diff --git a/spec/md5_spec.lua b/spec/md5_spec.lua
index d31ed04..ed00a0e 100644
--- a/spec/md5_spec.lua
+++ b/spec/md5_spec.lua
@@ -14,6 +14,7 @@ describe('md5', function()
       assert.equal(md5.sumhexa('The quick brown fox jumps over the lazy dog'), '9e107d9d372bb6826bd81d3542a419d6')
       assert.equal(md5.sumhexa('The quick brown fox jumps over the lazy dog.'), 'e4d909c290d0fb1ca068ffaddf22cbd0')
       assert.equal(md5.sumhexa(''), 'd41d8cd98f00b204e9800998ecf8427e')
+      assert.equal(md5.sumhexa(('1'):rep(824)), 'a126fd3611ab8d9b7e8a3384e2fa78a0')
     end)
   end)
 
@@ -23,6 +24,7 @@ describe('md5', function()
       assert.equal(md5.sum('The quick brown fox jumps over the lazy dog'), hex2bin'9e107d9d372bb6826bd81d3542a419d6')
       assert.equal(md5.sum('The quick brown fox jumps over the lazy dog.'), hex2bin'e4d909c290d0fb1ca068ffaddf22cbd0')
       assert.equal(md5.sum(''), hex2bin'd41d8cd98f00b204e9800998ecf8427e')
+      assert.equal(md5.sum(('1'):rep(824)), hex2bin'a126fd3611ab8d9b7e8a3384e2fa78a0')
     end)
   end)
 end)