diff --git a/recursive_wrapper.hpp b/recursive_wrapper.hpp
index 7af51a5..99c3ebf 100644
--- a/recursive_wrapper.hpp
+++ b/recursive_wrapper.hpp
@@ -1,9 +1,9 @@
-#ifndef UTIL_VARIANT_RECURSIVE_WRAPPER_HPP
-#define UTIL_VARIANT_RECURSIVE_WRAPPER_HPP
+#ifndef MAPBOX_UTIL_VARIANT_RECURSIVE_WRAPPER_HPP
+#define MAPBOX_UTIL_VARIANT_RECURSIVE_WRAPPER_HPP
 
 #include <utility>
 
-namespace util {
+namespace mapbox { namespace util {
 
 template <typename T>
 class recursive_wrapper
@@ -123,6 +123,6 @@ inline void swap(recursive_wrapper<T>& lhs, recursive_wrapper<T>& rhs) noexcept
     lhs.swap(rhs);
 }
 
-}
+}}
 
-#endif // UTIL_VARIANT_RECURSIVE_WRAPPER_HPP
+#endif // MAPBOX_UTIL_VARIANT_RECURSIVE_WRAPPER_HPP
diff --git a/test/bench_variant.cpp b/test/bench_variant.cpp
index e4be3f5..533994d 100644
--- a/test/bench_variant.cpp
+++ b/test/bench_variant.cpp
@@ -9,6 +9,9 @@
 
 #define TEXT "Testing various variant implementations with a longish string ........................................."
 //#define BOOST_VARIANT_MINIMIZE_SIZE
+
+using namespace mapbox;
+
 namespace test {
 
 template <typename V>
diff --git a/test/binary_visitor_test.cpp b/test/binary_visitor_test.cpp
index 8c0fa89..b3de952 100644
--- a/test/binary_visitor_test.cpp
+++ b/test/binary_visitor_test.cpp
@@ -10,6 +10,8 @@
 #include <boost/timer/timer.hpp>
 #include "variant.hpp"
 
+using namespace mapbox;
+
 namespace test {
 
 template <typename T>
diff --git a/test/recursive_wrapper_test.cpp b/test/recursive_wrapper_test.cpp
index 36616c2..a84e6f3 100644
--- a/test/recursive_wrapper_test.cpp
+++ b/test/recursive_wrapper_test.cpp
@@ -9,6 +9,8 @@
 #include <boost/timer/timer.hpp>
 #include "variant.hpp"
 
+using namespace mapbox;
+
 namespace test {
 
 struct add;
diff --git a/test/unique_ptr_test.cpp b/test/unique_ptr_test.cpp
index d760eeb..33edd01 100644
--- a/test/unique_ptr_test.cpp
+++ b/test/unique_ptr_test.cpp
@@ -9,6 +9,8 @@
 #include <boost/timer/timer.hpp>
 #include "variant.hpp"
 
+using namespace mapbox;
+
 namespace test {
 
 struct add;
diff --git a/test/unit.cpp b/test/unit.cpp
index 4f3c3b6..b981a8a 100644
--- a/test/unit.cpp
+++ b/test/unit.cpp
@@ -8,6 +8,8 @@
 #include <ostream>
 #include <memory>
 
+using namespace mapbox;
+
 TEST_CASE( "variant version", "[variant]" ) {
     unsigned int version = VARIANT_VERSION;
     REQUIRE(version == 100);
@@ -50,7 +52,7 @@ TEST_CASE( "variant should support built-in types", "[variant]" ) {
         // FIXME: does not compile: ./variant.hpp:340:14: error: use of overloaded operator '<<' is ambiguous (with operand types 'std::__1::basic_ostream<char>' and 'const nullptr_t')
         // https://github.com/mapbox/variant/issues/14
         //REQUIRE(v == util::variant<value_type>(nullptr));
-    }    
+    }
     SECTION( "unique_ptr" ) {
         typedef std::unique_ptr<std::string> value_type;
         util::variant<value_type> v(value_type(new std::string("hello")));
diff --git a/test/variant_hello_world.cpp b/test/variant_hello_world.cpp
index 6246772..7b52954 100644
--- a/test/variant_hello_world.cpp
+++ b/test/variant_hello_world.cpp
@@ -2,6 +2,8 @@
 #include <cstdint>
 #include <stdexcept>
 
+using mapbox;
+
 struct check : util::static_visitor<>
 {
     template <typename T>
diff --git a/variant.hpp b/variant.hpp
index bfb4546..39e7d7b 100644
--- a/variant.hpp
+++ b/variant.hpp
@@ -1,5 +1,5 @@
-#ifndef UTIL_VARIANT_HPP
-#define UTIL_VARIANT_HPP
+#ifndef MAPBOX_UTIL_VARIANT_HPP
+#define MAPBOX_UTIL_VARIANT_HPP
 
 #include <utility>
 #include <typeinfo>
@@ -34,9 +34,7 @@
 // translates to 100
 #define VARIANT_VERSION (VARIANT_MAJOR_VERSION*100000) + (VARIANT_MINOR_VERSION*100) + (VARIANT_PATCH_VERSION)
 
-namespace util {
-
-namespace detail {
+namespace mapbox { namespace util { namespace detail {
 
 static constexpr std::size_t invalid_value = std::size_t(-1);
 
@@ -545,6 +543,6 @@ operator<< (std::basic_ostream<charT,traits>& out, Variant const& rhs)
     return out;
 }
 
-}
+}}
 
-#endif  // UTIL_VARIANT_HPP
+#endif  // MAPBOX_UTIL_VARIANT_HPP