diff --git a/ICSharpCode.Decompiler.Tests/PdbGenerationTestRunner.cs b/ICSharpCode.Decompiler.Tests/PdbGenerationTestRunner.cs
index 81a3d6277..dd5ea53d3 100644
--- a/ICSharpCode.Decompiler.Tests/PdbGenerationTestRunner.cs
+++ b/ICSharpCode.Decompiler.Tests/PdbGenerationTestRunner.cs
@@ -93,7 +93,7 @@ namespace ICSharpCode.Decompiler.Tests
 			foreach (var file in document.Descendants("file"))
 			{
 				file.Attribute("checksum").Remove();
-				file.Attribute("embeddedSourceLength").Remove();
+				file.Attribute("embeddedSourceLength")?.Remove();
 				file.ReplaceNodes(new XCData(file.Value.Replace("\uFEFF", "")));
 			}
 			document.Save(fileName, SaveOptions.None);