diff --git a/test/data/complex.hpp b/test/data/complex.hpp
index 481580d..a438098 100644
--- a/test/data/complex.hpp
+++ b/test/data/complex.hpp
@@ -5,9 +5,9 @@ private:
   std::string m_url;
 public:
   complex_item(const std::string& name, bool current, const std::string& url):
-      m_name{name}, m_current{current}, m_url{url}
+      m_name(name), m_current(current), m_url(url)
   {
-    register_methods(this, {
+    register_methods(this, std::map<std::string,mstch::node(complex_item::*)()>{
       {"name", &complex_item::name}, {"current", &complex_item::current},
       {"url", &complex_item::url},   {"link", &complex_item::link}
     });
@@ -36,14 +36,14 @@ private:
   mstch::array m_item;
 public:
   complex():
-      m_header{"Colors"},
-      m_item{
+      m_header("Colors"),
+      m_item(mstch::array{
         std::make_shared<complex_item>("red", true, "#Red"),
         std::make_shared<complex_item>("green", false, "#Green"),
         std::make_shared<complex_item>("blue", false, "#Blue")
-      }
+      })
   {
-    register_methods(this, {
+    register_methods(this, std::map<std::string,mstch::node(complex::*)()>{
       {"header", &complex::header}, {"item", &complex::item},
       {"list", &complex::list}, {"empty", &complex::empty}
     });
diff --git a/test/data/dot_notation.hpp b/test/data/dot_notation.hpp
index 9a6574d..c287107 100644
--- a/test/data/dot_notation.hpp
+++ b/test/data/dot_notation.hpp
@@ -4,9 +4,9 @@ private:
   mstch::map m_currency;
 public:
   dot_notation_price():
-    m_value{200}, m_currency{{"symbol", std::string{"$"}}, {"name", std::string{"USD"}}}
+    m_value(200), m_currency(mstch::map{{"symbol", std::string{"$"}}, {"name", std::string{"USD"}}})
   {
-    register_methods(this, {
+    register_methods(this, std::map<std::string,mstch::node(dot_notation_price::*)()>{
       {"value", &dot_notation_price::value},
       {"vat", &dot_notation_price::vat},
       {"currency", &dot_notation_price::currency}});
diff --git a/test/data/higher_order_sections.hpp b/test/data/higher_order_sections.hpp
index d99a5a5..ef2582c 100644
--- a/test/data/higher_order_sections.hpp
+++ b/test/data/higher_order_sections.hpp
@@ -2,8 +2,8 @@ class higher_order_sections: public mstch::object {
  private:
   std::string m_helper;
  public:
-  higher_order_sections(): m_helper{"To tinker?"} {
-    register_methods(this, {
+  higher_order_sections(): m_helper("To tinker?") {
+    register_methods(this, std::map<std::string,mstch::node(higher_order_sections::*)()>{
         {"name", &higher_order_sections::name},
         {"helper", &higher_order_sections::helper},
         {"bolder", &higher_order_sections::bolder}
diff --git a/test/data/partial_view.hpp b/test/data/partial_view.hpp
index 09869a8..5c2c3eb 100644
--- a/test/data/partial_view.hpp
+++ b/test/data/partial_view.hpp
@@ -3,8 +3,8 @@ private:
   int m_value;
 
 public:
-    partial_view(): m_value{10000} {
-    register_methods(this, {
+    partial_view(): m_value(10000) {
+    register_methods(this, std::map<std::string,mstch::node(partial_view::*)()>{
       {"greeting", &partial_view::greeting},
       {"farewell", &partial_view::farewell},
       {"name", &partial_view::name},
diff --git a/test/data/partial_whitespace.hpp b/test/data/partial_whitespace.hpp
index f61447c..85fa5dc 100644
--- a/test/data/partial_whitespace.hpp
+++ b/test/data/partial_whitespace.hpp
@@ -2,8 +2,8 @@ class partial_whitespace: public mstch::object {
 private:
   int m_value;
 public:
-  partial_whitespace(): m_value{10000} {
-    register_methods(this, {
+  partial_whitespace(): m_value(10000) {
+    register_methods(this, std::map<std::string,mstch::node(partial_whitespace::*)()>{
       {"greeting", &partial_whitespace::greeting},
       {"farewell", &partial_whitespace::farewell},
       {"name", &partial_whitespace::name},
diff --git a/test/data/simple.hpp b/test/data/simple.hpp
index a2a64c3..254a6d3 100644
--- a/test/data/simple.hpp
+++ b/test/data/simple.hpp
@@ -3,9 +3,9 @@ private:
   int m_value;
 public:
   simple():
-    m_value{10000}
+    m_value(10000)
   {
-    register_methods(this, {
+    register_methods(this, std::map<std::string,mstch::node(simple::*)()>{
       {"name", &simple::name},
       {"value", &simple::value},
       {"taxed_value", &simple::taxed_value},