diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 4138d29f..4a070e9f 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -42,7 +42,7 @@ jobs:
           ulimit -n 1024
           export TZ=UTC
           uv sync --all-extras
-          uv run pytest --showlocals
+          uv run pytest --numprocesses auto
 
   minversions:
     name: minimum dependency versions
@@ -68,7 +68,7 @@ jobs:
           ulimit -n 1024
           export TZ=UTC
           uv sync --all-extras --resolution=lowest-direct
-          uv run pytest --showlocals
+          uv run pytest --numprocesses auto
 
   style:
     runs-on: ubuntu-latest
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 95bc7153..53f014f2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -41,7 +41,7 @@ coverage:
   script:
     - uv sync --all-extras
     - uv pip install coveralls pyyaml tomli
-    - uv run pytest --cov --cov-fail-under=100 --cov-report term:skip-covered -n auto
+    - uv run pytest --cov --cov-fail-under=100 --cov-report term:skip-covered --numprocesses auto
     - uv run coveralls
     - uv cache prune --ci
 
@@ -54,7 +54,7 @@ tests:
   stage: test
   script:
     - uv sync --all-extras
-    - uv run pytest
+    - uv run pytest --numprocesses auto
     - uv cache prune --ci
 
 minversions:
@@ -65,7 +65,7 @@ minversions:
   stage: test
   script:
     - uv sync --all-extras --resolution=lowest-direct
-    - uv run pytest
+    - uv run pytest --numprocesses auto
     - uv cache prune --ci
 
 doc: