diff --git a/buildSrc/src/main/java/org/springframework/boot/build/SyncAppSource.java b/buildSrc/src/main/java/org/springframework/boot/build/SyncAppSource.java
index 1a8204805c5..9d274b81157 100644
--- a/buildSrc/src/main/java/org/springframework/boot/build/SyncAppSource.java
+++ b/buildSrc/src/main/java/org/springframework/boot/build/SyncAppSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2021 the original author or authors.
+ * Copyright 2021-2021 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.
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfigurationTests.java
index e3af2141ea2..59edb80ea7b 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfigurationTests.java
@@ -52,7 +52,6 @@ import org.springframework.context.i18n.LocaleContext;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.convert.ConversionService;
-import org.springframework.core.io.ClassPathResource;
 import org.springframework.format.Parser;
 import org.springframework.format.Printer;
 import org.springframework.format.support.FormattingConversionService;
@@ -161,12 +160,13 @@ class WebFluxAutoConfigurationTests {
 			SimpleUrlHandlerMapping hm = context.getBean("resourceHandlerMapping", SimpleUrlHandlerMapping.class);
 			assertThat(hm.getUrlMap().get("/**")).isInstanceOf(ResourceWebHandler.class);
 			ResourceWebHandler staticHandler = (ResourceWebHandler) hm.getUrlMap().get("/**");
-			assertThat(staticHandler.getLocations()).hasSize(4);
+			assertThat(staticHandler).extracting("locationValues").asList().hasSize(4);
+			assertThat(staticHandler.getLocations()).hasSize(1);
+			assertThat(staticHandler.getLocations().get(0)).hasToString("class path resource [public/]");
 			assertThat(hm.getUrlMap().get("/webjars/**")).isInstanceOf(ResourceWebHandler.class);
 			ResourceWebHandler webjarsHandler = (ResourceWebHandler) hm.getUrlMap().get("/webjars/**");
-			assertThat(webjarsHandler.getLocations()).hasSize(1);
-			assertThat(webjarsHandler.getLocations().get(0))
-					.isEqualTo(new ClassPathResource("/META-INF/resources/webjars/"));
+			assertThat(webjarsHandler).extracting("locationValues").asList()
+					.containsExactly("classpath:/META-INF/resources/webjars/");
 		});
 	}
 
@@ -176,7 +176,7 @@ class WebFluxAutoConfigurationTests {
 			SimpleUrlHandlerMapping hm = context.getBean("resourceHandlerMapping", SimpleUrlHandlerMapping.class);
 			assertThat(hm.getUrlMap().get("/static/**")).isInstanceOf(ResourceWebHandler.class);
 			ResourceWebHandler staticHandler = (ResourceWebHandler) hm.getUrlMap().get("/static/**");
-			assertThat(staticHandler.getLocations()).hasSize(4);
+			assertThat(staticHandler).extracting("locationValues").asList().hasSize(4);
 		});
 	}
 
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfigurationTests.java
index 3b9d06d2680..2e50b5ce392 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfigurationTests.java
@@ -22,6 +22,7 @@ import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.FormatStyle;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Date;
 import java.util.LinkedHashMap;
@@ -175,8 +176,10 @@ class WebMvcAutoConfigurationTests {
 	void resourceHandlerMapping() {
 		this.contextRunner.run((context) -> {
 			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
-			assertThat(locations.get("/**")).hasSize(2);
-			assertThat(locations.get("/webjars/**")).hasSize(0);
+			assertThat(locations.get("/**")).hasSize(5);
+			assertThat(locations.get("/webjars/**")).hasSize(1);
+			assertThat(locations.get("/webjars/**").get(0))
+					.isEqualTo(new ClassPathResource("/META-INF/resources/webjars/"));
 			assertThat(getResourceResolvers(context, "/webjars/**")).hasSize(1);
 			assertThat(getResourceTransformers(context, "/webjars/**")).hasSize(0);
 			assertThat(getResourceResolvers(context, "/**")).hasSize(1);
@@ -188,17 +191,17 @@ class WebMvcAutoConfigurationTests {
 	void customResourceHandlerMapping() {
 		this.contextRunner.withPropertyValues("spring.mvc.static-path-pattern:/static/**").run((context) -> {
 			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
-			assertThat(locations.get("/static/**")).hasSize(2);
+			assertThat(locations.get("/static/**")).hasSize(5);
 			assertThat(getResourceResolvers(context, "/static/**")).hasSize(1);
 		});
 	}
 
