diff --git a/lib/faker/default/json.rb b/lib/faker/default/json.rb
index 8edf1a9948..6b0dad5c0f 100644
--- a/lib/faker/default/json.rb
+++ b/lib/faker/default/json.rb
@@ -86,7 +86,10 @@ def build_shallow_hash(width, options)
         value = options[:value]
 
         hash = {}
-        width.times do
+        # retry on duplicate
+        (width * 10).times do
+          break if hash.size == width
+
           hash[eval(key)] = eval(value)
         end
         hash
diff --git a/test/faker/default/test_faker_json.rb b/test/faker/default/test_faker_json.rb
index a768329a2f..9bb0733569 100644
--- a/test/faker/default/test_faker_json.rb
+++ b/test/faker/default/test_faker_json.rb
@@ -1,10 +1,19 @@
 # frozen_string_literal: true
 
+require 'minitest/mock'
 require_relative '../../test_helper'
 
 class TestFakerJson < Test::Unit::TestCase
   require 'json'
 
+  def test_shallow_json_keeps_width_when_keys_collide
+    Faker::Config.stub :random, Random.new(0) do
+      json = Faker::Json.shallow_json(width: 2, options: { key: 'Boolean.boolean', value: 'Boolean.boolean' })
+
+      assert_equal 2, JSON.parse(json).size
+    end
+  end
+
   def test_simple_json_lenght
     expected_result_length = JSON.parse(simple_json).flatten.length