diff --git a/test/textbringer/test_buffer.rb b/test/textbringer/test_buffer.rb
index 04c4466..2c687bf 100644
--- a/test/textbringer/test_buffer.rb
+++ b/test/textbringer/test_buffer.rb
@@ -1762,10 +1762,8 @@ def test_binary
     end
     buffer.beginning_of_buffer
     buffer.forward_char(0xe3)
-    assert_equal((+"\xe3").force_encoding(Encoding::ASCII_8BIT),
-                 buffer.byte_after)
-    assert_equal((+"\xe3").force_encoding(Encoding::ASCII_8BIT),
-                 buffer.char_after)
+    assert_equal((+"\xe3").b, buffer.byte_after)
+    assert_equal((+"\xe3").b, buffer.char_after)
     buffer = Buffer.new(data, file_encoding: "ascii-8bit")
     assert_equal(true, buffer.binary?)
   end