diff --git a/test/test_main.cpp b/test/test_main.cpp
index 980ae4c..b73823b 100644
--- a/test/test_main.cpp
+++ b/test/test_main.cpp
@@ -28,7 +28,7 @@ using namespace mstchtest;
         partials.insert(std::make_pair(partial_item.first, get<std::string>(partial_item.second))); \
     for(auto& data_item: get<mstch::map>(test["data"])) \
       if(data_item.first == "lambda") \
-        data_item.second = mstch::lambda{specs_lambdas[get<std::string>(test["name"])]}; \
+        data_item.second = mstch::lambda(specs_lambdas[get<std::string>(test["name"])]); \
     SECTION(get<std::string>(test["name"])) \
       REQUIRE(mstch::render( \
           get<std::string>(test["template"]), \