diff --git a/lib/doc/Development.lyx b/lib/doc/Development.lyx
index 12447caf11..839b70054c 100644
--- a/lib/doc/Development.lyx
+++ b/lib/doc/Development.lyx
@@ -3369,7 +3369,9 @@ If an
 \emph on
 inverted
 \emph default
- test case fails because the export now works, 
+ test case fails because the export now works, first confirm that the output
+ of the corresponding export looks good (e.g., not garbled text).
+ Then, 
 \emph on
 uninvert
 \emph default