diff --git a/energy_models/tests/jacobian_pkls/jacobian_FossilSimpleTechno_FossilSimpleTechno_construction_delay_0.pkl b/energy_models/tests/jacobian_pkls/jacobian_FossilSimpleTechno_FossilSimpleTechno_construction_delay_0.pkl
index 3447681d..8fbdb40f 100644
Binary files a/energy_models/tests/jacobian_pkls/jacobian_FossilSimpleTechno_FossilSimpleTechno_construction_delay_0.pkl and b/energy_models/tests/jacobian_pkls/jacobian_FossilSimpleTechno_FossilSimpleTechno_construction_delay_0.pkl differ
diff --git a/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_all_years.pkl b/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_all_years.pkl
index 6b48be73..1141e77f 100644
Binary files a/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_all_years.pkl and b/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_all_years.pkl differ
diff --git a/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_poles.pkl b/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_poles.pkl
index 06e54c8d..d97bddd7 100644
Binary files a/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_poles.pkl and b/energy_models/tests/jacobian_pkls/jacobian_investments_profile_builder_disc_poles.pkl differ
diff --git a/energy_models/tests/l0_test_compute_energy_mix.py b/energy_models/tests/l0_test_compute_energy_mix.py
index 8e56a19c..37d60e17 100644
--- a/energy_models/tests/l0_test_compute_energy_mix.py
+++ b/energy_models/tests/l0_test_compute_energy_mix.py
@@ -355,7 +355,7 @@ def test_02_energy_mix_discipline(self):
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.EnergyPricesValue}': self.prices_hydro,
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.EnergyTypeCapitalDfValue}': self.energy_type_capital,
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.CO2PerUse}': pd.DataFrame(
-                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2Tax: 0.0, GlossaryEnergy.CO2PerUse: 0.0}),
+                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2PerUse: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.CO2EmissionsValue}': pd.DataFrame(
                            {GlossaryEnergy.Years: self.years, f'{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}': 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.LandUseRequiredValue}': self.land_use_required_mock,
@@ -374,7 +374,7 @@ def test_02_energy_mix_discipline(self):
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.EnergyPricesValue}': self.cost_details,
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.EnergyTypeCapitalDfValue}': self.energy_type_capital,
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.CO2PerUse}': pd.DataFrame(
-                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2Tax: 0.0, GlossaryEnergy.CO2PerUse: 0.0}),
+                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2PerUse: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.CO2EmissionsValue}': pd.DataFrame(
                            {GlossaryEnergy.Years: self.years, GlossaryEnergy.methane: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.LandUseRequiredValue}': self.land_use_required_mock,
@@ -447,7 +447,7 @@ def test_03_energy_mix_discipline_exponential_limit(self):
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.EnergyProcductionWithoutRatioValue}': self.production_hydro,
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.EnergyPricesValue}': self.prices_hydro,
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.CO2PerUse}': pd.DataFrame(
-                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2Tax: 0.0, GlossaryEnergy.CO2PerUse: 0.0}),
+                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2PerUse: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.CO2EmissionsValue}': pd.DataFrame(
                            {GlossaryEnergy.Years: self.years, f'{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}': 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.LandUseRequiredValue}': self.land_use_required_mock,
@@ -459,7 +459,7 @@ def test_03_energy_mix_discipline_exponential_limit(self):
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.EnergyProcductionWithoutRatioValue}': self.production,
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.EnergyPricesValue}': self.cost_details,
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.CO2PerUse}': pd.DataFrame(
-                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2Tax: 0.0, GlossaryEnergy.CO2PerUse: 0.0}),
+                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2PerUse: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.CO2EmissionsValue}': pd.DataFrame(
                            {GlossaryEnergy.Years: self.years, GlossaryEnergy.methane: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.LandUseRequiredValue}': self.land_use_required_mock,
@@ -530,7 +530,7 @@ def test_04_energy_mix_resource(self):
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.EnergyProcductionWithoutRatioValue}': self.production_hydro,
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.EnergyPricesValue}': self.prices_hydro,
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.CO2PerUse}': pd.DataFrame(
-                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2Tax: 0.0, GlossaryEnergy.CO2PerUse: 0.0}),
+                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2PerUse: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.CO2EmissionsValue}': pd.DataFrame(
                            {GlossaryEnergy.Years: self.years, f'{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}': 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.hydrogen}.{GlossaryEnergy.gaseous_hydrogen}.{GlossaryEnergy.LandUseRequiredValue}': self.land_use_required_mock,
@@ -542,7 +542,7 @@ def test_04_energy_mix_resource(self):
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.EnergyProcductionWithoutRatioValue}': self.production,
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.EnergyPricesValue}': self.cost_details,
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.CO2PerUse}': pd.DataFrame(
-                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2Tax: 0.0, GlossaryEnergy.CO2PerUse: 0.0}),
+                           {GlossaryEnergy.Years: self.years, GlossaryEnergy.CO2PerUse: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.CO2EmissionsValue}': pd.DataFrame(
                            {GlossaryEnergy.Years: self.years, GlossaryEnergy.methane: 0.0}),
                        f'{name}.{model_name}.{GlossaryEnergy.methane}.{GlossaryEnergy.LandUseRequiredValue}': self.land_use_required_mock,