diff --git a/.github/workflows/ci_test.yml b/.github/workflows/ci_test.yml
index fded80e..db63ba6 100644
--- a/.github/workflows/ci_test.yml
+++ b/.github/workflows/ci_test.yml
@@ -8,7 +8,14 @@ on:
       - master
   pull_request:
 jobs:
+  wip:
+    if: ${{ !contains(github.event.pull_request.title, 'WIP') }}
+    name: Check for WIP
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
   black-test:
+    if: ${{ !contains(github.event.pull_request.title, 'WIP') }}
     name: Black Python code format
     runs-on: ubuntu-latest
     steps:
@@ -24,6 +31,7 @@ jobs:
       - name: Ensure contributor used ("black ./") before commit
         run: black --check .
   test:
+    if: ${{ !contains(github.event.pull_request.title, 'WIP') }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -39,17 +47,20 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Install Poetry
-        uses: dschep/install-poetry-action@v1.2
+        uses: snok/install-poetry@v1.1.1
         with:
           version: 1.1.4
 
       - name: Install Dependencies
         run: |
-          poetry export --without-hashes --dev -f requirements.txt > requirements.txt
-          pip install -r requirements.txt
+          poetry config virtualenvs.create false
+          poetry install
 
       - name: Run Tests
-        run: bash scripts/get-coverage.sh
+        run: |
+          coverage run --concurrency=multiprocessing -m pytest --hypothesis-profile=pypeln
+          coverage combine
+          coverage xml --omit '.venv/*' --omit '*_test.py'
 
       - name: Upload coverage
         uses: codecov/codecov-action@v1
\ No newline at end of file
diff --git a/benchmarks/100_million_downloads/client-pypeln-idiomatic.py b/benchmarks/100_million_downloads/client-pypeln-idiomatic.py
index a395e8a..6f3b088 100644
--- a/benchmarks/100_million_downloads/client-pypeln-idiomatic.py
+++ b/benchmarks/100_million_downloads/client-pypeln-idiomatic.py
@@ -19,7 +19,9 @@ async def fetch(url):
                 return await response.read()
 
         await pl.task.each(
-            fetch, urls, workers=limit,
+            fetch,
+            urls,
+            workers=limit,
         )
 
 
diff --git a/conftest.py b/conftest.py
new file mode 100644
index 0000000..fd40cc5
--- /dev/null
+++ b/conftest.py
@@ -0,0 +1,3 @@
+from hypothesis import settings
+
+settings.register_profile("pypeln", deadline=1000)
diff --git a/poetry.lock b/poetry.lock
index c1f94bd..294330a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,18 +1,18 @@
 [[package]]
 name = "aiohttp"
-version = "3.6.2"
+version = "3.7.3"
 description = "Async http client/server framework (asyncio)"
 category = "dev"
 optional = false
-python-versions = ">=3.5.3"
+python-versions = ">=3.6"
 
 [package.dependencies]
 async-timeout = ">=3.0,<4.0"
 attrs = ">=17.3.0"
 chardet = ">=2.0,<4.0"
 idna-ssl = {version = ">=1.0", markers = "python_version < \"3.7\""}
-multidict = ">=4.5,<5.0"
-typing-extensions = {version = ">=3.6.5", markers = "python_version < \"3.7\""}
+multidict = ">=4.5,<7.0"
+typing-extensions = ">=3.6.5"
 yarl = ">=1.0,<2.0"
 
 [package.extras]
@@ -44,31 +44,28 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "19.3.0"
+version = "20.3.0"
 description = "Classes Without Boilerplate"
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.extras]
-azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
-dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
-docs = ["sphinx", "zope.interface"]
-tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
 
 [[package]]
 name = "beautifulsoup4"
-version = "4.9.1"
+version = "4.9.3"
 description = "Screen-scraping library"
 category = "dev"
 optional = false
 python-versions = "*"
 
 [package.dependencies]
-soupsieve = [
-    ">1.2",
-    "<2.0",
-]
+soupsieve = {version = ">1.2", markers = "python_version >= \"3.0\""}
 
 [package.extras]
 html5lib = ["html5lib"]
@@ -76,7 +73,7 @@ lxml = ["lxml"]
 
 [[package]]
 name = "black"
-version = "19.10b0"
+version = "20.8b1"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
@@ -84,14 +81,17 @@ python-versions = ">=3.6"
 
 [package.dependencies]
 appdirs = "*"
-attrs = ">=18.1.0"
-click = ">=6.5"
+click = ">=7.1.2"
+dataclasses = {version = ">=0.6", markers = "python_version < \"3.7\""}
+mypy-extensions = ">=0.4.3"
 pathspec = ">=0.6,<1"
-regex = "*"
-toml = ">=0.9.4"
+regex = ">=2020.1.8"
+toml = ">=0.10.1"
 typed-ast = ">=1.4.0"
+typing-extensions = ">=3.7.4"
 
