diff --git a/.github/workflows/shuffle-tests.yml b/.github/workflows/shuffle-tests.yml
index a4334dc56da37e..df3a4759a5a291 100644
--- a/.github/workflows/shuffle-tests.yml
+++ b/.github/workflows/shuffle-tests.yml
@@ -40,12 +40,13 @@ jobs:
       fail-fast: false
       matrix:
         # XXX: When updating this, make sure you also update MATRIX_INSTANCE_TOTAL.
-        instance: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+        instance:
+          [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21]
 
     env:
       # XXX: `MATRIX_INSTANCE_TOTAL` must be hardcoded to the length of `strategy.matrix.instance`.
       # If this increases, make sure to also increase `flags.backend.after_n_builds` in `codecov.yml`.
-      MATRIX_INSTANCE_TOTAL: 11
+      MATRIX_INSTANCE_TOTAL: 22
 
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
diff --git a/tests/sentry/models/test_team.py b/tests/sentry/models/test_team.py
index 001a72d5230eff..4e325056a49e9d 100644
--- a/tests/sentry/models/test_team.py
+++ b/tests/sentry/models/test_team.py
@@ -1,3 +1,4 @@
+from django.db import connection
 from django.test import override_settings
 
 from sentry.deletions.tasks.hybrid_cloud import schedule_hybrid_cloud_foreign_key_jobs_control
@@ -60,8 +61,21 @@ def test_get_projects(self) -> None:
     def test_without_snowflake(self) -> None:
         user = self.create_user()
         org = self.create_organization(owner=user)
+
+        with connection.cursor() as cursor:
+            cursor.execute("SELECT last_value FROM sentry_team_id_seq")
+            id_before = cursor.fetchone()[0]
+
         team = self.create_team(organization=org)
-        assert team.id < 1_000_000_000
+
+        with connection.cursor() as cursor:
+            cursor.execute("SELECT last_value FROM sentry_team_id_seq")
+            id_after = cursor.fetchone()[0]
+
+        # When snowflake is disabled, the ID should advance by exactly 1
+        # (Tests that we used regular auto-increment, not snowflake generation)
+        assert id_after == id_before + 1
+        assert team.id == id_after
         assert Team.objects.filter(id=team.id).exists()