diff --git a/test/invoke_md_constexpr_test.cpp b/test/invoke_md_constexpr_test.cpp
index 9f8013e..11e38f4 100644
--- a/test/invoke_md_constexpr_test.cpp
+++ b/test/invoke_md_constexpr_test.cpp
@@ -5,7 +5,6 @@
 #include <boost/compat/invoke.hpp>
 #include <boost/config.hpp>
 #include <boost/config/workaround.hpp>
-#include <functional>
 
 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
 #define BOOST_TEST_EQ(x, y) STATIC_ASSERT((x) == (y))
diff --git a/test/invoke_mfn_constexpr_test.cpp b/test/invoke_mfn_constexpr_test.cpp
index 62c2b22..15f95d3 100644
--- a/test/invoke_mfn_constexpr_test.cpp
+++ b/test/invoke_mfn_constexpr_test.cpp
@@ -9,7 +9,6 @@
 #include <boost/compat/invoke.hpp>
 #include <boost/config.hpp>
 #include <boost/config/workaround.hpp>
-#include <functional>
 
 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
 #define BOOST_TEST_EQ(x, y) STATIC_ASSERT((x) == (y))