diff --git a/src/Explorer/Tabs/Tabs.tsx b/src/Explorer/Tabs/Tabs.tsx
index 6c97c7cbf..186a5b5bd 100644
--- a/src/Explorer/Tabs/Tabs.tsx
+++ b/src/Explorer/Tabs/Tabs.tsx
@@ -91,6 +91,7 @@ function TabNav({ tab, active, tabKind }: { tab?: Tab; active: boolean; tabKind?
     <Menu openOnContext>
       <MenuTrigger disableButtonEnhancement>
         <li
+          data-test={`TabNav:${tab !== undefined ? tab.tabId : ReactTabKind[tabKind!]}`}
           onMouseOver={() => setHovering(true)}
           onMouseLeave={() => setHovering(false)}
           className={active ? "active tabList" : "tabList"}
diff --git a/test/fx.ts b/test/fx.ts
index d65d776b1..7c8dcbd3f 100644
--- a/test/fx.ts
+++ b/test/fx.ts
@@ -616,6 +616,16 @@ export class DataExplorer {
     await page.goto(url);
     return DataExplorer.waitForExplorer(page);
   }
+
+  /** Returns the tab navigation <li> element for the given tab ID or React tab name (e.g. "tab0", "Home") */
+  tabNavHeader(tabId: string): Locator {
+    return this.frame.getByTestId(`TabNav:${tabId}`);
+  }
+
+  /** Returns a context menu item in the tab right-click menu by visible label */
+  tabContextMenuItem(label: string): Locator {
+    return this.frame.getByRole("menuitem", { name: label });
+  }
 }
 
 export async function waitForApiResponse(
diff --git a/test/sql/duplicateTab.spec.ts b/test/sql/duplicateTab.spec.ts
new file mode 100644
index 000000000..d1de09f80
--- /dev/null
+++ b/test/sql/duplicateTab.spec.ts
@@ -0,0 +1,126 @@
+import { expect, test } from "@playwright/test";
+
+import { DataExplorer, TestAccount } from "../fx";
+import { createTestSQLContainer, TestContainerContext } from "../testData";
+
+let context: TestContainerContext = null!;
+let explorer: DataExplorer = null!;
+
+test.beforeAll("Create Test Database", async () => {
+  context = await createTestSQLContainer({ includeTestData: false });
+});
+
+test.afterAll("Delete Test Database", async () => {
+  await context?.dispose();
+});
+
+test.beforeEach("Open Data Explorer", async ({ page }) => {
+  explorer = await DataExplorer.open(page, TestAccount.SQL);
+});
+
+test("Duplicate Items tab opens a second Items tab", async () => {
+  // Open Items tab
+  const containerNode = await explorer.waitForContainerNode(context.database.id, context.container.id);
+  await containerNode.expand();
+  const itemsNode = await explorer.waitForContainerItemsNode(context.database.id, context.container.id);
+  await itemsNode.element.click();
+
+  const documentsTab = explorer.documentsTab("tab0");
+  await documentsTab.documentsFilter.waitFor({ timeout: 30_000 });
+
+  // Right-click the tab nav header
+  await explorer.tabNavHeader("tab0").click({ button: "right" });
+
+  // "Duplicate tab" should be visible in the context menu
+  const duplicateMenuItem = explorer.tabContextMenuItem("Duplicate tab");
+  await expect(duplicateMenuItem).toBeVisible();
+  await duplicateMenuItem.click();
+
+  // A second tab should appear
+  const tab1 = explorer.tab("tab1");
+  await expect(tab1).toBeAttached({ timeout: 30_000 });
+
+  // The duplicated tab should also show the Documents content
+  const duplicatedTab = explorer.documentsTab("tab1");
+  await duplicatedTab.documentsFilter.waitFor({ timeout: 30_000 });
+});
+
+test("Duplicate Query tab preserves query text in new tab", async () => {
+  // Open a new SQL query tab via container context menu
+  const containerNode = await explorer.waitForContainerNode(context.database.id, context.container.id);
+  await containerNode.openContextMenu();
+  await containerNode.contextMenuItem("New SQL Query").click();
+
+  const queryTab = explorer.queryTab("tab0");
+  const editor = queryTab.editor();
+  await editor.locator.waitFor({ timeout: 30_000 });
+
+  // Type a custom query
+  const customQuery = 'SELECT * FROM c WHERE c.id = "duplicate-query-test"';
+  await editor.setText(customQuery);
+
+  // Right-click the tab nav header
+  await explorer.tabNavHeader("tab0").click({ button: "right" });
+
+  const duplicateMenuItem = explorer.tabContextMenuItem("Duplicate tab");
+  await expect(duplicateMenuItem).toBeVisible();
+  await duplicateMenuItem.click();
+
+  // Second query tab should appear
+  const tab1 = explorer.tab("tab1");
+  await expect(tab1).toBeAttached({ timeout: 30_000 });
+
+  // The duplicated tab should contain the same query text
+  const duplicatedQueryTab = explorer.queryTab("tab1");
+  await duplicatedQueryTab.editor().locator.waitFor({ timeout: 30_000 });
+  const editorText = await duplicatedQueryTab.editor().text();
+  expect(editorText).toContain("duplicate-query-test");
+});
+
+test("Duplicate Scale & Settings tab opens a second settings tab", async () => {
+  await explorer.openScaleAndSettings(context);
+
+  // Wait for the settings tab pane to be attached
+  const tab0 = explorer.tab("tab0");
+  await expect(tab0).toBeAttached({ timeout: 30_000 });
+
+  // Right-click the tab nav header
+  await explorer.tabNavHeader("tab0").click({ button: "right" });
+
+  const duplicateMenuItem = explorer.tabContextMenuItem("Duplicate tab");
+  await expect(duplicateMenuItem).toBeVisible();
+  await duplicateMenuItem.click();
+
+  // A second settings tab should appear
+  const tab1 = explorer.tab("tab1");
+  await expect(tab1).toBeAttached({ timeout: 30_000 });
+});
+
+test("Duplicate tab menu item is not shown for the Home tab", async () => {
+  // The Home tab (ReactTabKind) is never duplicable
+  await explorer.tabNavHeader("Home").click({ button: "right" });
+
+  // "Close tab" should always appear
+  await expect(explorer.tabContextMenuItem("Close tab")).toBeVisible();
+
+  // "Duplicate tab" must NOT appear
+  await expect(explorer.tabContextMenuItem("Duplicate tab")).not.toBeVisible();
+});
+
+test("Close tab from right-click menu closes the tab", async () => {
+  // Open Items tab
+  const containerNode = await explorer.waitForContainerNode(context.database.id, context.container.id);
+  await containerNode.expand();
+  const itemsNode = await explorer.waitForContainerItemsNode(context.database.id, context.container.id);
+  await itemsNode.element.click();
+
+  const documentsTab = explorer.documentsTab("tab0");
+  await documentsTab.documentsFilter.waitFor({ timeout: 30_000 });
+
+  // Right-click the tab nav header and close the tab
+  await explorer.tabNavHeader("tab0").click({ button: "right" });
+  await explorer.tabContextMenuItem("Close tab").click();
+
+  // The tab pane should be removed
+  await expect(explorer.tab("tab0")).not.toBeAttached({ timeout: 15_000 });
+});