diff --git a/test/mocha/validator.spec.js b/test/mocha/validator.spec.js
index 7a5188a8..295ada10 100644
--- a/test/mocha/validator.spec.js
+++ b/test/mocha/validator.spec.js
@@ -7,49 +7,49 @@ describe('validator', () => {
       const domain = 'https://mastodon.social'
       it('should not match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, -1)
+        assert.strictEqual(res, -1)
       })
     })
     context('string contains account name', () => {
       const domain = 'h3_poteto@mastodon.social'
       it('should not match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, -1)
+        assert.strictEqual(res, -1)
       })
     })
     context('string is gTLD domain', () => {
       const domain = 'mastodon.social'
       it('should match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, 0)
+        assert.strictEqual(res, 0)
       })
     })
     context('string is subdomain', () => {
       const domain = 'music.mastodon.social'
       it('should match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, 0)
+        assert.strictEqual(res, 0)
       })
     })
     context('string is subdomain', () => {
       const domain = 'social.tchncs.de'
       it('should match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, 0)
+        assert.strictEqual(res, 0)
       })
     })
     context('string is jp domain', () => {
       const domain = 'mstdn.co.jp'
       it('should match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, 0)
+        assert.strictEqual(res, 0)
       })
     })
     context('string contains hyphone', () => {
       const domain = 'music-mastodon.social'
       it('should match', () => {
         const res = domain.search(domainFormat)
-        assert.equal(res, 0)
+        assert.strictEqual(res, 0)
       })
     })
   })