diff --git a/docs/changelog.rst b/docs/changelog.rst
index 19cac15681..3d03151321 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -8,6 +8,7 @@ Changelog
 
 - ``ExecutionEvent.asdict`` adds the ``event_type`` field which is the event class name.
 - Add API schema to the ``Initialized`` event.
+- **Internal**: Add ``SerializedCase.cookies``
 
 `3.9.0`_ - 2021-06-07
 ---------------------
diff --git a/src/schemathesis/runner/serialization.py b/src/schemathesis/runner/serialization.py
index 7228fc8d52..4e172d200d 100644
--- a/src/schemathesis/runner/serialization.py
+++ b/src/schemathesis/runner/serialization.py
@@ -21,6 +21,7 @@ class SerializedCase:
     path_template: str = attr.ib()
     path_parameters: Optional[Dict[str, Any]] = attr.ib()
     query: Optional[Dict[str, Any]] = attr.ib()
+    cookies: Optional[Dict[str, Any]] = attr.ib()
     verbose_name: str = attr.ib()
     media_type: Optional[str] = attr.ib()
 
@@ -33,6 +34,7 @@ def from_case(cls, case: Case, headers: Optional[Dict[str, Any]]) -> "Serialized
             path_template=case.path,
             path_parameters=case.path_parameters,
             query=case.query,
+            cookies=case.cookies,
             verbose_name=case.operation.verbose_name,
             media_type=case.media_type,
         )