 	@Test
 	void resourceHandlerMappingOverrideWebjars() {
-		this.contextRunner.withUserConfiguration(WebJarsResources.class).run((context) -> {
+		this.contextRunner.withUserConfiguration(WebJars.class).run((context) -> {
 			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
 			assertThat(locations.get("/webjars/**")).hasSize(1);
-			assertThat(locations.get("/webjars/**").get(0).getFilename()).isEqualTo("test");
+			assertThat(locations.get("/webjars/**").get(0)).isEqualTo(new ClassPathResource("/foo/"));
 		});
 	}
 
@@ -207,7 +210,7 @@ class WebMvcAutoConfigurationTests {
 		this.contextRunner.withUserConfiguration(AllResources.class).run((context) -> {
 			Map<String, List<Resource>> locations = getResourceMappingLocations(context);
 			assertThat(locations.get("/**")).hasSize(1);
-			assertThat(locations.get("/**").get(0).getFilename()).isEqualTo("test");
+			assertThat(locations.get("/**").get(0)).isEqualTo(new ClassPathResource("/foo/"));
 		});
 	}
 
@@ -1024,7 +1027,7 @@ class WebMvcAutoConfigurationTests {
 	protected Map<String, List<Resource>> getResourceMappingLocations(ApplicationContext context) {
 		Object bean = context.getBean("resourceHandlerMapping");
 		if (bean instanceof HandlerMapping) {
-			return getMappingLocations((HandlerMapping) bean);
+			return getMappingLocations(context, (HandlerMapping) bean);
 		}
 		assertThat(bean.toString()).isEqualTo("null");
 		return Collections.emptyMap();
@@ -1043,11 +1046,18 @@ class WebMvcAutoConfigurationTests {
 	}
 
 	@SuppressWarnings("unchecked")
-	protected Map<String, List<Resource>> getMappingLocations(HandlerMapping mapping) {
+	private Map<String, List<Resource>> getMappingLocations(ApplicationContext context, HandlerMapping mapping) {
 		Map<String, List<Resource>> mappingLocations = new LinkedHashMap<>();
 		getHandlerMap(mapping).forEach((key, value) -> {
-			Object locations = ReflectionTestUtils.getField(value, "locationsToUse");
-			mappingLocations.put(key, (List<Resource>) locations);
+			List<String> locationValues = (List<String>) ReflectionTestUtils.getField(value, "locationValues");
+			List<Resource> locationResources = (List<Resource>) ReflectionTestUtils.getField(value,
+					"locationResources");
+			List<Resource> resources = new ArrayList<>();
+			for (String locationValue : locationValues) {
+				resources.add(context.getResource(locationValue));
+			}
+			resources.addAll(locationResources);
+			mappingLocations.put(key, resources);
 		});
 		return mappingLocations;
 	}
@@ -1078,11 +1088,11 @@ class WebMvcAutoConfigurationTests {
 	}
 
 	@Configuration(proxyBeanMethods = false)
-	static class WebJarsResources implements WebMvcConfigurer {
+	static class WebJars implements WebMvcConfigurer {
 
 		@Override
 		public void addResourceHandlers(ResourceHandlerRegistry registry) {
-			registry.addResourceHandler("/webjars/**").addResourceLocations(new ClassPathResource("/test", getClass()));
+			registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/foo/");
 		}
 
 	}
@@ -1092,7 +1102,7 @@ class WebMvcAutoConfigurationTests {
 
 		@Override
 		public void addResourceHandlers(ResourceHandlerRegistry registry) {
-			registry.addResourceHandler("/**").addResourceLocations(new ClassPathResource("/test", getClass()));
+			registry.addResourceHandler("/**").addResourceLocations("classpath:/foo/");
 		}
 
 	}
diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConstructorBinding.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConstructorBinding.java
index cbd19bbe4a9..bbde4c7121c 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConstructorBinding.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConstructorBinding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2021 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.