diff --git a/lib/auth/session.ex b/lib/auth/session.ex
index 7b907a83..a9a382f9 100644
--- a/lib/auth/session.ex
+++ b/lib/auth/session.ex
@@ -78,11 +78,20 @@ defmodule Auth.Session do
   end
 
   @doc """
-  `end_session/1` update session to end it.
+  `update_session_end/1` update session to end it.
   """
-  def end_session(conn) do
+  def update_session_end(conn) do
     get(conn)
     |> changeset(%{end: DateTime.utc_now()})
     |> Repo.update!()
   end
+
+
+  @doc """
+  `end_session/1` update session to end it.
+  """
+  def end_session(conn) do
+    update_session_end(conn)
+    update_in(conn.assigns, &Map.drop(&1, [:sid]))
+  end
 end
diff --git a/test/auth/session_test.exs b/test/auth/session_test.exs
index 556dfacf..7007c4e3 100644
--- a/test/auth/session_test.exs
+++ b/test/auth/session_test.exs
@@ -1,5 +1,5 @@
 defmodule Auth.SessionTest do
-  use AuthWeb.ConnCase
+  use AuthWeb.ConnCase, async: true
 
   test "Auth.Session.insert/1 inserts a session record", %{conn: conn} do
     conn = non_admin_login(conn)
@@ -34,7 +34,7 @@ defmodule Auth.SessionTest do
     assert ses.end == nil
   end
 
-  test "Auth.Session.end_session/1 updates the session record", %{conn: conn} do
+  test "Auth.Session.update_session_end/1 updates the session record", %{conn: conn} do
     conn = non_admin_login(conn)
     session = Auth.Session.insert(conn)
     
@@ -42,9 +42,24 @@ defmodule Auth.SessionTest do
     assert session.end == nil
 
     # End the Session:
-    updated = Auth.Session.end_session(conn)
+    updated = Auth.Session.update_session_end(conn)
     
     # Confirm the end value has been set.
     assert updated.end == updated.updated_at
   end
+
+  test "Auth.Session.end_session/1 terminates the session", %{conn: conn} do
+    conn = conn |> non_admin_login() |> Auth.Session.start_session()
+
+    session = Auth.Session.get(conn)
+    # The Session is set on conn.assigns
+    assert session.id == conn.assigns.sid
+
+    # Initially the session.end is nil (i.e. not yet ended)
+    assert session.end == nil
+
+    # End the Session:
+    conn = Auth.Session.end_session(conn)
+    assert Map.get(conn.assigns, :sid) == nil
+  end
 end