diff --git a/tests/test_pdfminer_psparser.py b/tests/test_pdfminer_psparser.py
index 8d25112..d72386f 100644
--- a/tests/test_pdfminer_psparser.py
+++ b/tests/test_pdfminer_psparser.py
@@ -332,8 +332,8 @@ def test_new_parser_strings() -> None:
     list_parsers(b"(foo\r)", [(0, b"foo\n")])
     list_parsers(b"(foo\r\nbar\r\nbaz)", [(0, b"foo\nbar\nbaz")])
     list_parsers(b"(foo\n)", [(0, b"foo\n")])
-    list_parsers(br"(foo\r\nbaz)", [(0, b"foo\r\nbaz")])
-    list_parsers(br"(foo\r\nbar\r\nbaz)", [(0, b"foo\r\nbar\r\nbaz")])
+    list_parsers(rb"(foo\r\nbaz)", [(0, b"foo\r\nbaz")])
+    list_parsers(rb"(foo\r\nbar\r\nbaz)", [(0, b"foo\r\nbar\r\nbaz")])
     list_parsers(
         rb"( This string contains \245two octal characters\307 . )",
         [(0, b" This string contains \245two octal characters\307 . ")],