diff --git a/rdata/tests/test_rdata.py b/rdata/tests/test_rdata.py
index 6d925ce..c2e6436 100644
--- a/rdata/tests/test_rdata.py
+++ b/rdata/tests/test_rdata.py
@@ -717,11 +717,15 @@ def test_ascii(self) -> None:
 
     def test_ascii_characters(self) -> None:
         """Test reading string with all ascii printable characters."""
+        # File created in R with
+        # saveRDS("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\v\f\r\n", file="test_ascii_chars.rds")  # noqa: E501,ERA001
         data = rdata.read_rds(TESTDATA_PATH / "test_ascii_chars.rds")
         assert data == "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\v\f\r\n", data  # noqa: E501
 
     def test_ascii_ascii_characters(self) -> None:
         """Test reading string with all ascii printable characters."""
+        # File created in R with
+        # saveRDS("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\v\f\r\n", file="test_ascii_ascii_chars.rds", ascii=TRUE, compress=FALSE)  # noqa: E501,ERA001
         data = rdata.read_rds(TESTDATA_PATH / "test_ascii_ascii_chars.rds")
         assert data == "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\v\f\r\n", data  # noqa: E501