diff --git a/TODO b/TODO
index 0bd28ad..d7e0ab4 100644
--- a/TODO
+++ b/TODO
@@ -3,6 +3,13 @@ Soon
 
  * Set up OSS-Fuzz (Google). See starred email in qpdf label.
 
+ * Get to the bottom of Windows test fragility. The symptom is that
+   sometimes the output of a command is truncated even though the
+   command ran successfully. I strongly suspect it has to do with
+   TestDriver->winrun and/or use of temporary files in qtest for
+   Windows. If found, remove workarounds. Search for sleep to find
+   them.
+
 Next ABI
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