 [package.extras]
+colorama = ["colorama (>=0.4.3)"]
 d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
@@ -112,7 +112,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "colorama"
-version = "0.4.3"
+version = "0.4.4"
 description = "Cross-platform colored terminal text."
 category = "main"
 optional = false
@@ -120,7 +120,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "coverage"
-version = "5.1"
+version = "5.3.1"
 description = "Code coverage measurement for Python"
 category = "main"
 optional = false
@@ -153,7 +153,7 @@ python-versions = ">=3.6, <3.7"
 
 [[package]]
 name = "debugpy"
-version = "1.0.0rc2"
+version = "1.2.1"
 description = "An implementation of the Debug Adapter Protocol for Python"
 category = "dev"
 optional = false
@@ -169,34 +169,38 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "hypothesis"
-version = "5.18.0"
+version = "5.43.5"
 description = "A library for property-based testing"
 category = "dev"
 optional = false
-python-versions = ">=3.5.2"
+python-versions = ">=3.6"
 
 [package.dependencies]
 attrs = ">=19.2.0"
 sortedcontainers = ">=2.1.0,<3.0.0"
 
 [package.extras]
-all = ["django (>=2.2)", "dpcontracts (>=0.4)", "lark-parser (>=0.6.5)", "numpy (>=1.9.0)", "pandas (>=0.19)", "pytest (>=4.3)", "python-dateutil (>=1.4)", "pytz (>=2014.1)"]
+all = ["black (>=19.10b0)", "click (>=7.0)", "django (>=2.2)", "dpcontracts (>=0.4)", "lark-parser (>=0.6.5)", "numpy (>=1.9.0)", "pandas (>=0.25)", "pytest (>=4.3)", "python-dateutil (>=1.4)", "pytz (>=2014.1)", "redis (>=3.0.0)", "importlib-resources (>=3.3.0)", "importlib-metadata", "backports.zoneinfo (>=0.2.1)", "tzdata (>=2020.4)"]
+cli = ["click (>=7.0)", "black (>=19.10b0)"]
 dateutil = ["python-dateutil (>=1.4)"]
 django = ["pytz (>=2014.1)", "django (>=2.2)"]
 dpcontracts = ["dpcontracts (>=0.4)"]
+ghostwriter = ["black (>=19.10b0)"]
 lark = ["lark-parser (>=0.6.5)"]
 numpy = ["numpy (>=1.9.0)"]
-pandas = ["pandas (>=0.19)"]
+pandas = ["pandas (>=0.25)"]
 pytest = ["pytest (>=4.3)"]
 pytz = ["pytz (>=2014.1)"]
+redis = ["redis (>=3.0.0)"]
+zoneinfo = ["importlib-resources (>=3.3.0)", "backports.zoneinfo (>=0.2.1)", "tzdata (>=2020.4)"]
 
 [[package]]
 name = "idna"
-version = "2.9"
+version = "3.0"
 description = "Internationalized Domain Names in Applications (IDNA)"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.4"
 
 [[package]]
 name = "idna-ssl"
@@ -211,18 +215,19 @@ idna = ">=2.0"
 
 [[package]]
 name = "importlib-metadata"
-version = "1.6.1"
+version = "3.3.0"
 description = "Read metadata from Python packages"
 category = "main"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+python-versions = ">=3.6"
 
 [package.dependencies]
+typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
 zipp = ">=0.5"
 
 [package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
+docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
 
 [[package]]
 name = "jinja2"
@@ -240,15 +245,15 @@ i18n = ["Babel (>=0.8)"]
 
 [[package]]
 name = "joblib"
-version = "0.15.1"
-description = "Lightweight pipelining: using Python functions as pipeline jobs."
+version = "1.0.0"
+description = "Lightweight pipelining with Python functions"
 category = "dev"
 optional = false
 python-versions = ">=3.6"
 
 [[package]]
 name = "livereload"
-version = "2.6.2"
+version = "2.6.3"
 description = "Python LiveReload is an awesome tool for web developers"
 category = "dev"
 optional = false
@@ -276,11 +281,11 @@ languages = ["nltk (>=3.2.5,<3.5)", "nltk (>=3.2.5)"]
 
 [[package]]
 name = "markdown"
-version = "3.2.2"
+version = "3.3.3"
 description = "Python implementation of Markdown."
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
 
 [package.dependencies]
 importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
@@ -337,7 +342,7 @@ pymdown-extensions = ">=6.3"
 
 [[package]]
 name = "mkdocstrings"
-version = "0.12.0"
+version = "0.12.2"
 description = "Automatic documentation from sources, for MkDocs."
 category = "dev"
 optional = false
@@ -347,11 +352,11 @@ python-versions = ">=3.6,<4.0"
 beautifulsoup4 = ">=4.8.2,<5.0.0"
 mkdocs = ">=1.1,<2.0"
 pymdown-extensions = ">=6.3,<8.0"
-pytkdocs = ">=0.2.0,<0.7.0"
+pytkdocs = ">=0.2.0,<0.8.0"
 
