diff --git a/samples/python/onedim/adiabatic_flame.py b/samples/python/onedim/adiabatic_flame.py
index 9e0c6bde38..f9363f6769 100644
--- a/samples/python/onedim/adiabatic_flame.py
+++ b/samples/python/onedim/adiabatic_flame.py
@@ -52,4 +52,4 @@
 f.save(output, name="multi", description="solution with multicomponent transport")
 
 # write the velocity, temperature, density, and mole fractions to a CSV file
-f.save('adiabatic_flame.csv', basis="mole")
+f.save('adiabatic_flame.csv', basis="mole", overwrite=True)
diff --git a/samples/python/onedim/burner_flame.py b/samples/python/onedim/burner_flame.py
index 4d36ae5f5d..f59f8023c0 100644
--- a/samples/python/onedim/burner_flame.py
+++ b/samples/python/onedim/burner_flame.py
@@ -40,4 +40,4 @@
 f.show()
 f.save(output, name="multi", description="solution with multicomponent transport")
 
-f.save('burner_flame.csv.csv', basis="mole")
+f.save('burner_flame.csv', basis="mole", overwrite=True)
diff --git a/samples/python/onedim/diffusion_flame.py b/samples/python/onedim/diffusion_flame.py
index f0d5f607cf..7b16ad12be 100644
--- a/samples/python/onedim/diffusion_flame.py
+++ b/samples/python/onedim/diffusion_flame.py
@@ -64,7 +64,7 @@
 f.save(output)
 
 # write the velocity, temperature, and mole fractions to a CSV file
-f.save('diffusion_flame.csv', basis="mole")
+f.save('diffusion_flame.csv', basis="mole", overwrite=True)
 
 f.show_stats(0)
 
diff --git a/samples/python/onedim/flame_fixed_T.py b/samples/python/onedim/flame_fixed_T.py
index cb473914d4..8b4ca858f7 100644
--- a/samples/python/onedim/flame_fixed_T.py
+++ b/samples/python/onedim/flame_fixed_T.py
@@ -78,5 +78,5 @@
 f.save(output, name="multi", description="solution with multicomponent transport")
 
 # write the velocity, temperature, density, and mole fractions to a CSV file
-f.save('flame_fixed_T.csv', basis="mole")
+f.save('flame_fixed_T.csv', basis="mole", overwrite=True)
 f.show_stats()
diff --git a/samples/python/onedim/flame_initial_guess.py b/samples/python/onedim/flame_initial_guess.py
index 00abca337a..4414a6f354 100644
--- a/samples/python/onedim/flame_initial_guess.py
+++ b/samples/python/onedim/flame_initial_guess.py
@@ -59,7 +59,7 @@ def describe(flame):
 
 print("Save CSV")
 csv_filepath = output_path / "flame.csv"
-f.save(csv_filepath, basis="mole")
+f.save(csv_filepath, basis="mole", overwrite=True)
 
 if "native" in ct.hdf_support():
     # HDF is not a required dependency
diff --git a/samples/python/onedim/premixed_counterflow_flame.py b/samples/python/onedim/premixed_counterflow_flame.py
index 7d11d0fc05..7d3f7f06fc 100644
--- a/samples/python/onedim/premixed_counterflow_flame.py
+++ b/samples/python/onedim/premixed_counterflow_flame.py
@@ -53,6 +53,6 @@
 sim.save(output, name="mix", description="solution with mixture-averaged transport")
 
 # write the velocity, temperature, and mole fractions to a CSV file
-sim.save("premixed_counterflow_flame.csv", basis="mole")
+sim.save("premixed_counterflow_flame.csv", basis="mole", overwrite=True)
 sim.show_stats()
 sim.show()
diff --git a/samples/python/onedim/premixed_counterflow_twin_flame.py b/samples/python/onedim/premixed_counterflow_twin_flame.py
index 61cf7f4676..fa98d32873 100644
--- a/samples/python/onedim/premixed_counterflow_twin_flame.py
+++ b/samples/python/onedim/premixed_counterflow_twin_flame.py
@@ -127,7 +127,7 @@ def solveOpposedFlame(oppFlame, massFlux=0.12, loglevel=1,
 print(f"Peak temperature: {T:.1f} K")
 print(f"Strain Rate: {K:.1f} 1/s")
 print(f"Consumption Speed: {Sc * 100:.2f} cm/s")
-oppFlame.save("premixed_counterflow_twin_flame.csv", basis="mole")
+oppFlame.save("premixed_counterflow_twin_flame.csv", basis="mole", overwrite=True)
 
 # Generate plots to see results, if user desires
 if '--plot' in sys.argv:
diff --git a/samples/python/onedim/stagnation_flame.py b/samples/python/onedim/stagnation_flame.py
index cf71c433b7..2086cd7fd4 100644
--- a/samples/python/onedim/stagnation_flame.py
+++ b/samples/python/onedim/stagnation_flame.py
@@ -85,6 +85,6 @@
     sim.save(output, name=f"mdot-{m}", description=f"mdot = {md} kg/m2/s")
 
     # write the velocity, temperature, and mole fractions to a CSV file
-    sim.save(output_path / f"stagnation_flame_{m}.csv", basis="mole")
+    sim.save(output_path / f"stagnation_flame_{m}.csv", basis="mole", overwrite=True)
 
 sim.show_stats()
diff --git a/samples/python/surface_chemistry/catalytic_combustion.py b/samples/python/surface_chemistry/catalytic_combustion.py
index b0ee6def80..58b68840d1 100644
--- a/samples/python/surface_chemistry/catalytic_combustion.py
+++ b/samples/python/surface_chemistry/catalytic_combustion.py
@@ -117,6 +117,6 @@
 sim.save(filename, "soln1", description="catalytic combustion example")
 
 # save selected solution components in a CSV file for plotting in Excel or MATLAB.
-sim.save('catalytic_combustion.csv', basis="mole")
+sim.save('catalytic_combustion.csv', basis="mole", overwrite=True)
 
 sim.show_stats(0)