diff --git a/tests/e2e/pyproject.toml b/tests/e2e/pyproject.toml
index ca4f5f61..131e765e 100644
--- a/tests/e2e/pyproject.toml
+++ b/tests/e2e/pyproject.toml
@@ -13,6 +13,7 @@ dependencies = [
     "pytest-sugar>=1.0.0",
     "deepdiff>=8.0.1",
     "pytest-retry>=1.6.3",
+    "pytest-xdist>=3.5.0",
     "anthropic>=0.66.0",
     "openai>=1.0.0",
 ]
diff --git a/tests/e2e/run_model_alias_tests.sh b/tests/e2e/run_model_alias_tests.sh
index 7d2c161f..80ecf0c5 100755
--- a/tests/e2e/run_model_alias_tests.sh
+++ b/tests/e2e/run_model_alias_tests.sh
@@ -42,7 +42,7 @@ cd -
 
 # Run both test suites that share this config in a single pytest invocation
 log "running e2e tests for model alias routing + openai responses api"
-uv run pytest test_model_alias_routing.py test_openai_responses_api_client.py
+uv run pytest -n auto test_model_alias_routing.py test_openai_responses_api_client.py
 
 # Cleanup
 log "shutting down"