diff --git a/README.md b/README.md
index fa1b6b0..b0a2f76 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@ R3
 
 [![Build Status](https://travis-ci.org/c9s/r3.svg?branch=2.0)](https://travis-ci.org/c9s/r3)
 
+[![Windows Build Status](https://img.shields.io/appveyor/ci/simon-p-r/r3/master.svg?label=windows&style=flat-square&maxAge=2592000)](https://ci.appveyor.com/project/simon-p-r/r3)
+
 [![Coverage Status](https://coveralls.io/repos/c9s/r3/badge.svg)](https://coveralls.io/r/c9s/r3)
 
 R3 is an URL router library with high performance, thus, it's implemented in C.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 4a5e411..1b9dc2d 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -1,6 +1,13 @@
 function(add_r3_test NAME)
   add_executable(${NAME} ${ARGN})
 
+  if(WIN32)
+    target_compile_definitions(${NAME}
+      PRIVATE
+      _CRT_SECURE_NO_WARNINGS
+    )
+  endif(WIN32)
+
   target_include_directories(${NAME}
     PRIVATE
       ${CHECK_INCLUDE_DIRS}