diff --git a/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest b/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest
index c4b4c05a1..a194e6e53 100755
--- a/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest
+++ b/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest
@@ -40,7 +40,7 @@ then
 fi
 
 retnCSVTotal=1
-if test $retnStat_csv_0 = "1" 
+if test $retnStat_csv_0 = "0" 
 then
   retnCSVTotal=0
 fi