSERT_EQ(registry.size(), 10u);
-    ASSERT_EQ(other.size(), 0u);
-
-    other.assign(registry.data(), registry.data() + registry.size(), registry.released());
-    registry.visit([&](const auto &info) { std::as_const(registry).storage(info)->copy_to(other); });
-
-    ASSERT_EQ(registry.size(), other.size());
-    ASSERT_EQ((registry.view<int, char>().size_hint()), (other.view<int, char>().size_hint()));
-    ASSERT_NE((other.view<int, char>().size_hint()), 0u);
-
-    for(const auto entity: registry.view<int, char>()) {
-        ASSERT_EQ((registry.get<int, char>(entity)), (other.get<int, char>(entity)));
-    }
-}
-
-TEST(PolyStorage, Constness) {
-    entt::registry registry;
-    const auto &cregistry = registry;
-
-    entt::entity entity[1];
-    entity[0] = registry.create();
-    registry.emplace<int>(entity[0], 42);
-
-    // cannot invoke erase on a const storage, let's copy the returned value
-    auto cstorage = cregistry.storage(entt::type_id<int>());
-
-    ASSERT_DEATH(cstorage->erase(std::begin(entity), std::end(entity)), "");
-    ASSERT_TRUE(registry.all_of<int>(entity[0]));
-
-    auto &&storage = registry.storage(entt::type_id<int>());
-    storage->erase(std::begin(entity), std::end(entity));
-
-    ASSERT_FALSE(registry.all_of<int>(entity[0]));
-}