diff --git a/test/common/boxed_type.h b/test/common/boxed_type.h
index 0ab121fdd..90e07e37a 100644
--- a/test/common/boxed_type.h
+++ b/test/common/boxed_type.h
@@ -6,6 +6,10 @@ namespace test {
 template<typename Type>
 struct boxed_type {
     Type value{};
+
+    operator Type() const noexcept {
+        return value;
+    }
 };
 
 template<typename Type>