diff --git a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/ApplicationContextAssertProvider.java b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/ApplicationContextAssertProvider.java
index 00c267bc88..b6f07318bf 100644
--- a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/ApplicationContextAssertProvider.java
+++ b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/ApplicationContextAssertProvider.java
@@ -27,7 +27,7 @@ import org.springframework.util.Assert;
 
 /**
  * An {@link ApplicationContext} that additionally supports AssertJ style assertions. Can
- * be used to decorate and existing application context or an application context that
+ * be used to decorate an existing application context or an application context that
  * failed to start.
  * <p>
  * Assertions can be applied using the standard AssertJ {@code assertThat(...)} style (see
diff --git a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableApplicationContext.java b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableApplicationContext.java
index 9195ad50b9..a554371175 100644
--- a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableApplicationContext.java
+++ b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableApplicationContext.java
@@ -24,7 +24,7 @@ import org.springframework.context.ConfigurableApplicationContext;
 
 /**
  * An {@link ApplicationContext} that additionally supports AssertJ style assertions. Can
- * be used to decorate and existing application context or an application context that
+ * be used to decorate an existing application context or an application context that
  * failed to start.
  * <p>
  * See {@link ApplicationContextAssertProvider} for more details.
diff --git a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableReactiveWebApplicationContext.java b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableReactiveWebApplicationContext.java
index 418cff4301..868e6194ee 100644
--- a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableReactiveWebApplicationContext.java
+++ b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableReactiveWebApplicationContext.java
@@ -23,7 +23,7 @@ import org.springframework.boot.web.reactive.context.ReactiveWebApplicationConte
 
 /**
  * A {@link ReactiveWebApplicationContext} that additionally supports AssertJ style
- * assertions. Can be used to decorate and existing reactive web application context or an
+ * assertions. Can be used to decorate an existing reactive web application context or an
  * application context that failed to start.
  * <p>
  * See {@link ApplicationContextAssertProvider} for more details.
diff --git a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableWebApplicationContext.java b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableWebApplicationContext.java
index 9778420f48..a7ff4e5b44 100644
--- a/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableWebApplicationContext.java
+++ b/spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/assertj/AssertableWebApplicationContext.java
@@ -24,7 +24,7 @@ import org.springframework.web.context.WebApplicationContext;
 
 /**
  * A {@link WebApplicationContext} that additionally supports AssertJ style assertions.
- * Can be used to decorate and existing servlet web application context or an application
+ * Can be used to decorate an existing servlet web application context or an application
  * context that failed to start.
  * <p>
  * See {@link ApplicationContextAssertProvider} for more details.