Possible fix

sshd-common/src/test/java/org/apache/sshd/util/test/JUnitTestSupport.java

@@ -71,19 +71,11 @@
 import org.slf4j.LoggerFactory;
 import org.slf4j.bridge.SLF4JBridgeHandler;
 
-import static org.junit.jupiter.api.Assertions.assertArrayEquals;
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.junit.jupiter.api.Assertions.fail;
-
 /**
  * TODO Add javadoc
  *
  * @author <a href="mailto:[email protected]">Apache MINA SSHD Project</a>
  */
-
 public abstract class JUnitTestSupport extends Assertions {
     public static final String TEMP_SUBFOLDER_NAME = "temp";
     public static final boolean OUTPUT_DEBUG_MESSAGES

sshd-core/src/test/java/org/apache/sshd/common/global/OpenSshHostKeysHandlerTest.java

@@ -37,11 +37,6 @@
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertFalse;
-import static org.junit.jupiter.api.Assertions.assertThrows;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-
 /**
  * @author <a href="mailto:[email protected]">Apache MINA SSHD Project</a>
  */
@@ -109,6 +104,6 @@ protected Result handleHostKeys(
         SshException e = assertThrows(SshException.class, () -> handler.process(connectionService,
                 org.apache.sshd.server.global.OpenSshHostKeysHandler.REQUEST, false, buffer));
         assertFalse(handlerCalled[0], "Handler should not have been called");
-        assertTrue(e.getCause() instanceof GeneralSecurityException, "Expected exception cause");
+        assertInstanceOf(GeneralSecurityException.class, e.getCause(), "Expected exception cause");
     }
 }

sshd-netty/pom.xml

@@ -68,6 +68,11 @@
             <artifactId>junit-jupiter</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.apache.sshd</groupId>
             <artifactId>sshd-core</artifactId>