diff --git a/model/atmosphere/diffusion/src/icon4py/model/atmosphere/diffusion/diffusion.py b/model/atmosphere/diffusion/src/icon4py/model/atmosphere/diffusion/diffusion.py
index ad3a919de5..720d3af2aa 100644
--- a/model/atmosphere/diffusion/src/icon4py/model/atmosphere/diffusion/diffusion.py
+++ b/model/atmosphere/diffusion/src/icon4py/model/atmosphere/diffusion/diffusion.py
@@ -105,7 +105,7 @@ class TemperatureDiscretizationType(int, enum.Enum):
     """
 
     HOMOGENEOUS = 1  #: K Lap(T)
-    HETEROGENOUS = 2  #: Div (K Grad(T))
+    HETEROGENEOUS = 2  #: Div (K Grad(T))
 
 
 class TurbulenceShearForcingType(int, enum.Enum):
@@ -136,7 +136,7 @@ class TurbulenceShearForcingType(int, enum.Enum):
     SmagorinskyStencilType.DIAMOND_VERTICES, SmagorinskyStencilType.CELLS_AND_VERTICES
 ]
 ValidTemperatureDiscretizationType = Literal[
-    TemperatureDiscretizationType.HOMOGENEOUS, TemperatureDiscretizationType.HETEROGENOUS
+    TemperatureDiscretizationType.HOMOGENEOUS, TemperatureDiscretizationType.HETEROGENEOUS
 ]
 ValidTurbulenceShearForcingType = Literal[
     TurbulenceShearForcingType.VERTICAL_OF_HORIZONTAL_WIND,
@@ -167,7 +167,7 @@ def __init__(
         hdiff_smag_w: bool = False,
         type_vn_diffu: ValidSmagorinskyStencilType = SmagorinskyStencilType.DIAMOND_VERTICES,
         smag_3d: bool = False,
-        type_t_diffu: ValidTemperatureDiscretizationType = TemperatureDiscretizationType.HETEROGENOUS,
+        type_t_diffu: ValidTemperatureDiscretizationType = TemperatureDiscretizationType.HETEROGENEOUS,
         hdiff_efdt_ratio: float = 36.0,
         hdiff_w_efdt_ratio: float = 15.0,
         smagorinski_scaling_factor: float = 0.015,
@@ -309,7 +309,7 @@ def _validate(self):
                 "Only type_vn_diffu 1 = `Smagorinsky diffusion with diamond stencil on vertices` is implemented"
             )
 
-        if self.type_t_diffu != TemperatureDiscretizationType.HETEROGENOUS:
+        if self.type_t_diffu != TemperatureDiscretizationType.HETEROGENEOUS:
             raise NotImplementedError(
                 "Only type_t_diffu 2 = `Smagorinsky diffusion with heterogeneous discretization` is implemented"
             )
diff --git a/model/standalone_driver/src/icon4py/model/standalone_driver/standalone_driver.py b/model/standalone_driver/src/icon4py/model/standalone_driver/standalone_driver.py
index da7474f905..85e3dcd26d 100644
--- a/model/standalone_driver/src/icon4py/model/standalone_driver/standalone_driver.py
+++ b/model/standalone_driver/src/icon4py/model/standalone_driver/standalone_driver.py
@@ -502,8 +502,8 @@ def _read_config(
         hdiff_vn=True,
         hdiff_temp=False,
         n_substeps=5,
-        type_t_diffu=2,
-        type_vn_diffu=1,
+        type_t_diffu=diffusion.TemperatureDiscretizationType.HETEROGENEOUS,
+        type_vn_diffu=diffusion.SmagorinskyStencilType.DIAMOND_VERTICES,
         hdiff_efdt_ratio=10.0,
         hdiff_w_efdt_ratio=15.0,
         smagorinski_scaling_factor=0.025,
diff --git a/model/testing/src/icon4py/model/testing/definitions.py b/model/testing/src/icon4py/model/testing/definitions.py
index 3f43a826f6..a6a011b9dd 100644
--- a/model/testing/src/icon4py/model/testing/definitions.py
+++ b/model/testing/src/icon4py/model/testing/definitions.py
@@ -241,7 +241,7 @@ def construct_diffusion_config(
             diffusion_type=diffusion.DiffusionType.SMAGORINSKY_4TH_ORDER,
             hdiff_w=True,
             hdiff_vn=True,
-            type_t_diffu=diffusion.TemperatureDiscretizationType.HETEROGENOUS,
+            type_t_diffu=diffusion.TemperatureDiscretizationType.HETEROGENEOUS,
             type_vn_diffu=diffusion.SmagorinskyStencilType.DIAMOND_VERTICES,
             hdiff_efdt_ratio=24.0,
             hdiff_w_efdt_ratio=15.0,
@@ -260,7 +260,7 @@ def construct_diffusion_config(
             hdiff_w=True,
             hdiff_vn=True,
             zdiffu_t=False,
-            type_t_diffu=diffusion.TemperatureDiscretizationType.HETEROGENOUS,
+            type_t_diffu=diffusion.TemperatureDiscretizationType.HETEROGENEOUS,
             type_vn_diffu=diffusion.SmagorinskyStencilType.DIAMOND_VERTICES,
             hdiff_efdt_ratio=24.0,
             smagorinski_scaling_factor=0.025,