diff --git a/tests/src/utils/conv_container.hpp b/tests/src/utils/conv_container.hpp
new file mode 100644
index 0000000..3806a2a
--- /dev/null
+++ b/tests/src/utils/conv_container.hpp
@@ -0,0 +1,19 @@
+#pragma once
+
+#include <algorithm>
+
+namespace utils
+{
+
+template <class R, class T, class... Args,
+          template <class, class...> class Container>
+auto convContainer(const Container<T, Args...>& container)
+{
+    Container<R> result;
+    std::transform(container.begin(), container.end(),
+                   std::back_inserter(result),
+                   [](const auto& item) -> R { return item; });
+    return result;
+}
+
+} // namespace utils