diff --git a/benefits/enrollment/views.py b/benefits/enrollment/views.py
index c0abdeaee..ddf8a2cdf 100644
--- a/benefits/enrollment/views.py
+++ b/benefits/enrollment/views.py
@@ -102,7 +102,7 @@ def index(request):
                 if not already_enrolled:
                     # enroll user with an expiration date, return success
                     client.link_concession_group_funding_source(
-                        group_id=group_id, funding_source_id=funding_source.id, expiry_date=session.enrollment_expiry(request)
+                        group_id=group_id, funding_source_id=funding_source.id, expiry=session.enrollment_expiry(request)
                     )
                     return success(request)
                 else:  # already_enrolled
@@ -111,7 +111,7 @@ def index(request):
                         client.update_concession_group_funding_source_expiry(
                             group_id=group_id,
                             funding_source_id=funding_source.id,
-                            expiry_date=session.enrollment_expiry(request),
+                            expiry=session.enrollment_expiry(request),
                         )
                         return success(request)
                     else:
@@ -125,7 +125,7 @@ def index(request):
                             client.update_concession_group_funding_source_expiry(
                                 group_id=group_id,
                                 funding_source_id=funding_source.id,
-                                expiry_date=session.enrollment_expiry(request),
+                                expiry=session.enrollment_expiry(request),
                             )
                             return success(request)
                         else:
diff --git a/tests/pytest/enrollment/test_views.py b/tests/pytest/enrollment/test_views.py
index dbab785e2..2c3f2b886 100644
--- a/tests/pytest/enrollment/test_views.py
+++ b/tests/pytest/enrollment/test_views.py
@@ -311,7 +311,7 @@ def test_index_eligible_post_valid_form_success_supports_expiration(
     mock_client.link_concession_group_funding_source.assert_called_once_with(
         funding_source_id=mocked_funding_source.id,
         group_id=model_EligibilityType_supports_expiration.group_id,
-        expiry_date=mocked_session_enrollment_expiry.return_value,
+        expiry=mocked_session_enrollment_expiry.return_value,
     )
     assert response.status_code == 200
     assert response.template_name == TEMPLATE_SUCCESS
@@ -343,7 +343,7 @@ def test_index_eligible_post_valid_form_success_supports_expiration_no_expiry(
     mock_client.update_concession_group_funding_source_expiry.assert_called_once_with(
         funding_source_id=mocked_funding_source.id,
         group_id=model_EligibilityType_supports_expiration.group_id,
-        expiry_date=mocked_session_enrollment_expiry.return_value,
+        expiry=mocked_session_enrollment_expiry.return_value,
     )
     assert response.status_code == 200
     assert response.template_name == TEMPLATE_SUCCESS
@@ -414,7 +414,7 @@ def test_index_eligible_post_valid_form_success_supports_expiration_is_expired(
     mock_client.update_concession_group_funding_source_expiry.assert_called_once_with(
         funding_source_id=mocked_funding_source.id,
         group_id=model_EligibilityType_supports_expiration.group_id,
-        expiry_date=mocked_session_enrollment_expiry.return_value,
+        expiry=mocked_session_enrollment_expiry.return_value,
     )
     assert response.status_code == 200
     assert response.template_name == TEMPLATE_SUCCESS
@@ -524,7 +524,7 @@ def test_index_eligible_post_valid_form_success_supports_expiration_is_within_re
     mock_client.update_concession_group_funding_source_expiry.assert_called_once_with(
         funding_source_id=mocked_funding_source.id,
         group_id=model_EligibilityType_supports_expiration.group_id,
-        expiry_date=mocked_session_enrollment_expiry.return_value,
+        expiry=mocked_session_enrollment_expiry.return_value,
     )
     assert response.status_code == 200
     assert response.template_name == TEMPLATE_SUCCESS