diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ea7067d..16dd848 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -41,7 +41,10 @@ jobs:
 
     - name: Run tests
       run: |
-        make test
+        make test SLOW=true
+
+    - name: Upload coverage
+      run: |
         bash <(curl -s https://codecov.io/bash)
 
   typecheck:
diff --git a/.gitignore b/.gitignore
index a49b280..ac0ec1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -18,6 +18,9 @@ config.toml
 # data
 data
 personal
+*.csv
+*.json
+*.txt
 
 # generated
 *.html
@@ -32,5 +35,8 @@ htmlcov
 coverage.xml
 .coverage
 
+# profiling
+prof
+
 # macOS
 .DS_Store
diff --git a/Makefile b/Makefile
index 3310fc3..2069c58 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,10 @@ fmt:
 	poetry run black $(SRCDIRS)
 
 test:
-	poetry run python3 -m pytest -v tests/ --cov=quantifiedme --durations=5
+	poetry run python3 -m pytest -v tests/ --durations=5 $(if $(NOCAPTURE),--capture=no) \
+		--cov=quantifiedme --cov-report xml --cov-report term-missing \
+		$(if $(SLOW),,-m "not slow") \
+		$(if $(PROFILE),--profile-svg)
 
 typecheck:
 	poetry run mypy --ignore-missing-imports --check-untyped-defs $(SRCDIRS)
diff --git a/poetry.lock b/poetry.lock
index 921ac84..e972b39 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1113,6 +1113,17 @@ protobuf = ">=3.19.5,<3.20.0 || >3.20.0,<3.20.1 || >3.20.1,<4.21.1 || >4.21.1,<4
 [package.extras]
 grpc = ["grpcio (>=1.44.0,<2.0.0.dev0)"]
 
+[[package]]
+name = "gprof2dot"
+version = "2022.7.29"
+description = "Generate a dot graph from the output of several profilers."
+optional = false
+python-versions = ">=2.7"
+files = [
+    {file = "gprof2dot-2022.7.29-py2.py3-none-any.whl", hash = "sha256:f165b3851d3c52ee4915eb1bd6cca571e5759823c2cd0f71a79bda93c2dc85d6"},
+    {file = "gprof2dot-2022.7.29.tar.gz", hash = "sha256:45b4d298bd36608fccf9511c3fd88a773f7a1abc04d6cd39445b11ba43133ec5"},
+]
+
 [[package]]
 name = "htmlmin"
 version = "0.1.12"
@@ -3064,6 +3075,25 @@ docs = ["coverage", "ipypublish (>=0.10.7)", "ruamel.yaml", "ruamel.yaml.clib",
 flake8-plugins = ["flake8-builtins", "flake8-comprehensions", "flake8-docstrings", "import-order"]
 testing = ["beautifulsoup4 (==4.8.0)", "black (==19.3b0)", "coverage", "pytest-cov", "pytest-regressions"]
 
+[[package]]
+name = "pytest-profiling"
+version = "1.7.0"
+description = "Profiling plugin for py.test"
+optional = false
+python-versions = "*"
+files = [
+    {file = "pytest-profiling-1.7.0.tar.gz", hash = "sha256:93938f147662225d2b8bd5af89587b979652426a8a6ffd7e73ec4a23e24b7f29"},
+    {file = "pytest_profiling-1.7.0-py2.py3-none-any.whl", hash = "sha256:999cc9ac94f2e528e3f5d43465da277429984a1c237ae9818f8cfd0b06acb019"},
+]
+
+[package.dependencies]
+gprof2dot = "*"
+pytest = "*"
+six = "*"
+
+[package.extras]
+tests = ["pytest-virtualenv"]
+
 [[package]]
 name = "pytest-xdist"
 version = "3.3.1"
@@ -4298,4 +4328,4 @@ files = [
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10, <3.12"
-content-hash = "e0baf3a107d66fd6da067e227e2bf77cfe55968b4528263fd7ed479512e3cf78"
+content-hash = "99a17b17295f7c6adcd0a1b98e38c4aca1d3070dc349fbb1c6305955ad363806"
diff --git a/pyproject.toml b/pyproject.toml
index 6ec3876..df2a10e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -43,13 +43,14 @@ ipykernel = "*"
 pytest = "*"
 pytest-cov = "*"
 pytest-xdist = "*"
+pytest-profiling = "*"
 pytest_notebook = "*"
 flake8 = "*"
 mypy = "*"
 black = "*"
 ipympl = "*"
 pyupgrade = "*"
-ruff = "^0.1.4"
+ruff = "*"
 
 [tool.pytest.ini_options]
 minversion = "6.0"