diff --git a/src/UglyToad.PdfPig.Tests/PublicApiScannerTests.cs b/src/UglyToad.PdfPig.Tests/PublicApiScannerTests.cs
index 650063c1..586bc4bc 100644
--- a/src/UglyToad.PdfPig.Tests/PublicApiScannerTests.cs
+++ b/src/UglyToad.PdfPig.Tests/PublicApiScannerTests.cs
@@ -196,6 +196,7 @@
                 "UglyToad.PdfPig.Util.Adler32Checksum",
                 "UglyToad.PdfPig.Util.IWordExtractor",
                 "UglyToad.PdfPig.Util.DefaultWordExtractor",
+                "UglyToad.PdfPig.Util.DateFormatHelper",
                 "UglyToad.PdfPig.Writer.PdfAStandard",
                 "UglyToad.PdfPig.Writer.PdfDocumentBuilder",
                 "UglyToad.PdfPig.Writer.PdfMerger",