 [[package]]
 name = "more-itertools"
-version = "8.4.0"
+version = "8.6.0"
 description = "More routines for operating on iterables, beyond itertools"
 category = "main"
 optional = false
@@ -359,11 +364,19 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "multidict"
-version = "4.7.6"
+version = "5.1.0"
 description = "multidict implementation"
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
+
+[[package]]
+name = "mypy-extensions"
+version = "0.4.3"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+category = "dev"
+optional = false
+python-versions = "*"
 
 [[package]]
 name = "nltk"
@@ -389,7 +402,7 @@ twitter = ["twython"]
 
 [[package]]
 name = "packaging"
-version = "20.4"
+version = "20.8"
 description = "Core utilities for Python packages"
 category = "main"
 optional = false
@@ -397,11 +410,10 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
-six = "*"
 
 [[package]]
 name = "pathspec"
-version = "0.8.0"
+version = "0.8.1"
 description = "Utility library for gitignore style pattern matching of file paths."
 category = "dev"
 optional = false
@@ -423,7 +435,7 @@ dev = ["pre-commit", "tox"]
 
 [[package]]
 name = "py"
-version = "1.8.2"
+version = "1.10.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 category = "main"
 optional = false
@@ -431,7 +443,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pygments"
-version = "2.6.1"
+version = "2.7.3"
 description = "Pygments is a syntax highlighting package written in Python."
 category = "dev"
 optional = false
@@ -510,7 +522,7 @@ testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "pytest-xdist",
 
 [[package]]
 name = "pytest-sugar"
-version = "0.9.3"
+version = "0.9.4"
 description = "pytest-sugar is a plugin for pytest that changes the default look and feel of pytest (e.g. progressbar, show tests that fail instantly)."
 category = "dev"
 optional = false
@@ -523,7 +535,7 @@ termcolor = ">=1.1.0"
 
 [[package]]
 name = "pytkdocs"
-version = "0.6.0"
+version = "0.7.0"
 description = "Load Python objects documentation."
 category = "dev"
 optional = false
@@ -539,7 +551,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "regex"
-version = "2020.6.8"
+version = "2020.11.13"
 description = "Alternative regular expression module, to replace re."
 category = "dev"
 optional = false
@@ -549,13 +561,13 @@ python-versions = "*"
 name = "six"
 version = "1.15.0"
 description = "Python 2 and 3 compatibility utilities"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "sortedcontainers"
-version = "2.2.2"
+version = "2.3.0"
 description = "Sorted Containers -- Sorted List, Sorted Dict, Sorted Set"
 category = "dev"
 optional = false
@@ -563,11 +575,11 @@ python-versions = "*"
 
 [[package]]
 name = "soupsieve"
-version = "1.9.6"
+version = "2.1"
 description = "A modern CSS selector implementation for Beautiful Soup."
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=3.5"
 
 [[package]]
 name = "stopit"
@@ -587,23 +599,23 @@ python-versions = "*"
 
 [[package]]
 name = "toml"
-version = "0.10.1"
+version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "toolz"
-version = "0.10.0"
+version = "0.11.1"
 description = "List processing tools and functional utilities"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.5"
 
 [[package]]
 name = "tornado"
-version = "6.0.4"
+version = "6.1"
 description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
 category = "dev"
 optional = false
@@ -611,18 +623,19 @@ python-versions = ">= 3.5"
 
 [[package]]
 name = "tqdm"
-version = "4.46.1"
+version = "4.55.0"
 description = "Fast, Extensible Progress Meter"
 category = "dev"
 optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
 
 [package.extras]
-dev = ["py-make (>=0.1.0)", "twine", "argopt", "pydoc-markdown"]
+dev = ["py-make (>=0.1.0)", "twine", "wheel"]
+telegram = ["requests"]
 
 [[package]]
 name = "typed-ast"
-version = "1.4.1"
+version = "1.4.2"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
 category = "dev"
 optional = false
@@ -630,7 +643,7 @@ python-versions = "*"
 
 [[package]]
 name = "typing-extensions"
-version = "3.7.4.2"
+version = "3.7.4.3"
 description = "Backported and Experimental Type Hints for Python 3.5+"
 category = "main"
 optional = false
@@ -638,7 +651,7 @@ python-versions = "*"
 
 [[package]]
 name = "wcwidth"
-version = "0.2.4"
+version = "0.2.5"
 description = "Measures the displayed width of unicode strings in a terminal"
 category = "main"
 optional = false
@@ -646,19 +659,20 @@ python-versions = "*"
 
 [[package]]
 name = "yarl"
-version = "1.4.2"
+version = "1.6.3"
 description = "Yet another URL library"
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
 
 [package.dependencies]
 idna = ">=2.0"
 multidict = ">=4.0"
+typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
 [[package]]
 name = "zipp"
-version = "3.1.0"
+version = "3.4.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "main"
 optional = false
@@ -666,27 +680,52 @@ python-versions = ">=3.6"
 
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["jaraco.itertools", "func-timeout"]
+testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6"
-content-hash = "e206041fb1695d0844ce68a94ed0f8cf7d67ebcce1bea4cc16e33365ac0eb0b7"
+content-hash = "73f68fc0c087745b5c1e01a19fdb2bb9682ec327027e1eb09895647345d56d0c"
 
