diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebAnnotationEndpointDiscovererTests.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebAnnotationEndpointDiscovererTests.java
index 73f5930b58..2f3881b6fc 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebAnnotationEndpointDiscovererTests.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/CloudFoundryWebAnnotationEndpointDiscovererTests.java
@@ -49,7 +49,7 @@ public class CloudFoundryWebAnnotationEndpointDiscovererTests {
 
 	@Test
 	public void discovererShouldAddSuppliedExtensionForHealthEndpoint() throws Exception {
-		load(TestConfiguration.class, endpointDiscoverer -> {
+		load(TestConfiguration.class, (endpointDiscoverer) -> {
 			Collection<EndpointInfo<WebOperation>> endpoints = endpointDiscoverer
 					.discoverEndpoints();
 			assertThat(endpoints.size()).isEqualTo(2);
diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundryActuatorAutoConfigurationTests.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundryActuatorAutoConfigurationTests.java
index 4fa66dde4f..62124e8db2 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundryActuatorAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/reactive/ReactiveCloudFoundryActuatorAutoConfigurationTests.java
@@ -235,9 +235,8 @@ public class ReactiveCloudFoundryActuatorAutoConfigurationTests {
 		this.context.refresh();
 		Collection<EndpointInfo<WebOperation>> endpoints = getHandlerMapping()
 				.getEndpoints();
-		EndpointInfo endpointInfo = (EndpointInfo) (endpoints.toArray()[0]);
-		WebOperation webOperation = (WebOperation) endpointInfo.getOperations()
-				.toArray()[0];
+		EndpointInfo<WebOperation> endpointInfo = endpoints.iterator().next();
+		WebOperation webOperation = endpointInfo.getOperations().iterator().next();
 		ReflectiveOperationInvoker invoker = (ReflectiveOperationInvoker) webOperation
 				.getInvoker();
 		assertThat(ReflectionTestUtils.getField(invoker, "target"))
diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryActuatorAutoConfigurationTests.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryActuatorAutoConfigurationTests.java
index e4c8dc9da0..454bc65ead 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryActuatorAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/cloudfoundry/servlet/CloudFoundryActuatorAutoConfigurationTests.java
@@ -259,9 +259,8 @@ public class CloudFoundryActuatorAutoConfigurationTests {
 				.getBean("cloudFoundryWebEndpointServletHandlerMapping",
 						CloudFoundryWebEndpointServletHandlerMapping.class)
 				.getEndpoints();
-		EndpointInfo endpointInfo = (EndpointInfo) (endpoints.toArray()[0]);
-		WebOperation webOperation = (WebOperation) endpointInfo.getOperations()
-				.toArray()[0];
+		EndpointInfo<WebOperation> endpointInfo = endpoints.iterator().next();
+		WebOperation webOperation = endpointInfo.getOperations().iterator().next();
 		ReflectiveOperationInvoker invoker = (ReflectiveOperationInvoker) webOperation
 				.getInvoker();
 		assertThat(ReflectionTestUtils.getField(invoker, "target"))
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationReactiveIntegrationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationReactiveIntegrationTests.java
index 74f41de496..b027ce53a2 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationReactiveIntegrationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/freemarker/FreeMarkerAutoConfigurationReactiveIntegrationTests.java
@@ -130,7 +130,7 @@ public class FreeMarkerAutoConfigurationReactiveIntegrationTests {
 		Mono<View> view = resolver.resolveViewName(viewName, Locale.UK);
 		MockServerWebExchange exchange = MockServerWebExchange
 				.from(MockServerHttpRequest.get("/path"));
-		view.flatMap(v -> v.render(null, MediaType.TEXT_HTML, exchange)).block();
+		view.flatMap((v) -> v.render(null, MediaType.TEXT_HTML, exchange)).block();
 		return exchange;
 	}