diff --git a/IV. Spring Boot features/35.4.2. EnvironmentTestUtils.md b/IV. Spring Boot features/35.4.2. EnvironmentTestUtils.md
index e69de29..3e6f197 100644
--- a/IV. Spring Boot features/35.4.2. EnvironmentTestUtils.md	
+++ b/IV. Spring Boot features/35.4.2. EnvironmentTestUtils.md	
@@ -0,0 +1,5 @@
+### 35.4.2. EnvironmentTestUtils
+
+EnvironmentTestUtils允许你快速添加属性到一个ConfigurableEnvironment或ConfigurableApplicationContext。只需简单的使用key=value字符串调用它：
+```java
+EnvironmentTestUtils.addEnvironment(env, "org=Spring", "name=Boot");