diff --git a/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.d.ts b/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.d.ts
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.js b/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.jsx b/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.jsx
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.ts b/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.ts
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.tsx b/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/SiblingNavbarItem.test.tsx
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/__tests__/index.js b/packages/docusaurus/src/webpack/aliases/__tests__/__fixtures__/theme-2/NavbarItem/__tests__/index.js
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/packages/docusaurus/src/webpack/aliases/index.ts b/packages/docusaurus/src/webpack/aliases/index.ts
index dbade3a77e..03e14426b0 100644
--- a/packages/docusaurus/src/webpack/aliases/index.ts
+++ b/packages/docusaurus/src/webpack/aliases/index.ts
@@ -53,6 +53,13 @@ export async function createAliasesForTheme(
 
   const themeComponentFiles = await Globby(['**/*.{js,jsx,ts,tsx}'], {
     cwd: themePath,
+    ignore: [
+      // Ignore co-located test files
+      '**/__tests__/**',
+      '**/*.test.{js,jsx,ts,tsx}',
+      // Ignore type declaration files
+      '**/*.d.ts',
+    ],
   });
 
   const aliases: ThemeAliases = {};