diff --git a/pydantic_tfl_api/models/disruption.py b/pydantic_tfl_api/models/disruption.py
index 424fd37..cb67f33 100644
--- a/pydantic_tfl_api/models/disruption.py
+++ b/pydantic_tfl_api/models/disruption.py
@@ -11,10 +11,10 @@ class Disruption(BaseModel):
     disruption_type: str = Field(alias='type')
     category_description: str = Field(alias='categoryDescription')
     description: str = Field(alias='description')
-    summary: str = Field(alias='summary')
-    additional_info: str = Field(alias='additionalInfo')
-    created: datetime = Field(alias='created')
-    last_update: datetime = Field(alias='lastUpdate')
+    summary: Optional[str] = Field(None, alias='summary')
+    additional_info: Optional[str] = Field(None, alias='additionalInfo')
+    created: Optional[datetime] = Field(None, alias='created')
+    last_update: Optional[datetime] = Field(None, alias='lastUpdate')
     affected_routes: List[AffectedRoute] = Field(alias='affectedRoutes')
     affected_stops: List[StopPoint] = Field(alias='affectedStops')
     closure_text: str = Field(alias='closureText')
diff --git a/tests/config_for_tests.py b/tests/config_for_tests.py
index 682c866..9da0f0d 100644
--- a/tests/config_for_tests.py
+++ b/tests/config_for_tests.py
@@ -157,35 +157,35 @@
         "endpoint": "lineDisruptionsByLineId",
         "endpoint_args": ["victoria,northern"],
         "endpoint_params": {},
-        "model": "Line",
+        "model": "Disruption",
         "result_is_empty": True,
     },
     "lineDisruptionsByLineId_piccadilly_None_Line": {
         "endpoint": "lineDisruptionsByLineId",
         "endpoint_args": ["piccadilly"],
         "endpoint_params": {},
-        "model": "Line",
+        "model": "Disruption",
         "result_is_empty": False,
     },    
     "lineDisruptionsByLineId_14_None_Line": {
         "endpoint": "lineDisruptionsByLineId",
         "endpoint_args": ["14"],
         "endpoint_params": {},
-        "model": "Line",
+        "model": "Disruption",
         "result_is_empty": True,
     },
     "lineDisruptionsByMode_tube_None_Line": {
         "endpoint": "lineDisruptionsByMode",
         "endpoint_args": ["tube"],
         "endpoint_params": {},
-        "model": "Line",
+        "model": "Disruption",
         "result_is_empty": False,
     },
     "lineDisruptionsByMode_tube_overground_None_Line": {
         "endpoint": "lineDisruptionsByMode",
         "endpoint_args": ["tube,overground"],
         "endpoint_params": {},
-        "model": "Line",
+        "model": "Disruption",
         "result_is_empty": False,
     },
     "stopPointById_940GZZLUASL_None_StopPoint": {