diff --git a/src/default_config/loaders.js b/src/default_config/loaders.js
index a6ae943..36a6c07 100644
--- a/src/default_config/loaders.js
+++ b/src/default_config/loaders.js
@@ -1,4 +1,4 @@
-const fileExts = ['jpg', 'png', 'gif', 'eot', 'svg', 'ttf', 'woff', 'woff2'];
+const fileExts = ['jpg', 'png', 'gif', 'eot', 'svg', 'ttf', 'woff', 'woff2', 'md', 'mdown', 'markdown'];
 const moduleExts = ['css', 'scss', 'sass'];
 
 const loaders = {};
diff --git a/src/default_config/tests/loaders.js b/src/default_config/tests/loaders.js
new file mode 100644
index 0000000..7d4e5d2
--- /dev/null
+++ b/src/default_config/tests/loaders.js
@@ -0,0 +1,42 @@
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+
+import loaders from '../loaders';
+
+const returnArg = arg => arg;
+const returnNull = () => null;
+
+const expecteds = {
+  jpg: returnArg,
+  png: returnArg,
+  gif: returnArg,
+  eot: returnArg,
+  svg: returnArg,
+  ttf: returnArg,
+  woff: returnArg,
+  woff2: returnArg,
+  md: returnArg,
+  mdown: returnArg,
+  markdown: returnArg,
+  css: returnNull,
+  scss: returnNull,
+  sass: returnNull,
+};
+
+describe('loaders', () => {
+  const exts = Object.keys(expecteds);
+
+  expect(loaders).to.have.all.keys(exts);
+
+  exts.forEach((ext) => {
+    describe(`.${ext}`, () => {
+      const expected = expecteds[ext]('test');
+
+      it(`should return "${expected}"`, () => {
+        const actual = loaders[ext]('test');
+
+        expect(actual).to.equal(expected);
+      });
+    });
+  });
+});