diff --git a/californium-core/src/test/java/org/eclipse/californium/core/coap/TestResource.java b/californium-core/src/test/java/org/eclipse/californium/core/coap/TestResource.java
new file mode 100644
index 0000000000..f167d77a16
--- /dev/null
+++ b/californium-core/src/test/java/org/eclipse/californium/core/coap/TestResource.java
@@ -0,0 +1,63 @@
+/********************************************************************************
+ * Copyright (c) 2024 Contributors to the Eclipse Foundation
+ * 
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ * 
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0 which is available at
+ * https://www.eclipse.org/legal/epl-2.0, or the Eclipse Distribution License
+ * v1.0 which is available at
+ * https://www.eclipse.org/org/documents/edl-v10.php.
+ * 
+ * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
+ ********************************************************************************/
+package org.eclipse.californium.core.coap;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.eclipse.californium.core.CoapResource;
+import org.eclipse.californium.core.network.Exchange;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Test resource to handles junit asserts of the scopes of other thread.
+ * 
+ * Intended to use assert with {@link #handleRequest(Exchange)} execution.
+ * 
+ * @since 3.11
+ */
+public class TestResource extends CoapResource {
+
+	private static final Logger LOGGER = LoggerFactory.getLogger(TestResource.class);
+
+	private List<Error> errors = new ArrayList<>();
+
+	public TestResource(String name) {
+		super(name);
+	}
+
+	@Override
+	public void handleRequest(final Exchange exchange) {
+		try {
+			super.handleRequest(exchange);
+		} catch (Error e) {
+			LOGGER.warn("{}", e.getMessage(), e);
+			errors.add(e);
+		}
+	}
+
+	/**
+	 * Report errors catched during execution of
+	 * {@link #handleRequest(Exchange)}.
+	 * 
+	 * @throw Errors if occurred execution {@link #handleRequest(Exchange)}
+	 */
+	public void report() {
+		if (!errors.isEmpty()) {
+			throw errors.get(0);
+		}
+	}
+}
diff --git a/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseBertTransferTest.java b/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseBertTransferTest.java
index 59d1daea37..86490ee939 100644
--- a/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseBertTransferTest.java
+++ b/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseBertTransferTest.java
@@ -32,6 +32,7 @@
 import org.eclipse.californium.core.coap.BlockOption;
 import org.eclipse.californium.core.coap.Request;
 import org.eclipse.californium.core.coap.Response;
+import org.eclipse.californium.core.coap.TestResource;
 import org.eclipse.californium.core.config.CoapConfig;
 import org.eclipse.californium.core.network.CoapEndpoint;
 import org.eclipse.californium.core.network.Endpoint;
@@ -268,8 +269,7 @@ public String getProtocol() {
 		serverEndpoint = builder.build();
 		serverEndpoint.addInterceptor(interceptor);
 		result.addEndpoint(serverEndpoint);
-
-		result.add(new CoapResource(RESOURCE_TEST) {
+		TestResource testResource = new TestResource(RESOURCE_TEST) {
 
 			@Override
 			public void handleGET(final CoapExchange exchange) {
@@ -285,7 +285,9 @@ public void handlePOST(final CoapExchange exchange) {
 				assertEquals(payload, LONG_POST_REQUEST);
 				exchange.respond(LONG_POST_RESPONSE);
 			}
-		});
+		};
+		cleanup.add(testResource);
+		result.add(testResource);
 		result.add(new CoapResource(RESOURCE_BIG) {
 
 			@Override
diff --git a/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseTransferTest.java b/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseTransferTest.java
index bf60d2b5da..bcbce37117 100644
--- a/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseTransferTest.java
+++ b/californium-core/src/test/java/org/eclipse/californium/core/test/BlockwiseTransferTest.java
@@ -42,6 +42,7 @@
 import org.eclipse.californium.core.config.CoapConfig;
 import org.eclipse.californium.core.coap.Request;
 import org.eclipse.californium.core.coap.Response;
+import org.eclipse.californium.core.coap.TestResource;
 import org.eclipse.californium.core.network.CoapEndpoint;
 import org.eclipse.californium.core.network.Endpoint;
 import org.eclipse.californium.core.server.resources.CoapExchange;
@@ -398,8 +399,7 @@ private static CoapServer createSimpleServer() {
 		builderStrictBlock2.setConfiguration(configEndpointStrictBlock2Option);
 		serverEndpointStrictBlock2Option = builderStrictBlock2.build();
 		result.addEndpoint(serverEndpointStrictBlock2Option);
-		
-		result.add(new CoapResource(RESOURCE_TEST) {
+		TestResource testResoure = new TestResource(RESOURCE_TEST) {
 
