diff --git a/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/DefaultServletHttpRequestHandler.java b/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/DefaultServletHttpRequestHandler.java
index d2ed439e4e..b98d3740b4 100644
--- a/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/DefaultServletHttpRequestHandler.java
+++ b/spring-webmvc/src/main/java/org/springframework/web/servlet/resource/DefaultServletHttpRequestHandler.java
@@ -126,11 +126,11 @@ public class DefaultServletHttpRequestHandler implements HttpRequestHandler, Ser
 			throw new IllegalStateException("A RequestDispatcher could not be located for the default servlet '" +
 					this.defaultServletName + "'");
 		}
-		if (request.getDispatcherType() == DispatcherType.INCLUDE) {
-			rd.include(request, response);
+		if (request.getDispatcherType() != DispatcherType.INCLUDE) {
+			rd.forward(request, response);
 		}
 		else {
-			rd.forward(request, response);
+			rd.include(request, response);
 		}
 	}
 
diff --git a/spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/DefaultServletHandlerConfigurerTests.java b/spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/DefaultServletHandlerConfigurerTests.java
index 1cc33984b9..986fc067ad 100644
--- a/spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/DefaultServletHandlerConfigurerTests.java
+++ b/spring-webmvc/src/test/java/org/springframework/web/servlet/config/annotation/DefaultServletHandlerConfigurerTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import jakarta.servlet.RequestDispatcher;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
+import org.springframework.web.HttpRequestHandler;
 import org.springframework.web.servlet.handler.SimpleUrlHandlerMapping;
 import org.springframework.web.servlet.resource.DefaultServletHttpRequestHandler;
 import org.springframework.web.testfixture.servlet.MockHttpServletRequest;
@@ -60,51 +61,57 @@ public class DefaultServletHandlerConfigurerTests {
 	@Test
 	public void enable() throws Exception {
 		configurer.enable();
-		SimpleUrlHandlerMapping handlerMapping = configurer.buildHandlerMapping();
-		DefaultServletHttpRequestHandler handler = (DefaultServletHttpRequestHandler) handlerMapping.getUrlMap().get("/**");
+		SimpleUrlHandlerMapping mapping = configurer.buildHandlerMapping();
+		HttpRequestHandler handler = (DefaultServletHttpRequestHandler) mapping.getUrlMap().get("/**");
 
 		assertThat(handler).isNotNull();
-		assertThat(handlerMapping.getOrder()).isEqualTo(Integer.MAX_VALUE);
+		assertThat(mapping.getOrder()).isEqualTo(Integer.MAX_VALUE);
 
 		handler.handleRequest(new MockHttpServletRequest(), response);
 
-		String expected = "default";
-		assertThat(servletContext.url).as("The ServletContext was not called with the default servlet name").isEqualTo(expected);
-		assertThat(response.getForwardedUrl()).as("The request was not forwarded").isEqualTo(expected);
+		assertThat(servletContext.url)
+				.as("The ServletContext was not called with the default servlet name").isEqualTo("default");
+
+		assertThat(response.getForwardedUrl())
+				.as("The request was not forwarded").isEqualTo("default");
 	}
 
 	@Test
 	public void enableWithServletName() throws Exception {
 		configurer.enable("defaultServlet");
-		SimpleUrlHandlerMapping handlerMapping = configurer.buildHandlerMapping();
-		DefaultServletHttpRequestHandler handler = (DefaultServletHttpRequestHandler) handlerMapping.getUrlMap().get("/**");
+		SimpleUrlHandlerMapping mapping = configurer.buildHandlerMapping();
+		HttpRequestHandler handler = (DefaultServletHttpRequestHandler) mapping.getUrlMap().get("/**");
 
 		assertThat(handler).isNotNull();
-		assertThat(handlerMapping.getOrder()).isEqualTo(Integer.MAX_VALUE);
+		assertThat(mapping.getOrder()).isEqualTo(Integer.MAX_VALUE);
 
 		handler.handleRequest(new MockHttpServletRequest(), response);
 
-		String expected = "defaultServlet";
-		assertThat(servletContext.url).as("The ServletContext was not called with the default servlet name").isEqualTo(expected);
-		assertThat(response.getForwardedUrl()).as("The request was not forwarded").isEqualTo(expected);
+		assertThat(servletContext.url)
+				.as("The ServletContext was not called with the default servlet name").isEqualTo("defaultServlet");
+
+		assertThat(response.getForwardedUrl())
+				.as("The request was not forwarded").isEqualTo("defaultServlet");
 	}
 
-	@Test
+	@Test // gh-30113
 	public void handleIncludeRequest() throws Exception {
 		configurer.enable();
-		SimpleUrlHandlerMapping handlerMapping = configurer.buildHandlerMapping();
-		DefaultServletHttpRequestHandler handler = (DefaultServletHttpRequestHandler) handlerMapping.getUrlMap().get("/**");
+		SimpleUrlHandlerMapping mapping = configurer.buildHandlerMapping();
+		HttpRequestHandler handler = (DefaultServletHttpRequestHandler) mapping.getUrlMap().get("/**");
 
 		assertThat(handler).isNotNull();
-		assertThat(handlerMapping.getOrder()).isEqualTo(Integer.MAX_VALUE);
+		assertThat(mapping.getOrder()).isEqualTo(Integer.MAX_VALUE);
 
 		MockHttpServletRequest request = new MockHttpServletRequest();
 		request.setDispatcherType(DispatcherType.INCLUDE);
 		handler.handleRequest(request, response);
 
-		String expected = "default";
-		assertThat(servletContext.url).as("The ServletContext was not called with the default servlet name").isEqualTo(expected);
-		assertThat(response.getIncludedUrl()).as("The request was not included").isEqualTo(expected);
+		assertThat(servletContext.url)
+				.as("The ServletContext was not called with the default servlet name").isEqualTo("default");
+
+		assertThat(response.getIncludedUrl())
+				.as("The request was not included").isEqualTo("default");
 	}