diff --git a/test/build.py b/test/build.py
index 78fd9342a..8a9a44523 100644
--- a/test/build.py
+++ b/test/build.py
@@ -54,6 +54,7 @@ else:
         visual/report.cpp
         visual/runner.cpp
         visual/run.cpp
+        visual/parse_map_sizes.cpp
         """
         )
     test_program3 = test_env_local.Program('visual/run', source=source)
diff --git a/test/visual/map_sizes_grammar.hpp b/test/visual/parse_map_sizes.cpp
similarity index 55%
rename from test/visual/map_sizes_grammar.hpp
rename to test/visual/parse_map_sizes.cpp
index 2c79d90d8..7cea5df4a 100644
--- a/test/visual/map_sizes_grammar.hpp
+++ b/test/visual/parse_map_sizes.cpp
@@ -2,7 +2,7 @@
  *
  * This file is part of Mapnik (c++ mapping toolkit)
  *
- * Copyright (C) 2015 Artem Pavlenko
+ * Copyright (C) 2016 Artem Pavlenko
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -20,40 +20,36 @@
  *
  *****************************************************************************/
 
-#ifndef MAP_SIZES_GRAMMAR_HPP
-#define MAP_SIZES_GRAMMAR_HPP
+#include "parse_map_sizes.hpp"
 
 #pragma GCC diagnostic push
 #include <mapnik/warning_ignore.hpp>
-#include <boost/spirit/include/qi.hpp>
-#include <boost/spirit/include/phoenix.hpp>
+#include <boost/spirit/home/x3.hpp>
+#include <boost/fusion/include/adapt_struct.hpp>
 #pragma GCC diagnostic pop
 
-namespace visual_tests
-{
+BOOST_FUSION_ADAPT_STRUCT (
+    visual_tests::map_size,
+    (std::size_t, width)
+    (std::size_t, height)
+    )
 
-namespace qi = boost::spirit::qi;
-namespace ascii = boost::spirit::ascii;
+namespace visual_tests {
 
-template <typename Iterator>
-struct map_sizes_grammar : qi::grammar<Iterator, std::vector<map_size>(), ascii::space_type>
+namespace x3 = boost::spirit::x3;
+using x3::ulong_;
+auto const map_sizes_grammar = x3::rule<class map_sizes_grammar_type, std::vector<map_size> >{} =
+    (ulong_ >> ',' >> ulong_) % ';' ;
+
+void parse_map_sizes(std::string const & str, std::vector<map_size> & sizes)
 {
-    map_sizes_grammar() : map_sizes_grammar::base_type(start)
+    boost::spirit::x3::ascii::space_type space;
+    std::string::const_iterator iter = str.begin();
+    std::string::const_iterator end = str.end();
+    if (!boost::spirit::x3::phrase_parse(iter, end, map_sizes_grammar, space, sizes))
     {
-        using namespace boost::spirit::qi;
-        using namespace boost::phoenix;
-
-        int_type int_;
-        _1_type _1;
-        _2_type _2;
-        _val_type _val;
-
-        start = (int_ >> ',' >> int_)[push_back(_val, construct<map_size>(_1, _2))] % ';';
+        throw std::runtime_error("Failed to parse list of sizes: '" + str + "'");
     }
-
-    qi::rule<Iterator, std::vector<map_size>(), ascii::space_type> start;
-};
-
 }
 
-#endif
+}
diff --git a/test/visual/parse_map_sizes.hpp b/test/visual/parse_map_sizes.hpp
new file mode 100644
index 000000000..5d0f0125b
--- /dev/null
+++ b/test/visual/parse_map_sizes.hpp
@@ -0,0 +1,36 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2016 Artem Pavlenko
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+#ifndef VISUAL_TESTS_PARSE_MAP_SIZES_HPP
+#define VISUAL_TESTS_PARSE_MAP_SIZES_HPP
+
+#include "config.hpp"
+#include <vector>
+#include <string>
+
+namespace visual_tests {
+
+void parse_map_sizes(std::string const & str, std::vector<map_size> & sizes);
+
+}
+
+#endif //VISUAL_TESTS_PARSE_MAP_SIZES_HPP
diff --git a/test/visual/runner.cpp b/test/visual/runner.cpp
index d0c7222fb..18e6506ec 100644
--- a/test/visual/runner.cpp
+++ b/test/visual/runner.cpp
@@ -2,7 +2,7 @@
  *
  * This file is part of Mapnik (c++ mapping toolkit)
  *
- * Copyright (C) 2015 Artem Pavlenko
+ * Copyright (C) 2016 Artem Pavlenko
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -25,9 +25,11 @@
 #include <future>
 #include <atomic>
 
+
 #include <mapnik/load_map.hpp>
 
 #include "runner.hpp"
+#include "parse_map_sizes.hpp"
 
 namespace visual_tests
 {
@@ -348,19 +350,7 @@ result_list runner::test_one(runner::path_type const& style_path,
             }
         }
     }
-
     return results;
 }
 
-void runner::parse_map_sizes(std::string const & str, std::vector<map_size> & sizes) const
-{
-    boost::spirit::ascii::space_type space;
-    std::string::const_iterator iter = str.begin();
-    std::string::const_iterator end = str.end();
-    if (!boost::spirit::qi::phrase_parse(iter, end, map_sizes_parser_, space, sizes))
-    {
-        throw std::runtime_error("Failed to parse list of sizes: '" + str + "'");
-    }
-}
-
 }
diff --git a/test/visual/runner.hpp b/test/visual/runner.hpp
index e38e39422..b5c031627 100644
--- a/test/visual/runner.hpp
+++ b/test/visual/runner.hpp
@@ -2,7 +2,7 @@
  *
  * This file is part of Mapnik (c++ mapping toolkit)
  *
- * Copyright (C) 2015 Artem Pavlenko
+ * Copyright (C) 2016 Artem Pavlenko
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -26,7 +26,6 @@
 #include "config.hpp"
 #include "report.hpp"
 #include "renderer.hpp"
-#include "map_sizes_grammar.hpp"
 
 namespace visual_tests
 {
@@ -58,9 +57,7 @@ private:
     result_list test_one(path_type const & style_path,
                          report_type & report,
                          std::atomic<std::size_t> & fail_limit) const;
-    void parse_map_sizes(std::string const & str, std::vector<map_size> & sizes) const;
 
-    const map_sizes_grammar<std::string::const_iterator> map_sizes_parser_;
     const path_type styles_dir_;
     const config defaults_;
     const std::size_t jobs_;
@@ -71,4 +68,4 @@ private:
 
 }
 
-#endif
+#endif //VISUAL_TEST_RUNNER_HPP