1 files changed, 2 insertions, 2 deletions
diff --git a/test/ruby/test_encoding.rb b/test/ruby/test_encoding.rb
index 5c1eb50bb1..0cd5bf49dc 100644
--- a/test/ruby/test_encoding.rb
+++ b/test/ruby/test_encoding.rb
@@ -154,7 +154,7 @@ class TestEncoding < Test::Unit::TestCase
         r, _obj = Ractor.select(*rs)
         rs.delete(r)
       end
-      assert rs.empty?
+      assert_empty rs
     end;
   end
 
@@ -173,7 +173,7 @@ class TestEncoding < Test::Unit::TestCase
       r, _obj = Ractor.select(*rs)
       rs.delete(r)
     end
-    assert rs.empty?
+    assert_empty rs
     end;
   end
 end