diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/session/SessionsEndpoint.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/session/SessionsEndpoint.java
index db60d0459e..a08e796479 100644
--- a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/session/SessionsEndpoint.java
+++ b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/session/SessionsEndpoint.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -16,10 +16,8 @@
 
 package org.springframework.boot.actuate.session;
 
-import java.time.Instant;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 
 import org.springframework.boot.actuate.endpoint.OperationResponseBody;
 import org.springframework.boot.actuate.endpoint.annotation.DeleteOperation;
@@ -97,56 +95,4 @@ public class SessionsEndpoint {
 
 	}
 
-	/**
-	 * Description of user's {@link Session session}.
-	 */
-	public static final class SessionDescriptor implements OperationResponseBody {
-
-		private final String id;
-
-		private final Set<String> attributeNames;
-
-		private final Instant creationTime;
-
-		private final Instant lastAccessedTime;
-
-		private final long maxInactiveInterval;
-
-		private final boolean expired;
-
-		public SessionDescriptor(Session session) {
-			this.id = session.getId();
-			this.attributeNames = session.getAttributeNames();
-			this.creationTime = session.getCreationTime();
-			this.lastAccessedTime = session.getLastAccessedTime();
-			this.maxInactiveInterval = session.getMaxInactiveInterval().getSeconds();
-			this.expired = session.isExpired();
-		}
-
-		public String getId() {
-			return this.id;
-		}
-
-		public Set<String> getAttributeNames() {
-			return this.attributeNames;
-		}
-
-		public Instant getCreationTime() {
-			return this.creationTime;
-		}
-
-		public Instant getLastAccessedTime() {
-			return this.lastAccessedTime;
-		}
-
-		public long getMaxInactiveInterval() {
-			return this.maxInactiveInterval;
-		}
-
-		public boolean isExpired() {
-			return this.expired;
-		}
-
-	}
-
 }
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/ReactiveSessionsEndpointTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/ReactiveSessionsEndpointTests.java
index 39895c4423..48ca95536f 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/ReactiveSessionsEndpointTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/ReactiveSessionsEndpointTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2022 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -16,6 +16,8 @@
 
 package org.springframework.boot.actuate.session;
 
+import java.time.Duration;
+
 import org.junit.jupiter.api.Test;
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
@@ -53,21 +55,23 @@ class ReactiveSessionsEndpointTests {
 			assertThat(result.getLastAccessedTime()).isEqualTo(session.getLastAccessedTime());
 			assertThat(result.getMaxInactiveInterval()).isEqualTo(session.getMaxInactiveInterval().getSeconds());
 			assertThat(result.isExpired()).isEqualTo(session.isExpired());
-		}).verifyComplete();
+		}).expectComplete().verify(Duration.ofSeconds(1));
 		then(this.sessionRepository).should().findById(session.getId());
 	}
 
 	@Test
 	void getSessionWithIdNotFound() {
 		given(this.sessionRepository.findById("not-found")).willReturn(Mono.empty());
-		StepVerifier.create(this.endpoint.getSession("not-found")).verifyComplete();
+		StepVerifier.create(this.endpoint.getSession("not-found")).expectComplete().verify(Duration.ofSeconds(1));
 		then(this.sessionRepository).should().findById("not-found");
 	}
 
 	@Test
 	void deleteSession() {
 		given(this.sessionRepository.deleteById(session.getId())).willReturn(Mono.empty());
-		StepVerifier.create(this.endpoint.deleteSession(session.getId())).verifyComplete();
+		StepVerifier.create(this.endpoint.deleteSession(session.getId()))
+			.expectComplete()
+			.verify(Duration.ofSeconds(1));
 		then(this.sessionRepository).should().deleteById(session.getId());
 	}
 
diff --git a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/SessionsEndpointTests.java b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/SessionsEndpointTests.java
index 62e728216b..e37279c51f 100644
--- a/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/SessionsEndpointTests.java
+++ b/spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/session/SessionsEndpointTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 the original author or authors.
+ * Copyright 2012-2024 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.
@@ -54,7 +54,7 @@ class SessionsEndpointTests {
 	void sessionsForUsername() {
 		given(this.indexedSessionRepository.findByPrincipalName("user"))
 			.willReturn(Collections.singletonMap(session.getId(), session));
-		List<SessionsEndpoint.SessionDescriptor> result = this.endpoint.sessionsForUsername("user").getSessions();
+		List<SessionDescriptor> result = this.endpoint.sessionsForUsername("user").getSessions();
 		assertThat(result).hasSize(1);
 		assertThat(result.get(0).getId()).isEqualTo(session.getId());
 		assertThat(result.get(0).getAttributeNames()).isEqualTo(session.getAttributeNames());
@@ -74,7 +74,7 @@ class SessionsEndpointTests {
 	@Test
 	void getSession() {
 		given(this.sessionRepository.findById(session.getId())).willReturn(session);
-		SessionsEndpoint.SessionDescriptor result = this.endpoint.getSession(session.getId());
+		SessionDescriptor result = this.endpoint.getSession(session.getId());
 		assertThat(result.getId()).isEqualTo(session.getId());
 		assertThat(result.getAttributeNames()).isEqualTo(session.getAttributeNames());
 		assertThat(result.getCreationTime()).isEqualTo(session.getCreationTime());