diff --git a/test/src/unit-regression2.cpp b/test/src/unit-regression2.cpp
index 65683e906..9f31a2059 100644
--- a/test/src/unit-regression2.cpp
+++ b/test/src/unit-regression2.cpp
@@ -856,7 +856,7 @@ TEST_CASE("regression tests 2")
         try
         {
             // std::map<std::string, std::string> j // no leak
-            nlohmann::json j // leak
+            nlohmann::json::initializer_list_t j // leak
             {
                 {"smth", f_3215(true)}, // exception thrown here
                 {"smth", f_3215(false)}