Исправлена ошибка с именем пакета в тестах

test/InMemoryTaskManagerTest.java

@@ -0,0 +1,22 @@
+import tasktracker.manager.InMemoryTaskManager;
+import tasktracker.manager.TaskManager;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+public class InMemoryTaskManagerTest {
+
+    private TaskManager taskManager;
+
+    @BeforeEach
+    public void setUp() {
+        taskManager = new InMemoryTaskManager();
+    }
+
+    @Test
+    public void testInitialization() {
+        assertNotNull(taskManager);
+    }
+}