Skip boost::variant tests on unsupported compilers and versions of Boost
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 0d6ebfc..df77d43 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -114,8 +114,8 @@
endif()
endif()
-# Optional dependency for some tests
-find_package(Boost)
+# Optional dependency for some tests (boost::variant is only supported with version >= 1.56)
+find_package(Boost 1.56)
# Compile with compiler warnings turned on
function(pybind11_enable_warnings target_name)
diff --git a/tests/test_stl.cpp b/tests/test_stl.cpp
index 66fe9d1..0746fb4 100644
--- a/tests/test_stl.cpp
+++ b/tests/test_stl.cpp
@@ -13,7 +13,7 @@
// Test with `std::variant` in C++17 mode, or with `boost::variant` in C++11/14
#if PYBIND11_HAS_VARIANT
using std::variant;
-#elif PYBIND11_TEST_BOOST
+#elif defined(PYBIND11_TEST_BOOST) && (!defined(_MSC_VER) || _MSC_VER >= 1910)
# include <boost/variant.hpp>
# define PYBIND11_HAS_VARIANT 1
using boost::variant;