 [metadata.files]
 aiohttp = [
-    {file = "aiohttp-3.6.2-cp35-cp35m-macosx_10_13_x86_64.whl", hash = "sha256:1e984191d1ec186881ffaed4581092ba04f7c61582a177b187d3a2f07ed9719e"},
-    {file = "aiohttp-3.6.2-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:50aaad128e6ac62e7bf7bd1f0c0a24bc968a0c0590a726d5a955af193544bcec"},
-    {file = "aiohttp-3.6.2-cp36-cp36m-macosx_10_13_x86_64.whl", hash = "sha256:65f31b622af739a802ca6fd1a3076fd0ae523f8485c52924a89561ba10c49b48"},
-    {file = "aiohttp-3.6.2-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:ae55bac364c405caa23a4f2d6cfecc6a0daada500274ffca4a9230e7129eac59"},
-    {file = "aiohttp-3.6.2-cp36-cp36m-win32.whl", hash = "sha256:344c780466b73095a72c616fac5ea9c4665add7fc129f285fbdbca3cccf4612a"},
-    {file = "aiohttp-3.6.2-cp36-cp36m-win_amd64.whl", hash = "sha256:4c6efd824d44ae697814a2a85604d8e992b875462c6655da161ff18fd4f29f17"},
-    {file = "aiohttp-3.6.2-cp37-cp37m-macosx_10_13_x86_64.whl", hash = "sha256:2f4d1a4fdce595c947162333353d4a44952a724fba9ca3205a3df99a33d1307a"},
-    {file = "aiohttp-3.6.2-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:6206a135d072f88da3e71cc501c59d5abffa9d0bb43269a6dcd28d66bfafdbdd"},
-    {file = "aiohttp-3.6.2-cp37-cp37m-win32.whl", hash = "sha256:b778ce0c909a2653741cb4b1ac7015b5c130ab9c897611df43ae6a58523cb965"},
-    {file = "aiohttp-3.6.2-cp37-cp37m-win_amd64.whl", hash = "sha256:32e5f3b7e511aa850829fbe5aa32eb455e5534eaa4b1ce93231d00e2f76e5654"},
-    {file = "aiohttp-3.6.2-py3-none-any.whl", hash = "sha256:460bd4237d2dbecc3b5ed57e122992f60188afe46e7319116da5eb8a9dfedba4"},
-    {file = "aiohttp-3.6.2.tar.gz", hash = "sha256:259ab809ff0727d0e834ac5e8a283dc5e3e0ecc30c4d80b3cd17a4139ce1f326"},
+    {file = "aiohttp-3.7.3-cp36-cp36m-macosx_10_14_x86_64.whl", hash = "sha256:328b552513d4f95b0a2eea4c8573e112866107227661834652a8984766aa7656"},
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+    {file = "yarl-1.6.3.tar.gz", hash = "sha256:8a9066529240171b68893d60dca86a763eae2139dd42f42106b03cf4b426bf10"},
 ]
 zipp = [
-    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
-    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
+    {file = "zipp-3.4.0-py3-none-any.whl", hash = "sha256:102c24ef8f171fd729d46599845e95c7ab894a4cf45f5de11a44cc7444fb1108"},
+    {file = "zipp-3.4.0.tar.gz", hash = "sha256:ed5eee1974372595f9e416cc7bbeeb12335201d8081ca8a0743c954d4446e5cb"},
 ]
diff --git a/pypeln/process/api/each.py b/pypeln/process/api/each.py
index 251f334..a6ddc0e 100644
--- a/pypeln/process/api/each.py
+++ b/pypeln/process/api/each.py
@@ -98,7 +98,7 @@ def process_image(image_path):
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         run: Whether or not to execute the stage immediately.
diff --git a/pypeln/process/api/filter.py b/pypeln/process/api/filter.py
index 3c2e1f1..6686c25 100644
--- a/pypeln/process/api/filter.py
+++ b/pypeln/process/api/filter.py
@@ -90,7 +90,7 @@ def slow_gt3(x):
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/process/api/flat_map.py b/pypeln/process/api/flat_map.py
index 7efe50e..ca26041 100644
--- a/pypeln/process/api/flat_map.py
+++ b/pypeln/process/api/flat_map.py
@@ -89,8 +89,8 @@ def slow_integer_pair(x):
     ```
 
     !!! note
-        Because of concurrency order is not guaranteed. 
-        
+        Because of concurrency order is not guaranteed.
+
     `flat_map` is a more general operation, you can actually implement `pypeln.process.map` and `pypeln.process.filter` with it, for example:
 
     ```python
@@ -107,7 +107,7 @@ def slow_integer_pair(x):
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/process/api/map.py b/pypeln/process/api/map.py
index e1961fa..863e0d4 100644
--- a/pypeln/process/api/map.py
+++ b/pypeln/process/api/map.py
@@ -83,14 +83,14 @@ def slow_add1(x):
     ```
 
     !!! note
-        Because of concurrency order is not guaranteed. 
+        Because of concurrency order is not guaranteed.
 
