diff --git a/lms/services/dashboard.py b/lms/services/dashboard.py
index 9df963fed2..12cbd18e99 100644
--- a/lms/services/dashboard.py
+++ b/lms/services/dashboard.py
@@ -187,7 +187,9 @@ def get_assignment_roster(
                 "dashboard", "rosters"
             )
         )
-        roster_last_updated = self._roster_service.assignment_roster_exists(assignment)
+        roster_last_updated = self._roster_service.assignment_roster_last_updated(
+            assignment
+        )
 
         if rosters_enabled and roster_last_updated:
             # If rostering is enabled and we do have the data, use it
diff --git a/lms/services/roster.py b/lms/services/roster.py
index e37aca76be..3d1e568971 100644
--- a/lms/services/roster.py
+++ b/lms/services/roster.py
@@ -65,12 +65,8 @@ def get_course_roster(
 
         return select(LMSUser).where(LMSUser.id.in_(roster_query))
 
-    def assignment_roster_exists(self, assignment: Assignment) -> datetime | None:
-        """
-        Check if we have roster data for the given assignment.
-
-        In case we have roster data, return the last updated timestamp, None otherwise.
-        """
+    def assignment_roster_last_updated(self, assignment: Assignment) -> datetime | None:
+        """Return the roster's last updated timestamp for given assignment, or None if we don't have roster data."""
         return self._db.scalar(
             select(AssignmentRoster.updated)
             .where(AssignmentRoster.assignment_id == assignment.id)
diff --git a/tests/unit/lms/services/dashboard_test.py b/tests/unit/lms/services/dashboard_test.py
index a2cf20e5d3..a8bc8a81ac 100644
--- a/tests/unit/lms/services/dashboard_test.py
+++ b/tests/unit/lms/services/dashboard_test.py
@@ -233,7 +233,7 @@ def test_get_assignment_roster_with_roster_disabled(
             course=factories.Course(application_instance=application_instance)
         )
         if not roster_available:
-            roster_service.assignment_roster_exists.return_value = None
+            roster_service.assignment_roster_last_updated.return_value = None
 
         last_updated, roster = svc.get_assignment_roster(assignment, sentinel.h_userids)
 
@@ -256,7 +256,10 @@ def test_get_assignment_roster_with_roster_disabled(
                 role_type=RoleType.LEARNER,
                 h_userids=sentinel.h_userids,
             )
-            assert last_updated == roster_service.assignment_roster_exists.return_value
+            assert (
+                last_updated
+                == roster_service.assignment_roster_last_updated.return_value
+            )
             assert (
                 roster
                 == roster_service.get_assignment_roster.return_value.order_by.return_value
diff --git a/tests/unit/lms/services/roster_test.py b/tests/unit/lms/services/roster_test.py
index a872cfe79f..6cc5e8cce9 100644
--- a/tests/unit/lms/services/roster_test.py
+++ b/tests/unit/lms/services/roster_test.py
@@ -16,7 +16,7 @@ class TestRosterService:
         "create_roster,expected",
         [(True, datetime(2021, 1, 1)), (False, None)],
     )
-    def test_assignment_roster_exists(
+    def test_assignment_roster_last_updated(
         self, svc, assignment, db_session, create_roster, expected
     ):
         lms_user = factories.LMSUser()
@@ -32,7 +32,7 @@ def test_assignment_roster_exists(
             )
         db_session.flush()
 
-        assert svc.assignment_roster_exists(assignment) == expected
+        assert svc.assignment_roster_last_updated(assignment) == expected
 
     @pytest.mark.parametrize("with_role_scope", [True, False])
     @pytest.mark.parametrize("with_role_type", [True, False])