diff --git a/plugins/techdocs-module-addons-contrib/src/ExpandableNavigation/ExpandableNavigation.test.tsx b/plugins/techdocs-module-addons-contrib/src/ExpandableNavigation/ExpandableNavigation.test.tsx
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+++ b/plugins/techdocs-module-addons-contrib/src/ExpandableNavigation/ExpandableNavigation.test.tsx
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2022 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { TechDocsAddonTester } from '@backstage/plugin-techdocs-addons-test-utils';
+
+import React from 'react';
+import { fireEvent, waitFor } from '@testing-library/react';
+
+import { ExpandableNavigation } from '..';
+
+const mockNavWithSublevels = (
+  <div data-md-component="navigation">
+    <nav>
+      <ul>
+        <li className="md-nav__item md-nav__item--nested">
+          <input
+            id="nav-2"
+            type="checkbox"
+            data-md-toggle="nav-2"
+            className="md-nav__toggle md-toggle"
+          />
+          <ul data-md-scrollfix="" className="md-nav__list">
+            <li className="md-nav__item">
+              <a className="md-nav__link" title="First Level Nested" href="/">
+                First Level Nested
+              </a>
+            </li>
+            <li className="md-nav__item md-nav__item--nested">
+              <input
+                id="nav-2-2"
+                type="checkbox"
+                data-md-toggle="nav-2-2"
+                className="md-nav__toggle md-toggle"
+              />
+              <ul data-md-scrollfix="" className="md-nav__list">
+                <li className="md-nav__item">
+                  <a
+                    className="md-nav__link"
+                    title="Second Level Nested"
+                    href="/"
+                  >
+                    Second Level Nested
+                  </a>
+                </li>
+              </ul>
+            </li>
+          </ul>
+        </li>
+      </ul>
+    </nav>
+  </div>
+);
+
+const mockNavWithoutSublevels = (
+  <div data-md-component="navigation">
+    <nav>
+      <ul>
+        <li className="md-nav__item">
+          <a className="md-nav__link" title="Nav Item" href="/">
+            Nav Item
+          </a>
+        </li>
+        <li className="md-nav__item">
+          <a className="md-nav__link" title="Second Nav Item" href="/">
+            Second Nav Item
+          </a>
+        </li>
+      </ul>
+    </nav>
+  </div>
+);
+
+describe('ExpandableNavigation', () => {
+  it('renders without exploding', async () => {
+    const { getByRole } = await TechDocsAddonTester.buildAddonsInTechDocs([
+      <ExpandableNavigation />,
+    ])
+      .withDom(mockNavWithSublevels)
+      .renderWithEffects();
+
+    expect(getByRole('button', { name: 'expand-nav' })).toBeInTheDocument();
+  });
+
+  it('expands and collapses navigation', async () => {
+    const { getByRole, shadowRoot } =
+      await TechDocsAddonTester.buildAddonsInTechDocs([
+        <ExpandableNavigation />,
+      ])
+        .withDom(mockNavWithSublevels)
+        .renderWithEffects();
+
+    const toggles =
+      shadowRoot!.querySelectorAll<HTMLInputElement>('.md-toggle');
+
+    expect(toggles).toHaveLength(2);
+    toggles.forEach(item => {
+      expect(item).not.toBeChecked();
+    });
+
+    const expandButton = getByRole('button', { name: 'expand-nav' });
+
+    fireEvent.click(expandButton);
+
+    await waitFor(() => {
+      expect(getByRole('button', { name: 'collapse-nav' })).toBeInTheDocument();
+      toggles.forEach(item => {
+        expect(item).toBeChecked();
+      });
+    });
+
+    const collapseButton = getByRole('button', { name: 'collapse-nav' });
+
+    fireEvent.click(collapseButton);
+
+    await waitFor(() => {
+      toggles.forEach(item => {
+        expect(item).not.toBeChecked();
+      });
+    });
+  });
+
+  it('does not render when navigation has no sublevels', async () => {
+    const { queryByRole } = await TechDocsAddonTester.buildAddonsInTechDocs([
+      <ExpandableNavigation />,
+    ])
+      .withDom(mockNavWithoutSublevels)
+      .renderWithEffects();
+
+    expect(
+      queryByRole('button', { name: 'expand-nav' }),
+    ).not.toBeInTheDocument();
+  });
+});