diff --git a/src/nba_api/stats/library/data.py b/src/nba_api/stats/library/data.py
index 91f674cf..15b891a7 100644
--- a/src/nba_api/stats/library/data.py
+++ b/src/nba_api/stats/library/data.py
@@ -6660,4 +6660,24 @@
         "California",
         [],
     ],
+    [
+        1611661327,
+        "POR",
+        "Fire",
+        2026,
+        "Portland",
+        "Portland Fire",
+        "Oregon",
+        [],
+    ],
+    [
+        1611661332,
+        "TOR",
+        "Tempo",
+        2026,
+        "Toronto",
+        "Toronto Tempo",
+        "Ontario",
+        [],
+    ],
 ]
diff --git a/tests/unit/stats/static/test_static_data.py b/tests/unit/stats/static/test_static_data.py
index 91689474..e8e01b46 100644
--- a/tests/unit/stats/static/test_static_data.py
+++ b/tests/unit/stats/static/test_static_data.py
@@ -6,4 +6,31 @@ def test_nba_teams():
 
 
 def test_wnba_teams():
-    assert len(teams.wnba_teams) == 13
+    assert len(teams.wnba_teams) == 15
+
+
+def test_wnba_2026_expansion_teams_present():
+    """Toronto Tempo and Portland Fire joined the WNBA as expansion franchises
+    for the 2026 season. Regression guard for https://github.com/swar/nba_api/issues/666."""
+    tempo = teams.find_wnba_team_by_abbreviation("TOR")
+    assert tempo is not None
+    assert tempo["id"] == 1611661332
+    assert tempo["full_name"] == "Toronto Tempo"
+    assert tempo["nickname"] == "Tempo"
+    assert tempo["city"] == "Toronto"
+    assert tempo["state"] == "Ontario"
+    assert tempo["year_founded"] == 2026
+
+    fire = teams.find_wnba_team_by_abbreviation("POR")
+    assert fire is not None
+    assert fire["id"] == 1611661327
+    assert fire["full_name"] == "Portland Fire"
+    assert fire["nickname"] == "Fire"
+    assert fire["city"] == "Portland"
+    assert fire["state"] == "Oregon"
+    assert fire["year_founded"] == 2026
+
+    # Inverse lookup: catches the case where the abbreviation index
+    # resolves but the id-keyed lookup falls out of sync.
+    assert teams.find_wnba_team_name_by_id(1611661332)["full_name"] == "Toronto Tempo"
+    assert teams.find_wnba_team_name_by_id(1611661327)["full_name"] == "Portland Fire"