     Arguments:
         f: A function with the signature `f(x) -> y`. `f` can accept special additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/process/api/map_process_test.py b/pypeln/process/api/map_process_test.py
index 3fba59c..56f2daa 100644
--- a/pypeln/process/api/map_process_test.py
+++ b/pypeln/process/api/map_process_test.py
@@ -71,7 +71,7 @@ def test_timeout():
     def f(x):
         if x == 2:
             while True:
-                time.sleep(0.1)
+                time.sleep(0.02)
 
         return x
 
@@ -115,7 +115,11 @@ def on_done(y):
         namespace.on_done = y
 
     nums_pl = pl.process.map(
-        lambda x, y: y, nums, on_start=on_start, on_done=on_done, workers=n_workers,
+        lambda x, y: y,
+        nums,
+        on_start=on_start,
+        on_done=on_done,
+        workers=n_workers,
     )
     nums_pl = list(nums_pl)
 
@@ -145,6 +149,8 @@ def on_done(stage_status):
     )
     nums_pl = list(nums_pl)
 
+    time.sleep(0.1)
+
     assert namespace.x == 2
     assert namespace.done == True
     assert namespace.active_workers == 0
diff --git a/pypeln/process/api/ordered.py b/pypeln/process/api/ordered.py
index bb0da84..1c494c0 100644
--- a/pypeln/process/api/ordered.py
+++ b/pypeln/process/api/ordered.py
@@ -22,7 +22,10 @@ def __call__(self, worker: Worker, **kwargs):
 
 
 @tp.overload
-def ordered(stage: Stage[A], maxsize: int = 0,) -> Stage[A]:
+def ordered(
+    stage: Stage[A],
+    maxsize: int = 0,
+) -> Stage[A]:
     ...
 
 
@@ -47,7 +50,7 @@ def ordered(
 
     def slow_squared(x):
         time.sleep(random.random())
-        
+
         return x ** 2
 
     stage = range(5)
@@ -59,7 +62,7 @@ def slow_squared(x):
 
     !!! note
         `ordered` will work even if the previous stages are from different `pypeln` modules, but it may not work if you introduce an itermediate external iterable stage.
-    
+
     !!! warning
         This stage will not yield util it accumulates all of the elements from the previous stage, use this only if all elements fit in memory.
 
diff --git a/pypeln/process/api/to_iterable.py b/pypeln/process/api/to_iterable.py
index 7cd1ebb..fc895b5 100644
--- a/pypeln/process/api/to_iterable.py
+++ b/pypeln/process/api/to_iterable.py
@@ -17,7 +17,8 @@ def to_iterable(
 
 @tp.overload
 def to_iterable(
-    maxsize: int = 0, return_index: bool = False,
+    maxsize: int = 0,
+    return_index: bool = False,
 ) -> pypeln_utils.Partial[tp.Iterable[A]]:
     ...
 
diff --git a/pypeln/process/stage.py b/pypeln/process/stage.py
index e9b3702..ac10f65 100644
--- a/pypeln/process/stage.py
+++ b/pypeln/process/stage.py
@@ -71,7 +71,8 @@ def to_iterable(self, maxsize: int, return_index: bool) -> tp.Iterable[T]:
 
         # build stages first to verify reuse
         main_queue: IterableQueue[pypeln_utils.Element] = IterableQueue(
-            maxsize=maxsize, total_sources=self.workers,
+            maxsize=maxsize,
+            total_sources=self.workers,
         )
 
         built = {}
diff --git a/pypeln/process/worker.py b/pypeln/process/worker.py
index f38a913..33f2b29 100644
--- a/pypeln/process/worker.py
+++ b/pypeln/process/worker.py
@@ -146,7 +146,8 @@ def stop(self):
             self.process.terminate()
         else:
             stopit.async_raise(
-                self.process.ident, pypeln_utils.StopThreadException,
+                self.process.ident,
+                pypeln_utils.StopThreadException,
             )
 
     def done(self):
@@ -198,7 +199,7 @@ def __init__(self, namespace, lock):
     @property
     def done(self) -> bool:
         """
-        `bool` : `True` if all workers finished. 
+        `bool` : `True` if all workers finished.
         """
         with self._lock:
             return self._namespace.active_workers == 0
@@ -206,7 +207,7 @@ def done(self) -> bool:
     @property
     def active_workers(self):
         """
-        `int` : Number of active workers. 
+        `int` : Number of active workers.
         """
         with self._lock:
             return self._namespace.active_workers
diff --git a/pypeln/process/worker_process_test.py b/pypeln/process/worker_process_test.py
index 9db1953..bbf1405 100644
--- a/pypeln/process/worker_process_test.py
+++ b/pypeln/process/worker_process_test.py
@@ -28,7 +28,9 @@ def f(worker: pl.process.Worker):
                 worker.stage_params.output_queues.put(x)
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -49,7 +51,9 @@ def f(worker: pl.process.Worker):
 
         assert nums_pl == nums
 
-    def test_raises(self,):
+    def test_raises(
+        self,
+    ):
         input_queue = pl.process.IterableQueue()
         output_queue = pl.process.IterableQueue()
         output_queues = pl.process.OutputQueues([output_queue])
@@ -58,7 +62,9 @@ def f(worker: pl.process.Worker) -> None:
             raise MyException()
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -78,17 +84,21 @@ def f(worker: pl.process.Worker) -> None:
         with pytest.raises(MyException):
             nums_pl = list(output_queue)
 
