diff --git a/Makefile b/Makefile
index ac76f72..2c580d6 100644
--- a/Makefile
+++ b/Makefile
@@ -4,10 +4,10 @@ UV ?= uv
 UV_PYTHON ?=
 PACKAGE ?=
 COVERAGE_FAIL_UNDER ?= 80
-TEST_WORKERS ?= 0
+TEST_ARGS ?=
 RUN = $(if $(UV_PYTHON),UV_PYTHON=$(UV_PYTHON)) $(UV) run
 
-.PHONY: all help install install-all install-dev install-test install-docs check verify diff-check lint format-check format fix type-check test test-serial test-parallel coverage build package-check package-verify docs docs-check linkcheck build-docs serve-docs hooks clean
+.PHONY: all help install install-all install-dev install-test install-test-extras install-docs check verify diff-check lint format-check format fix type-check test test-serial test-parallel coverage build package-check package-verify docs docs-check linkcheck build-docs serve-docs hooks clean
 
 help: ## Show available commands
 	@awk 'BEGIN {FS = ":.*## "}; /^[a-zA-Z0-9_-]+:.*## / {printf "%-18s %s\n", $$1, $$2}' $(MAKEFILE_LIST)
@@ -23,6 +23,9 @@ install-dev: ## Install dependencies for static checks
 install-test: ## Install dependencies for tests
 	$(UV) sync --group test --locked $(if $(UV_PYTHON),--python $(UV_PYTHON))
 
+install-test-extras: ## Install optional test utilities
+	$(UV) sync --group test --group test-extras --locked $(if $(UV_PYTHON),--python $(UV_PYTHON))
+
 install-docs: ## Install dependencies for documentation
 	$(UV) sync --group docs --locked
 
@@ -51,18 +54,17 @@ fix: ## Apply Ruff lint fixes and formatting
 type-check: ## Check static types with ty
 	$(RUN) ty check
 
-test: ## Run tests
-	$(RUN) pytest -n $(TEST_WORKERS) -sv
+test: ## Run tests serially
+	$(RUN) pytest $(TEST_ARGS)
 
-test-serial: TEST_WORKERS = 0
 test-serial: test ## Run tests without parallel workers
 
-test-parallel: TEST_WORKERS = auto
-test-parallel: test ## Run independent tests with parallel workers
+test-parallel: ## Run independent tests with parallel workers
+	$(RUN) pytest -n auto $(TEST_ARGS)
 
 coverage: ## Enforce coverage for PACKAGE
 	@test -n "$(PACKAGE)" || { echo "Set PACKAGE to the library import name."; exit 2; }
-	$(RUN) pytest -n $(TEST_WORKERS) --cov="$(PACKAGE)" --cov-branch --cov-report=term-missing:skip-covered --cov-fail-under="$(COVERAGE_FAIL_UNDER)" -sv
+	$(RUN) pytest $(TEST_ARGS) --cov="$(PACKAGE)" --cov-branch --cov-report=term-missing:skip-covered --cov-fail-under="$(COVERAGE_FAIL_UNDER)"
 
 build: ## Build source and wheel distributions
 	$(UV) build --sdist --wheel
diff --git a/pyproject.toml b/pyproject.toml
index 81e8ea1..30224a1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,17 +36,19 @@ dev = ["pre-commit", "ruff", "setuptools-scm", "ty", "vulture"]
 test = [
     "pytest",
     "pytest-cov",
+    "pytest-timeout",
+    "pytest-xdist",
+]
+test-extras = [
+    "freezegun",
+    "hypothesis",
     "pytest-env",
     "pytest-ordering",
     "pytest-randomly",
     "pytest-rerunfailures",
     "pytest-runner",
     "pytest-sugar",
-    "pytest-timeout",
     "pytest-vcr",
-    "pytest-xdist",
-    "freezegun",
-    "hypothesis",
 ]
 docs = [
     "sphinx",
@@ -135,10 +137,16 @@ ignore = [
 docstring-code-format = true
 
 [tool.pytest.ini_options]
-addopts = ["--strict-config", "--strict-markers", "--durations=10"]
+addopts = [
+    "--strict-config",
+    "--strict-markers",
+    "--durations=10",
+    "--durations-min=1.0",
+]
 testpaths = ["tests"]
 python_files = "test_*.py"
 timeout = 60
+xfail_strict = true
 markers = [
     "unit: Unit tests",
     "component: Component tests",
diff --git a/tests/test_example.py b/tests/test_example.py
index 0ce71bc..1fdb79d 100644
--- a/tests/test_example.py
+++ b/tests/test_example.py
@@ -1,6 +1,9 @@
 """Test the example module."""
 
+import pytest
 
-def test_example(tmpdir):
+
+@pytest.mark.unit
+def test_example():
     """Test some simple math."""
     assert 2 + 2 == 4
diff --git a/uv.lock b/uv.lock
index 8a63cce..b451bf7 100644
--- a/uv.lock
+++ b/uv.lock
@@ -3345,19 +3345,21 @@ notebooks = [
     { name = "xlrd" },
 ]
 test = [
-    { name = "freezegun" },
-    { name = "hypothesis" },
     { name = "pytest" },
     { name = "pytest-cov" },
+    { name = "pytest-timeout" },
+    { name = "pytest-xdist" },
+]
+test-extras = [
+    { name = "freezegun" },
+    { name = "hypothesis" },
     { name = "pytest-env" },
     { name = "pytest-ordering" },
     { name = "pytest-randomly" },
     { name = "pytest-rerunfailures" },
     { name = "pytest-runner" },
     { name = "pytest-sugar" },
-    { name = "pytest-timeout" },
     { name = "pytest-vcr" },
-    { name = "pytest-xdist" },
 ]
 
 [package.metadata]
@@ -3389,17 +3391,19 @@ notebooks = [
     { name = "xlrd" },
 ]
 test = [
-    { name = "freezegun" },
-    { name = "hypothesis" },
     { name = "pytest" },
     { name = "pytest-cov" },
+    { name = "pytest-timeout" },
+    { name = "pytest-xdist" },
+]
+test-extras = [
+    { name = "freezegun" },
+    { name = "hypothesis" },
     { name = "pytest-env" },
     { name = "pytest-ordering" },
     { name = "pytest-randomly" },
     { name = "pytest-rerunfailures" },
     { name = "pytest-runner" },
     { name = "pytest-sugar" },
-    { name = "pytest-timeout" },
     { name = "pytest-vcr" },
-    { name = "pytest-xdist" },
 ]