diff --git a/src/ert/config/ensemble_config.py b/src/ert/config/ensemble_config.py
index 1c321c04e0b..85bf942dd04 100644
--- a/src/ert/config/ensemble_config.py
+++ b/src/ert/config/ensemble_config.py
@@ -52,8 +52,8 @@ class EnsembleConfig:
     response_configs: Dict[str, Union[SummaryConfig, GenDataConfig]] = field(
         default_factory=dict
     )
-    parameter_configs: Dict[str, Union[GenKwConfig, FieldConfig, SurfaceConfig]] = field(
-       default_factory=dict
+    parameter_configs: Dict[str, Union[GenKwConfig, FieldConfig, SurfaceConfig]] = (
+        field(default_factory=dict)
     )
     refcase: Optional[Refcase] = None
     eclbase: Optional[str] = None
@@ -97,7 +97,7 @@ def from_dict(cls, config_dict: ConfigDict) -> EnsembleConfig:
                     grid_file_path,
                 ) from err
 
-        def make_field(field_list: List[str]) -> Field:
+        def make_field(field_list: List[str]) -> FieldConfig:
             if grid_file_path is None:
                 raise ConfigValidationError.with_context(
                     "In order to use the FIELD keyword, a GRID must be supplied.",
@@ -108,7 +108,7 @@ def make_field(field_list: List[str]) -> Field:
                     f"Grid file {grid_file_path} did not contain dimensions",
                     grid_file_path,
                 )
-            return Field.from_config_list(grid_file_path, dims, field_list)
+            return FieldConfig.from_config_list(grid_file_path, dims, field_list)
 
         parameter_configs = (
             [GenKwConfig.from_config_list(g) for g in gen_kw_list]