-    def test_timeout(self,):
+    def test_timeout(
+        self,
+    ):
         input_queue = pl.process.IterableQueue()
         output_queue = pl.process.IterableQueue()
         output_queues = pl.process.OutputQueues([output_queue])
 
         def f(self: pl.process.Worker):
             with self.measure_task_time():
-                time.sleep(0.2)
+                time.sleep(0.8)
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -97,7 +107,7 @@ def f(self: pl.process.Worker):
             stage_params=stage_params,
             main_queue=output_queue,
             use_threads=True,
-            timeout=0.001,
+            timeout=0.01,
             on_start=None,
             on_done=None,
             f_args=[],
@@ -105,10 +115,12 @@ def f(self: pl.process.Worker):
         worker.start()
 
         assert not worker.did_timeout()
-        time.sleep(0.02)
+        time.sleep(0.1)
         assert worker.did_timeout()
 
-    def test_del1(self,):
+    def test_del1(
+        self,
+    ):
         input_queue = pl.process.IterableQueue()
         output_queue = pl.process.IterableQueue()
         output_queues = pl.process.OutputQueues([output_queue])
@@ -118,7 +130,9 @@ def f(self: pl.process.Worker):
                 time.sleep(0.01)
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -137,11 +151,13 @@ def f(self: pl.process.Worker):
         process = worker.process
 
         worker.stop()
-        time.sleep(0.1)
+        time.sleep(0.2)
 
         assert not process.is_alive()
 
-    def test_del3(self,):
+    def test_del3(
+        self,
+    ):
         def start_worker():
             input_queue = pl.process.IterableQueue()
             output_queue = pl.process.IterableQueue()
@@ -152,11 +168,15 @@ def f(self: pl.process.Worker):
                     time.sleep(0.01)
 
             stage_params: pl.process.StageParams = mock.Mock(
-                input_queue=input_queue, output_queues=output_queues, total_workers=1,
+                input_queue=input_queue,
+                output_queues=output_queues,
+                total_workers=1,
             )
 
             stage_params: pl.process.StageParams = mock.Mock(
-                input_queue=input_queue, output_queues=output_queues, total_workers=1,
+                input_queue=input_queue,
+                output_queues=output_queues,
+                total_workers=1,
             )
 
             worker = pl.process.Worker(
@@ -198,7 +218,9 @@ def f(worker: pl.process.Worker):
                 worker.stage_params.output_queues.put(x)
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -219,7 +241,9 @@ def f(worker: pl.process.Worker):
 
         assert nums_pl == nums
 
-    def test_raises(self,):
+    def test_raises(
+        self,
+    ):
         input_queue = pl.process.IterableQueue()
         output_queue = pl.process.IterableQueue()
         output_queues = pl.process.OutputQueues([output_queue])
@@ -228,7 +252,9 @@ def f(worker: pl.process.Worker) -> None:
             raise MyException()
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -248,17 +274,21 @@ def f(worker: pl.process.Worker) -> None:
         with pytest.raises(MyException):
             nums_pl = list(output_queue)
 
-    def test_timeout(self,):
+    def test_timeout(
+        self,
+    ):
         input_queue = pl.process.IterableQueue()
         output_queue = pl.process.IterableQueue()
         output_queues = pl.process.OutputQueues([output_queue])
 
         def f(self: pl.process.Worker):
             with self.measure_task_time():
-                time.sleep(0.2)
+                time.sleep(0.8)
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -267,7 +297,7 @@ def f(self: pl.process.Worker):
             stage_params=stage_params,
             main_queue=output_queue,
             use_threads=False,
-            timeout=0.001,
+            timeout=0.01,
             on_start=None,
             on_done=None,
             f_args=[],
@@ -278,7 +308,9 @@ def f(self: pl.process.Worker):
         time.sleep(0.1)
         assert worker.did_timeout()
 
-    def test_del1(self,):
+    def test_del1(
+        self,
+    ):
         input_queue = pl.process.IterableQueue()
         output_queue = pl.process.IterableQueue()
         output_queues = pl.process.OutputQueues([output_queue])
@@ -288,7 +320,9 @@ def f(self: pl.process.Worker):
                 time.sleep(0.01)
 
         stage_params: pl.process.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.process.Worker(
@@ -307,11 +341,13 @@ def f(self: pl.process.Worker):
         process = worker.process
 
         worker.stop()
-        time.sleep(0.1)
+        time.sleep(0.2)
 
         assert not process.is_alive()
 
