diff --git a/spring-boot/src/test/java/org/springframework/boot/context/embedded/AbstractEmbeddedServletContainerFactoryTests.java b/spring-boot/src/test/java/org/springframework/boot/context/embedded/AbstractEmbeddedServletContainerFactoryTests.java
index 3956a84ba8e..a551e2cdd10 100644
--- a/spring-boot/src/test/java/org/springframework/boot/context/embedded/AbstractEmbeddedServletContainerFactoryTests.java
+++ b/spring-boot/src/test/java/org/springframework/boot/context/embedded/AbstractEmbeddedServletContainerFactoryTests.java
@@ -110,7 +110,7 @@ public abstract class AbstractEmbeddedServletContainerFactoryTests {
 				.getEmbeddedServletContainer(exampleServletRegistration());
 		this.container.start();
 		this.container.stop();
-		// this.thrown.expect(Exception.class);
+		this.thrown.expect(IOException.class);
 		String response = getResponse(getLocalUrl("/hello"));
 		throw new RuntimeException(response);
 	}