diff --git a/app/methods/lookup_methods.py b/app/methods/lookup_methods.py
index 35a5488..5db0cd8 100644
--- a/app/methods/lookup_methods.py
+++ b/app/methods/lookup_methods.py
@@ -28,8 +28,8 @@ def get_lookup_list_v3(
         SELECT * FROM (
             SELECT *, 
                    ROW_NUMBER() OVER (
-                       PARTITION BY `group`
-                       ORDER BY 
+                       PARTITION BY `name`
+                       ORDER BY
                           (for_type = :for_type AND for_id = :for_id) DESC,
                           (account_id = :account_id) DESC, 
                           created_on DESC
diff --git a/tests/e2e/test_e2e_v3_lookup.py b/tests/e2e/test_e2e_v3_lookup.py
index 7be1bd1..d2dfd27 100644
--- a/tests/e2e/test_e2e_v3_lookup.py
+++ b/tests/e2e/test_e2e_v3_lookup.py
@@ -75,13 +75,35 @@ def test_lookup_resolve(lu_type, query):
         print_result(f"GET /{lu_type}/resolve?q={query}", False, str(e))
         return False
 
+US_TIMEZONES = [
+    "US/Alaska", "US/Arizona", "US/Central", "US/East-Indiana",
+    "US/Eastern", "US/Hawaii", "US/Indiana-Starke", "US/Michigan",
+    "US/Mountain", "US/Pacific", "US/Pacific-New", "US/Samoa",
+]
+
+def test_timezone_us_dedup():
+    """Regression: PARTITION BY `name` fix — all 12 US/* zones must appear."""
+    label = "time_zone US/* deduplication (regression)"
+    data = test_lookup_list("time_zone")
+    if data is None:
+        return
+    names = {item.get("name") for item in data}
+    missing = [tz for tz in US_TIMEZONES if tz not in names]
+    if missing:
+        print_result(label, False, f"Missing: {missing}")
+    else:
+        print_result(label, True, f"All 12 US/* timezones present ({len(data)} total)")
+
 if __name__ == "__main__":
     print(f"🚀 Starting V3 Lookup E2E Suite ({BASE_URL})\n")
     start_suite = time.time()
-    
+
     # 1. Basic Lists (Phase 1)
     test_lookup_list("country")
-    
+
+    print("\n--- Regression: US/* timezone deduplication ---")
+    test_timezone_us_dedup()
+
     print("\n--- Testing Priority Only ---")
     test_lookup_list("time_zone", only_priority=True)