diff --git a/Cantera/python/examples/equilibrium/adiabatic_flame/runtest b/Cantera/python/examples/equilibrium/adiabatic_flame/runtest
index cbfce547c..6b25bbc0d 100755
--- a/Cantera/python/examples/equilibrium/adiabatic_flame/runtest
+++ b/Cantera/python/examples/equilibrium/adiabatic_flame/runtest
@@ -30,7 +30,7 @@ fi
 diff -w output_blessed_0.txt output_0.txt > diff_out_0.txt
 retnStat_0=$?
 
-csvdiff -a 1.0E-50 adiabatic_blessed_0.csv adiabatic.csv  > diff_csv.txt
+csvdiff -a 1.0E-15 adiabatic_blessed_0.csv adiabatic.csv  > diff_csv.txt
 retnStat_csv_0=$?
 
 retnTotal=1
diff --git a/Cantera/python/examples/equilibrium/multiphase_plasma/runtest b/Cantera/python/examples/equilibrium/multiphase_plasma/runtest
index 3c2ffa436..3b5a28687 100755
--- a/Cantera/python/examples/equilibrium/multiphase_plasma/runtest
+++ b/Cantera/python/examples/equilibrium/multiphase_plasma/runtest
@@ -30,7 +30,7 @@ fi
 diff -w output_blessed_0.txt output_0.txt > diff_out_0.txt
 retnStat_0=$?
 
-csvdiff -a 1.0E-50 equil_koh_blessed_0.csv equil_koh.csv  > diff_csv.txt
+csvdiff -a 1.0E-15 equil_koh_blessed_0.csv equil_koh.csv  > diff_csv.txt
 retnStat_csv_0=$?
 
 retnTotal=1
diff --git a/Cantera/python/examples/reactors/reactor2_sim/runtest b/Cantera/python/examples/reactors/reactor2_sim/runtest
index 60081f6ce..1fd67f2e4 100755
--- a/Cantera/python/examples/reactors/reactor2_sim/runtest
+++ b/Cantera/python/examples/reactors/reactor2_sim/runtest
@@ -30,7 +30,7 @@ fi
 diff -w output_blessed_0.txt output_0.txt > diff_out_0.txt
 retnStat_0=$?
 
-csvdiff -a 1.0E-50 piston_blessed_0.csv piston.csv  > diff_csv.txt
+csvdiff -a 1.0E-15 piston_blessed_0.csv piston.csv  > diff_csv.txt
 retnStat_csv_0=$?
 
 retnTotal=1
diff --git a/Cantera/python/examples/surface_chemistry/catcomb_stagflow/runtest b/Cantera/python/examples/surface_chemistry/catcomb_stagflow/runtest
index 52244ce78..3048b8df8 100755
--- a/Cantera/python/examples/surface_chemistry/catcomb_stagflow/runtest
+++ b/Cantera/python/examples/surface_chemistry/catcomb_stagflow/runtest
@@ -30,7 +30,7 @@ fi
 diff -w output_blessed_0.txt output_0.txt > diff_out_0.txt
 retnStat_0=$?
 
-csvdiff -a 1.0E-50 catcomb_blessed_0.csv catcomb.csv  > diff_csv.txt
+csvdiff -a 1.0E-15 catcomb_blessed_0.csv catcomb.csv  > diff_csv.txt
 retnStat_csv_0=$?
 
 retnTotal=1
diff --git a/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest b/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest
index eeb31afe3..c4b4c05a1 100755
--- a/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest
+++ b/Cantera/python/examples/surface_chemistry/diamond_cvd/runtest
@@ -30,7 +30,7 @@ fi
 diff -w output_blessed_0.txt output_0.txt > diff_out_0.txt
 retnStat_0=$?
 
-csvdiff -a 1.0E-50 diamond_blessed_0.csv diamond.csv  > diff_csv.txt
+csvdiff -a 1.0E-15 diamond_blessed_0.csv diamond.csv  > diff_csv.txt
 retnStat_csv_0=$?
 
 retnTotal=1