Confirmed restart did not change session id.

tests/step_defs/conftest.py

@@ -4,6 +4,7 @@ from pytest import fixture
 from .server import Server
 from .page import Page
 
+
 @fixture
 def server():
     """Create a server instance."""
@@ -11,7 +12,14 @@ def server():
     yield serv
     serv.destroy()
 
+
 @fixture
 def page():
-    pg = Page()
-    return pg
+    """Return a page for testing."""
+    return Page()
+
+
+@fixture
+def data_store():
+    """Return a dictionary to hold between function test data."""
+    return {}