diff --git a/CMakeLists.txt b/CMakeLists.txt
index 48de72a..b70ad1e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,9 @@ endif()
 
 include(CTest)
 
-if (CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING)
+if (CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING AND
+   (NOT MSVC OR NOT (MSVC_VERSION LESS 1800)) # Tests need at least VS2013
+   )
 add_subdirectory(tests)
 endif()
 
diff --git a/tests/test_util_file.c b/tests/test_util_file.c
index 65be9b9..3cc246d 100644
--- a/tests/test_util_file.c
+++ b/tests/test_util_file.c
@@ -19,6 +19,7 @@
 
 #include "json.h"
 #include "json_util.h"
+#include "snprintf_compat.h"
 
 static void test_read_valid_with_fd(const char *testdir);
 static void test_read_valid_nested_with_fd(const char *testdir);