diff --git a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscoverer.java b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscoverer.java
index b63a3bbf9e7..118cf73e209 100644
--- a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscoverer.java
+++ b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscoverer.java
@@ -338,7 +338,8 @@ public abstract class EndpointDiscoverer<E extends ExposableEndpoint<O>, O exten
 		return isFilterMatch(filter, getFilterEndpoint(endpointBean));
 	}
 
-	@SuppressWarnings({ "unchecked" })
+	// Doesn't detect lambda with correct nullability
+	@SuppressWarnings({ "unchecked", "NullAway" })
 	private boolean isFilterMatch(EndpointFilter<E> filter, E endpoint) {
 		Boolean result = LambdaSafe.callback(EndpointFilter.class, filter, endpoint)
 			.withLogger(EndpointDiscoverer.class)
@@ -357,7 +358,8 @@ public abstract class EndpointDiscoverer<E extends ExposableEndpoint<O>, O exten
 		return false;
 	}
 
-	@SuppressWarnings("unchecked")
+	// Doesn't detect lambda with correct nullability
+	@SuppressWarnings({ "unchecked", "NullAway" })
 	private boolean isFilterMatch(OperationFilter<O> filter, Operation operation, EndpointId endpointId,
 			Access defaultAccess) {
 		Boolean result = LambdaSafe.callback(OperationFilter.class, filter, operation)
diff --git a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointWebExtension.java b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointWebExtension.java
index af3d36db46a..010a5599874 100644
--- a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointWebExtension.java
+++ b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/HealthEndpointWebExtension.java
@@ -80,8 +80,9 @@ public class HealthEndpointWebExtension extends HealthEndpointSupport<Health, He
 		return health(apiVersion, serverNamespace, securityContext, false, path);
 	}
 
-	public WebEndpointResponse<HealthDescriptor> health(ApiVersion apiVersion, WebServerNamespace serverNamespace,
-			SecurityContext securityContext, boolean showAll, String... path) {
+	public WebEndpointResponse<HealthDescriptor> health(ApiVersion apiVersion,
+			@Nullable WebServerNamespace serverNamespace, SecurityContext securityContext, boolean showAll,
+			String... path) {
 		Result<HealthDescriptor> result = getResult(apiVersion, serverNamespace, securityContext, showAll, path);
 		if (result == null) {
 			return (Arrays.equals(path, EMPTY_PATH))
diff --git a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtension.java b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtension.java
index 9ba3d44082a..fd4ff9317de 100644
--- a/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtension.java
+++ b/module/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/ReactiveHealthEndpointWebExtension.java
@@ -81,7 +81,8 @@ public class ReactiveHealthEndpointWebExtension
 	}
 
 	public Mono<WebEndpointResponse<? extends HealthDescriptor>> health(ApiVersion apiVersion,
-			WebServerNamespace serverNamespace, SecurityContext securityContext, boolean showAll, String... path) {
+			@Nullable WebServerNamespace serverNamespace, SecurityContext securityContext, boolean showAll,
+			String... path) {
 		Result<Mono<? extends HealthDescriptor>> result = getResult(apiVersion, serverNamespace, securityContext,
 				showAll, path);
 		if (result == null) {