[Bug] dbt build : run tests on selected model with tags

[seuf]

Is this a new bug in dbt-core?

• I believe this is a new bug in dbt-core
• I have searched the existing issues, and I could not find an existing issue for this bug

Current Behavior

Hi,

I would like to build a dbt model + tests according to the tags I have defined for each tests

For example I have a model:

version: 2

models:
  - name: orders
    config:
      tags:
        - staging
        - production
    columns:
      - name: order_id
        tests:
          - unique:
              tags:
                - production
      - name: customer_id
        tests:
          - not_null:
              tags:
                - staging
                - production

Here I want to run the model + the test "not_null" on the column "customer_id" only when I run the model on the target "staging"

But it seems that tags are herited from the model.

When I run the following command, it runs the model + all the tests (not only the ones with the tag "staging")

dbt build --target staging --select 'orders,tag:staging'
13:16:07  Running with dbt=1.9.0
13:16:09  Registered adapter: bigquery=1.9.0
13:16:17  Found 956 models, 2133 data tests, 797 sources, 186 exposures, 870 macros
13:16:18  
13:16:18  Concurrency: 4 threads (target='staging')
13:16:18  
13:16:20  1 of 4 START sql table model bigquery-project-redacted.dbt.orders  [RUN]
13:16:30  1 of 4 OK created sql table model bigquery-project-redacted.dbt.orders  [CREATE TABLE (8.0 rows, 1.4 GiB processed) in 10.54s]
13:16:30  3 of 4 START test not_null_orders_customer_id . [RUN]
13:16:30  4 of 4 START test unique_orders_order_id ...... [RUN]
13:16:31  3 of 4 PASS not_null_orders_customer_id ....... [PASS in 1.07s]
13:16:31  4 of 4 PASS unique_orders_order_id ............ [PASS in 1.16s]
13:16:31  
13:16:31  Finished running 1 table model, 3 data tests in 0 hours 0 minutes and 13.72 seconds (13.72s).
13:16:31  
13:16:31  Completed with 1 error, 0 partial successes, and 0 warnings:

The test unique_orders_order_id is executed event it don't have the staging tag.

Is there a way to run only the tests with the selected tags on s selected model ?

If I run dbt build -t staging --select "orders tags:staging" it will execute eveything that have the tag staging.

If I remove the tags on on model config, nothing is executed.

Thanks

Expected Behavior

Only the tests having the selected tag:staging are executed.

Steps To Reproduce

Create a model with 2 tags, and tests with only one tag like in the description ⬆

Relevant log output

Environment

- OS: Ubuntu 24.04
- Python: 3.11
- dbt: 1.9.0

Which database adapter are you using with dbt?

bigquery

Additional Context

No response