diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 0fd49d232d..e8decc0386 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -894,8 +894,6 @@ class TestString < Test::Unit::TestCase
     assert_not_equal(S("a").hash, S("a\0").hash, bug4104)
     bug9172 = '[ruby-core:58658] [Bug #9172]'
     assert_not_equal(S("sub-setter").hash, S("discover").hash, bug9172)
-    bug9882 = '[ruby-core:62842] [Bug #9882]'
-    assert_equal(S(bug9882).hash, S("\u{30c6 30b9 30c8 2019}#{bug9882}")[4..-1].hash, bug9882)
   end
 
   def test_hash_random
@@ -1197,6 +1195,11 @@ class TestString < Test::Unit::TestCase
     assert_equal(S("Bar"), S("FooBar").slice(S("Bar")))
     assert_nil(S("FooBar").slice(S("xyzzy")))
     assert_nil(S("FooBar").slice(S("plugh")))
+
+    bug9882 = '[ruby-core:62842] [Bug #9882]'
+    substr = S("\u{30c6 30b9 30c8 2019}#{bug9882}").slice(4..-1)
+    assert_equal(S(bug9882).hash, substr.hash, bug9882)
+    assert_predicate(substr, :ascii_only?, bug9882)
   end
 
   def test_slice!