diff --git a/QA.md b/QA.md
index bd74e8e..bc1bf67 100644
--- a/QA.md
+++ b/QA.md
@@ -20,10 +20,8 @@ The behaviors of the console are tested in [Console section](#consoles).
 
 ### Properties
 
-- [ ] Configure custom hint character by `:set hintchars=012345678`
-- [ ] Smooth scroll by `:set smoothscroll`
-- [ ] Non-smooth scroll by `:set nosmoothscroll`
-- [ ] Configure smooth scroll by settings `"smoothscroll": true`, `"smoothscroll": false`
+- [ ] Toggle smooth scroll by `:set smoothscroll` and `:set nosmoothscroll`
+- [ ] Configure smooth scroll by settings `"smoothscroll": true` and `"smoothscroll": false`
 
 ### Settings
 
diff --git a/e2e/follow_properties.test.js b/e2e/follow_properties.test.js
index 5e82b50..b38216e 100644
--- a/e2e/follow_properties.test.js
+++ b/e2e/follow_properties.test.js
@@ -3,6 +3,7 @@ const lanthan = require('lanthan');
 const path = require('path');
 const assert = require('assert');
 const eventually = require('./eventually');
+const Console = require('./lib/Console');
 
 const Key = lanthan.Key;
 
@@ -114,7 +115,38 @@ describe('follow properties test', () => {
       assert.equal(await hints[2].getStyle('display'), 'block');
       assert.equal(await hints[3].getStyle('display'), 'block');
       assert.equal(await hints[4].getStyle('display'), 'none');
+    });
+  });
+
+  it('should show hints with hintchars by settings', async () => {
+    let c = new Console(session);
+
+    await body.sendKeys(':');
+    await session.switchToFrame(0);
+    await c.sendKeys('set hintchars=abc', Key.Enter);
+    await session.switchToParentFrame();
+
+    await body.sendKeys('f');
+    await eventually(async() => {
+      let hints = await session.findElementsByCSS('.vimvixen-hint');
+      assert.equal(hints.length, 5);
+
+      assert.equal(await hints[0].getText(), 'A');
+      assert.equal(await hints[1].getText(), 'B');
+      assert.equal(await hints[2].getText(), 'C');
+      assert.equal(await hints[3].getText(), 'AA');
+      assert.equal(await hints[4].getText(), 'AB');
+    });
 
+    await body.sendKeys('a');
+    await eventually(async() => {
+      let hints = await session.findElementsByCSS('.vimvixen-hint');
+
+      assert.equal(await hints[0].getStyle('display'), 'block');
+      assert.equal(await hints[1].getStyle('display'), 'none');
+      assert.equal(await hints[2].getStyle('display'), 'none');
+      assert.equal(await hints[3].getStyle('display'), 'block');
+      assert.equal(await hints[4].getStyle('display'), 'block');
     });
   });