diff --git a/Cantera/cxx/demos/kinetics1/runtest b/Cantera/cxx/demos/kinetics1/runtest
index c200ea0a8..fa7fc82ab 100755
--- a/Cantera/cxx/demos/kinetics1/runtest
+++ b/Cantera/cxx/demos/kinetics1/runtest
@@ -31,7 +31,7 @@ fi
 diff -w output_0_blessed.txt output_0.txt > diff_out_0.txt
 retnStat_0=$?
 
-csvdiff -a 1.0E-50 kin1_blessed_0.csv kin1.csv  > diff_csv.txt
+csvdiff -a 1.0E-20 kin1_blessed_0.csv kin1.csv  > diff_csv.txt
 retnStat_csv_0=$?
 
 retnTotal=1