-    def test_del3(self,):
+    def test_del3(
+        self,
+    ):
         def start_worker():
             input_queue = pl.process.IterableQueue()
             output_queue = pl.process.IterableQueue()
@@ -322,11 +358,15 @@ def f(self: pl.process.Worker):
                     time.sleep(0.01)
 
             stage_params: pl.process.StageParams = mock.Mock(
-                input_queue=input_queue, output_queues=output_queues, total_workers=1,
+                input_queue=input_queue,
+                output_queues=output_queues,
+                total_workers=1,
             )
 
             stage_params: pl.process.StageParams = mock.Mock(
-                input_queue=input_queue, output_queues=output_queues, total_workers=1,
+                input_queue=input_queue,
+                output_queues=output_queues,
+                total_workers=1,
             )
 
             worker = pl.process.Worker(
diff --git a/pypeln/sync/api/each.py b/pypeln/sync/api/each.py
index dbe76f3..3b2e31a 100644
--- a/pypeln/sync/api/each.py
+++ b/pypeln/sync/api/each.py
@@ -98,13 +98,13 @@ def process_image(image_path):
         stage: A Stage or Iterable.
         workers: This parameter is not used and only kept for API compatibility with the other modules.
         maxsize: This parameter is not used and only kept for API compatibility with the other modules.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         run: Whether or not to execute the stage immediately.
 
     !!! warning
-        To implement `timeout` we use `stopit.ThreadingTimeout` which has some limitations. 
+        To implement `timeout` we use `stopit.ThreadingTimeout` which has some limitations.
 
     Returns:
         If the `stage` parameters is not given then this function returns a `Partial`, else if `run=False` (default) it return a new stage, if `run=True` then it runs the stage and returns `None`.
diff --git a/pypeln/sync/api/filter.py b/pypeln/sync/api/filter.py
index bc082cb..e2d84f7 100644
--- a/pypeln/sync/api/filter.py
+++ b/pypeln/sync/api/filter.py
@@ -83,7 +83,7 @@ def slow_gt3(x):
         stage: A Stage or Iterable.
         workers: This parameter is not used and only kept for API compatibility with the other modules.
         maxsize: This parameter is not used and only kept for API compatibility with the other modules.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/sync/api/flat_map.py b/pypeln/sync/api/flat_map.py
index 56a3967..55e9df0 100644
--- a/pypeln/sync/api/flat_map.py
+++ b/pypeln/sync/api/flat_map.py
@@ -82,7 +82,7 @@ def slow_integer_pair(x):
     list(stage) # [0, 1, -1, 2, -2, ..., 9, -9]
     ```
 
-        
+
     `flat_map` is a more general operation, you can actually implement `pypeln.sync.map` and `pypeln.sync.filter` with it, for example:
 
     ```python
@@ -99,7 +99,7 @@ def slow_integer_pair(x):
         stage: A Stage or Iterable.
         workers: This parameter is not used and only kept for API compatibility with the other modules.
         maxsize: This parameter is not used and only kept for API compatibility with the other modules.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/sync/api/map.py b/pypeln/sync/api/map.py
index 99b45eb..d7c5fb3 100644
--- a/pypeln/sync/api/map.py
+++ b/pypeln/sync/api/map.py
@@ -85,7 +85,7 @@ def slow_add1(x):
         stage: A Stage or Iterable.
         workers: This parameter is not used and only kept for API compatibility with the other modules.
         maxsize: This parameter is not used and only kept for API compatibility with the other modules.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/sync/api/map_sync_test.py b/pypeln/sync/api/map_sync_test.py
index 7ffdc86..9416003 100644
--- a/pypeln/sync/api/map_sync_test.py
+++ b/pypeln/sync/api/map_sync_test.py
@@ -67,7 +67,7 @@ def test_timeout():
     def f(x):
         if x == 2:
             while True:
-                time.sleep(0.1)
+                time.sleep(0.02)
 
         return x
 
@@ -88,7 +88,12 @@ def on_start(worker_info):
     def _lambda(x, index):
         return index
 
-    nums_pl = pl.sync.map(_lambda, nums, on_start=on_start, workers=n_workers,)
+    nums_pl = pl.sync.map(
+        _lambda,
+        nums,
+        on_start=on_start,
+        workers=n_workers,
+    )
     nums_pl = set(nums_pl)
 
     assert nums_pl.issubset(set(range(n_workers)))
@@ -109,7 +114,11 @@ def on_done(y):
         namespace.on_done = y
 
     nums_pl = pl.sync.map(
-        lambda x, y: y, nums, on_start=on_start, on_done=on_done, workers=n_workers,
+        lambda x, y: y,
+        nums,
+        on_start=on_start,
+        on_done=on_done,
+        workers=n_workers,
     )
     nums_pl = list(nums_pl)
 
@@ -139,6 +148,8 @@ def on_done(stage_status):
     )
     nums_pl = list(nums_pl)
 
