diff --git a/dom/nesting-organs_test.js b/dom/nesting-organs_test.js
new file mode 100644
index 00000000..397b2f52
--- /dev/null
+++ b/dom/nesting-organs_test.js
@@ -0,0 +1,94 @@
+export const tests = []
+
+tests.push(async ({ page, eq }) => {
+  // check that the HTML structure is correct & elements are nested properly
+  const elements = await page.$$eval('body', (nodes) => {
+    const toNode = (el) => {
+      const node = {}
+      node.tag = el.tagName.toLowerCase()
+      node.id = el.id
+      if (el.children.length) {
+        node.children = [...el.children].map(toNode)
+      }
+      return node
+    }
+    return [...nodes[0].children].map(toNode)
+  })
+  eq(expectedStructure, elements)
+
+  // check the section selector style has been updated properly
+  const sectionSelectorStyle = await page.evaluate(() => {
+    const target = [...window.document.styleSheets[0].cssRules].find(
+      (rule) => rule.selectorText === 'section',
+    )
+    const { display, justifyContent } = target.style
+    return { display, justifyContent }
+  })
+  eq({ display: 'flex', justifyContent: 'center' }, sectionSelectorStyle)
+
+  // check if the given CSS has been correctly copy pasted
+
+  // div,
+  // p {
+  //   border: solid 1px black;
+  //   padding: 10px;
+  //   margin: 0;
+  //   border-radius: 30px;
+  // }
+
+  // #face {
+  //   align-items: center;
+  // }
+
+  // #eyes {
+  //   display: flex;
+  //   background-color: yellow;
+  //   justify-content: space-between;
+  //   align-items: center;
+  //   border-radius: 50px;
+  //   width: 200px;
+  // }
+
+  // #torso {
+  //   width: 200px;
+  //   background-color: violet;
+  // }
+})
+
+const expectedStructure = [
+  {
+    tag: 'section',
+
+    id: 'face',
+    children: [
+      {
+        tag: 'div',
+
+        id: 'eyes',
+        children: [
+          { tag: 'p', id: 'eye-left' },
+          { tag: 'p', id: 'eye-right' },
+        ],
+      },
+    ],
+  },
+  {
+    tag: 'section',
+
+    id: 'upper-body',
+    children: [
+      { tag: 'div', id: 'arm-left' },
+      { tag: 'div', id: 'torso' },
+      { tag: 'div', id: 'arm-right' },
+    ],
+  },
+  {
+    tag: 'section',
+
+    id: 'lower-body',
+    children: [
+      { tag: 'div', id: 'leg-left' },
+      { tag: 'div', id: 'leg-right' },
+    ],
+  },
+]