diff --git a/test/ruby/test_rand.rb b/test/ruby/test_rand.rb
index 140851d5ba..f32696cf10 100644
--- a/test/ruby/test_rand.rb
+++ b/test/ruby/test_rand.rb
@@ -166,7 +166,6 @@ class TestRand < Test::Unit::TestCase
   end
 
   def test_big_seed
-    srand(2**1000000-1)
-    assert_equal(1143843490, rand(0x100000000))
+    assert_random_int(%w(1143843490), 0x100000000, 2**1000000-1)
   end
 end