diff --git a/tests/src/unit-regression3.cpp b/tests/src/unit-regression3.cpp
index 2f41789fc..11c6a7da8 100644
--- a/tests/src/unit-regression3.cpp
+++ b/tests/src/unit-regression3.cpp
@@ -913,7 +913,7 @@ TEST_CASE("regression test #5476 - array type without reserve()")
         CHECK(deque_json::from_msgpack(deque_json::to_msgpack(j)) == j);
 
         // parse() instantiates the callback parser as well, which reserves too
-        const auto with_callback = deque_json::parse(R"([1,2,3])", [](int /*depth*/, deque_json::parse_event_t /*event*/, deque_json& /*parsed*/)
+        const auto with_callback = deque_json::parse(R"([1,2,3])", [](int /*depth*/, deque_json::parse_event_t /*event*/, deque_json& /*parsed*/) noexcept
         {
             return true;
         });