diff --git a/test/src/unit-regression.cpp b/test/src/unit-regression.cpp
index c3ae57710..5c93f1e9e 100644
--- a/test/src/unit-regression.cpp
+++ b/test/src/unit-regression.cpp
@@ -185,7 +185,7 @@ namespace nlohmann
 template <>
 struct adl_serializer<NonDefaultFromJsonStruct>
 {
-    static NonDefaultFromJsonStruct from_json (json const&)
+    static NonDefaultFromJsonStruct from_json (json const&) noexcept
     {
         return {};
     }