diff --git a/dbt-tests-adapter/dbt/tests/adapter/utils/fixture_date_spine.py b/dbt-tests-adapter/dbt/tests/adapter/utils/fixture_date_spine.py
index de01c865..57553db3 100644
--- a/dbt-tests-adapter/dbt/tests/adapter/utils/fixture_date_spine.py
+++ b/dbt-tests-adapter/dbt/tests/adapter/utils/fixture_date_spine.py
@@ -3,29 +3,17 @@
 models__test_date_spine_sql = """
 with generated_dates as (
     {% if target.type == 'postgres' %}
-        {{ date_spine("day", "'2023-09-01'::date", "'2023-09-10'::date") }}
+        {{ date_spine("day", "'2023-09-07'::date", "'2023-09-10'::date") }}
 
     {% elif target.type == 'bigquery' or target.type == 'redshift' %}
         select cast(date_day as date) as date_day
-        from ({{ date_spine("day", "'2023-09-01'", "'2023-09-10'") }})
+        from ({{ date_spine("day", "'2023-09-07'", "'2023-09-10'") }})
 
     {% else %}
-        {{ date_spine("day", "'2023-09-01'", "'2023-09-10'") }}
+        {{ date_spine("day", "'2023-09-07'", "'2023-09-10'") }}
     {% endif %}
 ), expected_dates as (
     {% if target.type == 'postgres' %}
-        select '2023-09-01'::date as expected
-        union all
-        select '2023-09-02'::date as expected
-        union all
-        select '2023-09-03'::date as expected
-        union all
-        select '2023-09-04'::date as expected
-        union all
-        select '2023-09-05'::date as expected
-        union all
-        select '2023-09-06'::date as expected
-        union all
         select '2023-09-07'::date as expected
         union all
         select '2023-09-08'::date as expected
@@ -33,18 +21,6 @@
         select '2023-09-09'::date as expected
 
     {% elif target.type == 'bigquery' or target.type == 'redshift' %}
-        select cast('2023-09-01' as date) as expected
-        union all
-        select cast('2023-09-02' as date) as expected
-        union all
-        select cast('2023-09-03' as date) as expected
-        union all
-        select cast('2023-09-04' as date) as expected
-        union all
-        select cast('2023-09-05' as date) as expected
-        union all
-        select cast('2023-09-06' as date) as expected
-        union all
         select cast('2023-09-07' as date) as expected
         union all
         select cast('2023-09-08' as date) as expected
@@ -52,18 +28,6 @@
         select cast('2023-09-09' as date) as expected
 
     {% else %}
-        select '2023-09-01' as expected
-        union all
-        select '2023-09-02' as expected
-        union all
-        select '2023-09-03' as expected
-        union all
-        select '2023-09-04' as expected
-        union all
-        select '2023-09-05' as expected
-        union all
-        select '2023-09-06' as expected
-        union all
         select '2023-09-07' as expected
         union all
         select '2023-09-08' as expected
@@ -75,7 +39,7 @@
         generated_dates.date_day,
         expected_dates.expected
     from generated_dates
-    left join expected_dates on generated_dates.date_day = expected_dates.expected
+    full outer join expected_dates on generated_dates.date_day = expected_dates.expected
 )
 
 SELECT * from joined