diff --git a/framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.java b/framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.java
index a2de87a9b81..68135ff334f 100644
--- a/framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.java
+++ b/framework-docs/src/main/java/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.java
@@ -29,7 +29,7 @@ public class ExceptionController {
 
 	// tag::narrow[]
 	@ExceptionHandler({FileSystemException.class, RemoteException.class})
-	public ResponseEntity<String> handleIoException(IOException ex) {
+	public ResponseEntity<String> handleIOException(IOException ex) {
 		return ResponseEntity.internalServerError().body(ex.getMessage());
 	}
 	// end::narrow[]
diff --git a/framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.kt b/framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.kt
index dda49e8f08b..2843a077286 100644
--- a/framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.kt
+++ b/framework-docs/src/main/kotlin/org/springframework/docs/web/webmvc/mvccontroller/mvcannexceptionhandlerexc/ExceptionController.kt
@@ -27,7 +27,7 @@ class ExceptionController {
 
 	// tag::narrow[]
 	@ExceptionHandler(FileSystemException::class, RemoteException::class)
-	fun handleIoException(ex: IOException): ResponseEntity<String> {
+	fun handleIOException(ex: IOException): ResponseEntity<String> {
 		return ResponseEntity.internalServerError().body(ex.message)
 	}
 	// end::narrow[]
diff --git a/spring-web/src/test/java/org/springframework/web/client/RestTemplateObservationTests.java b/spring-web/src/test/java/org/springframework/web/client/RestTemplateObservationTests.java
index 8ec958df523..442fe5593ce 100644
--- a/spring-web/src/test/java/org/springframework/web/client/RestTemplateObservationTests.java
+++ b/spring-web/src/test/java/org/springframework/web/client/RestTemplateObservationTests.java
@@ -149,7 +149,7 @@ class RestTemplateObservationTests {
 	}
 
 	@Test
-	void executeWithIoExceptionAddsUnknownOutcome() throws Exception {
+	void executeWithIOExceptionAddsUnknownOutcome() throws Exception {
 		String url = "https://example.org/resource";
 		mockSentRequest(GET, url);
 		given(request.execute()).willThrow(new IOException("Socket failure"));
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ExceptionHandlerExceptionResolverTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ExceptionHandlerExceptionResolverTests.java
index 0f61a24734b..38af2470ce5 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ExceptionHandlerExceptionResolverTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/ExceptionHandlerExceptionResolverTests.java
@@ -172,7 +172,7 @@ class ExceptionHandlerExceptionResolverTests {
 	@Test
 	void resolveNoExceptionHandlerForException() throws NoSuchMethodException {
 		Exception npe = new NullPointerException();
-		HandlerMethod handlerMethod = new HandlerMethod(new IoExceptionController(), "handle");
+		HandlerMethod handlerMethod = new HandlerMethod(new IOExceptionController(), "handle");
 		this.resolver.afterPropertiesSet();
 		ModelAndView mav = this.resolver.resolveException(this.request, this.response, handlerMethod, npe);
 
@@ -540,7 +540,7 @@ class ExceptionHandlerExceptionResolverTests {
 
 
 	@Controller
-	static class IoExceptionController {
+	static class IOExceptionController {
 
 		public void handle() {}
 
diff --git a/spring-websocket/src/test/java/org/springframework/web/socket/sockjs/transport/session/SockJsSessionTests.java b/spring-websocket/src/test/java/org/springframework/web/socket/sockjs/transport/session/SockJsSessionTests.java
index d12659038a4..14ab2839659 100644
--- a/spring-websocket/src/test/java/org/springframework/web/socket/sockjs/transport/session/SockJsSessionTests.java
+++ b/spring-websocket/src/test/java/org/springframework/web/socket/sockjs/transport/session/SockJsSessionTests.java
@@ -240,7 +240,7 @@ class SockJsSessionTests extends AbstractSockJsSessionTests<TestSockJsSession> {
 	}
 
 	@Test
-	void writeFrameIoException() throws Exception {
+	void writeFrameIOException() throws Exception {
 		this.session.setExceptionOnWrite(new IOException());
 		this.session.delegateConnectionEstablished();