diff --git a/src/inja.hpp b/src/inja.hpp
index 7e049ca..cf46c9e 100644
--- a/src/inja.hpp
+++ b/src/inja.hpp
@@ -335,9 +335,12 @@ public:
 	}
 
 	json eval_function(const Parsed::ElementExpression& element, json data) {
+		std::cout << "eval_function" << std::endl;
 		switch (element.function) {
 			case Parsed::Function::Upper: {
+				std::cout << "eval_function - upper" << std::endl;
 				std::string str = eval_expression<std::string>(element.args[0], data);
+				std::cout << "eval_function - upper - " << str << std::endl;
 				std::transform(str.begin(), str.end(), str.begin(), toupper);
 				return str;
 			}
@@ -547,11 +550,13 @@ public:
 		MatchType<Parsed::Function> match_function = match(input, regex_map_functions);
 		switch ( match_function.type() ) {
 			case Parsed::Function::ReadJson: {
+				std::cout << "parse read json" << std::endl;
 				Parsed::ElementExpression result = Parsed::ElementExpression(Parsed::Function::ReadJson);
 				result.command = match_function.str(1);
 				return result;
 			}
 			default: {
+				std::cout << "prase other function" << std::endl;
 				std::vector<Parsed::ElementExpression> args = {};
 				for (unsigned int i = 1; i < match_function.size(); i++) { // str(0) is whole group
 					args.push_back( parse_expression(match_function.str(i)) );
diff --git a/test/src/unit-renderer.cpp b/test/src/unit-renderer.cpp
index d31b718..e3c856f 100644
--- a/test/src/unit-renderer.cpp
+++ b/test/src/unit-renderer.cpp
@@ -7,7 +7,7 @@
 using json = nlohmann::json;
 
 
-TEST_CASE("types") {
+/* TEST_CASE("types") {
 	inja::Environment env = inja::Environment();
 	json data;
 	data["name"] = "Peter";
@@ -62,9 +62,9 @@ TEST_CASE("types") {
 		CHECK( env.render("{% if age == 28 %}28{% else if age == 29 %}29{% endif %}", data) == "29" );
 		CHECK( env.render("{% if age == 26 %}26{% else if age == 27 %}27{% else if age == 28 %}28{% else %}29{% endif %}", data) == "29" );
 	}
-}
+} */
 
-/* TEST_CASE("functions") {
+TEST_CASE("functions") {
 	inja::Environment env = inja::Environment();
 
 	json data;
@@ -75,14 +75,14 @@ TEST_CASE("types") {
 
 	SECTION("upper") {
 		CHECK( env.render("{{ upper(name) }}", data) == "PETER" );
-		CHECK( env.render("{{ upper(  name  ) }}", data) == "PETER" );
+		/* CHECK( env.render("{{ upper(  name  ) }}", data) == "PETER" );
 		CHECK( env.render("{{ upper(city) }}", data) == "NEW YORK" );
 		CHECK( env.render("{{ upper(upper(name)) }}", data) == "PETER" );
 		CHECK_THROWS_WITH( env.render("{{ upper(5) }}", data), "[json.exception.type_error.302] type must be string, but is number" );
-		CHECK_THROWS_WITH( env.render("{{ upper(true) }}", data), "[json.exception.type_error.302] type must be string, but is boolean" );
+		CHECK_THROWS_WITH( env.render("{{ upper(true) }}", data), "[json.exception.type_error.302] type must be string, but is boolean" ); */
 	}
 
-	SECTION("lower") {
+	/* SECTION("lower") {
 		CHECK( env.render("{{ lower(name) }}", data) == "peter" );
 		CHECK( env.render("{{ lower(city) }}", data) == "new york" );
 		CHECK_THROWS_WITH( env.render("{{ lower(5.45) }}", data), "[json.exception.type_error.302] type must be string, but is number" );
@@ -122,10 +122,10 @@ TEST_CASE("types") {
 		CHECK( env.render("{{ even(11) }}", data) == "false" );
 		CHECK( env.render("{{ even(12) }}", data) == "true" );
 		CHECK_THROWS_WITH( env.render("{{ even(name) }}", data), "[json.exception.type_error.302] type must be number, but is string" );
-	}
+	} */
 }
 
-TEST_CASE("combinations") {
+/* TEST_CASE("combinations") {
 	inja::Environment env = inja::Environment();
 	json data;
 	data["name"] = "Peter";
diff --git a/test/src/unit-string-helper.cpp b/test/src/unit-string-helper.cpp
index e4ef24d..d63d6b9 100644
--- a/test/src/unit-string-helper.cpp
+++ b/test/src/unit-string-helper.cpp
@@ -4,7 +4,7 @@
 
 
 
-TEST_CASE("dot to pointer") {
+/* TEST_CASE("dot to pointer") {
 	CHECK( inja::dot_to_json_pointer_notation("person.names.surname") == "/person/names/surname" );
 	CHECK( inja::dot_to_json_pointer_notation("guests.2") == "/guests/2" );
 }
@@ -158,4 +158,4 @@ TEST_CASE("match-functions") {
 
 	CHECK_THROWS_WITH( inja::match("test(var)", map_regex), "Could not match input: test(var)" );
 	CHECK_THROWS_WITH( inja::match("round(var)", map_regex), "Could not match input: round(var)" );
-}
+} */