 			private boolean isShortRequest(final CoapExchange exchange) {
 				return exchange.getQueryParameter(PARAM_SHORT_REQ) != null;
@@ -445,7 +445,9 @@ public void handlePOST(final CoapExchange exchange) {
 					exchange.respond(LONG_POST_RESPONSE);
 				}
 			}
-		});
+		};
+		cleanup.add(testResoure);
+		result.add(testResoure);
 		result.add(new CoapResource(RESOURCE_BIG) {
 
 			@Override
diff --git a/californium-core/src/test/java/org/eclipse/californium/core/test/lockstep/BlockwiseServerSideTest.java b/californium-core/src/test/java/org/eclipse/californium/core/test/lockstep/BlockwiseServerSideTest.java
index f3e14e882a..5fd35f6958 100644
--- a/californium-core/src/test/java/org/eclipse/californium/core/test/lockstep/BlockwiseServerSideTest.java
+++ b/californium-core/src/test/java/org/eclipse/californium/core/test/lockstep/BlockwiseServerSideTest.java
@@ -60,11 +60,11 @@
 import java.util.concurrent.atomic.AtomicInteger;
 
 import org.eclipse.californium.TestTools;
-import org.eclipse.californium.core.CoapResource;
 import org.eclipse.californium.core.CoapServer;
 import org.eclipse.californium.core.coap.CoAP.ResponseCode;
 import org.eclipse.californium.core.coap.Request;
 import org.eclipse.californium.core.coap.Response;
+import org.eclipse.californium.core.coap.TestResource;
 import org.eclipse.californium.core.config.CoapConfig;
 import org.eclipse.californium.core.network.UdpMatcher;
 import org.eclipse.californium.core.network.interceptors.MessageInterceptorAdapter;
@@ -158,6 +158,7 @@ public void setup() throws Exception {
 		expectedToken = null;
 		testResource = new MyTestResource(RESOURCE_PATH);
 		testResource.setObservable(true);
+		cleanup.add(testResource);
 		setupServerAndClient();
 	}
 
@@ -1163,7 +1164,7 @@ public void testObserveWithBlockwiseResponseEarlyNegotiation() throws Exception
 	}
 
 	// All tests are made with this resource
-	private class MyTestResource extends CoapResource {
+	private class MyTestResource extends TestResource {
 
 		public AtomicInteger calls = new AtomicInteger();
 
diff --git a/californium-core/src/test/java/org/eclipse/californium/rule/CoapThreadsRule.java b/californium-core/src/test/java/org/eclipse/californium/rule/CoapThreadsRule.java
index 413a72a92e..393cc1a21f 100644
--- a/californium-core/src/test/java/org/eclipse/californium/rule/CoapThreadsRule.java
+++ b/californium-core/src/test/java/org/eclipse/californium/rule/CoapThreadsRule.java
@@ -21,6 +21,7 @@
 
 import org.eclipse.californium.core.CoapClient;
 import org.eclipse.californium.core.CoapServer;
+import org.eclipse.californium.core.coap.TestResource;
 import org.eclipse.californium.core.network.Endpoint;
 import org.eclipse.californium.core.network.EndpointManager;
 import org.eclipse.californium.core.test.lockstep.LockstepEndpoint;
@@ -76,6 +77,10 @@ public void add(LockstepEndpoint endpoint) {
 		cleanup.add(endpoint);
 	}
 
+	public void add(TestResource resource) {
+		cleanup.add(resource);
+	}
+
 	@Override
 	protected void shutdown() {
 		for (Object resource : cleanup) {
@@ -93,6 +98,8 @@ protected void shutdown() {
 					((LockstepEndpoint) resource).destroy();
 				} else if (resource instanceof Connector) {
 					((Connector) resource).destroy();
+				} else if (resource instanceof TestResource) {
+					((TestResource) resource).report();
 				}
 			} catch (RuntimeException ex) {
 				LOGGER.warn("shutdown failed!", ex);