+    time.sleep(0.1)
+
     assert namespace.x == 2
     assert namespace.done == True
     assert namespace.active_workers == 0
diff --git a/pypeln/sync/api/ordered.py b/pypeln/sync/api/ordered.py
index a41eb51..e3fc539 100644
--- a/pypeln/sync/api/ordered.py
+++ b/pypeln/sync/api/ordered.py
@@ -39,7 +39,7 @@ def ordered(
 
     def slow_squared(x):
         time.sleep(random.random())
-        
+
         return x ** 2
 
     stage = range(5)
@@ -49,11 +49,11 @@ def slow_squared(x):
     print(list(stage)) # [0, 1, 4, 9, 16]
     ```
 
-    Since `sync.map` preserves order, instead we used `thread.map` so this example made sense. 
+    Since `sync.map` preserves order, instead we used `thread.map` so this example made sense.
 
     !!! note
         `ordered` will work even if the previous stages are from different `pypeln` modules, but it may not work if you introduce an itermediate external iterable stage.
-    
+
     !!! warning
         This stage will not yield util it accumulates all of the elements from the previous stage, use this only if all elements fit in memory.
 
diff --git a/pypeln/sync/api/to_iterable.py b/pypeln/sync/api/to_iterable.py
index ccd1862..1b71e87 100644
--- a/pypeln/sync/api/to_iterable.py
+++ b/pypeln/sync/api/to_iterable.py
@@ -17,7 +17,8 @@ def to_iterable(
 
 @tp.overload
 def to_iterable(
-    maxsize: int = 0, return_index: bool = False,
+    maxsize: int = 0,
+    return_index: bool = False,
 ) -> pypeln_utils.Partial[tp.Iterable[A]]:
     ...
 
diff --git a/pypeln/sync/stage.py b/pypeln/sync/stage.py
index e5b3d13..6232a11 100644
--- a/pypeln/sync/stage.py
+++ b/pypeln/sync/stage.py
@@ -76,13 +76,15 @@ def run(self) -> tp.Iterable:
         kwargs.setdefault("worker_info", worker_info)
 
         yield from self.process_fn(
-            self, **{key: value for key, value in kwargs.items() if key in self.f_args},
+            self,
+            **{key: value for key, value in kwargs.items() if key in self.f_args},
         )
 
         if self.on_done is not None:
 
             kwargs.setdefault(
-                "stage_status", StageStatus(),
+                "stage_status",
+                StageStatus(),
             )
 
             self.on_done(
@@ -124,14 +126,14 @@ class StageStatus(tp.NamedTuple):
     @property
     def done(self) -> bool:
         """
-        `bool` : `True` if all workers finished. 
+        `bool` : `True` if all workers finished.
         """
         return True
 
     @property
     def active_workers(self):
         """
-        `int` : Number of active workers. 
+        `int` : Number of active workers.
         """
         return 0
 
diff --git a/pypeln/task/api/each.py b/pypeln/task/api/each.py
index ae1ca52..30c44c4 100644
--- a/pypeln/task/api/each.py
+++ b/pypeln/task/api/each.py
@@ -112,7 +112,7 @@ def process_image(image_path):
         f: A function with signature `f(x) -> None`. `f` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         run: Whether or not to execute the stage immediately. If each is running inside another coroutine / task then avoid using `run=True` since it will block the event loop, use `await pl.task.each(...)` instead.
diff --git a/pypeln/task/api/filter.py b/pypeln/task/api/filter.py
index e5ff43d..6d9b25c 100644
--- a/pypeln/task/api/filter.py
+++ b/pypeln/task/api/filter.py
@@ -95,7 +95,7 @@ def slow_gt3(x):
         stage: A Stage, Iterable or AsyncIterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/task/api/flat_map.py b/pypeln/task/api/flat_map.py
index eded8e0..0f58e96 100644
--- a/pypeln/task/api/flat_map.py
+++ b/pypeln/task/api/flat_map.py
@@ -107,8 +107,8 @@ def slow_integer_pair(x):
     ```
 
     !!! note
-        Because of concurrency order is not guaranteed. 
-        
+        Because of concurrency order is not guaranteed.
+
     `flat_map` is a more general operation, you can actually implement `pypeln.process.map` and `pypeln.process.filter` with it, for example:
 
     ```python
@@ -125,7 +125,7 @@ def slow_integer_pair(x):
         stage: A Stage, Iterable or AsyncIterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/task/api/map.py b/pypeln/task/api/map.py
index bc00110..806913d 100644
--- a/pypeln/task/api/map.py
+++ b/pypeln/task/api/map.py
@@ -87,14 +87,14 @@ def slow_add1(x):
     ```
 
     !!! note
-        Because of concurrency order is not guaranteed. 
+        Because of concurrency order is not guaranteed.
 
     Arguments:
         f: A function with the signature `f(x) -> y`. `f` can accept special additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         stage: A Stage, Iterable or AsyncIterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/task/api/map_task_test.py b/pypeln/task/api/map_task_test.py
index 3261d27..c611846 100644
--- a/pypeln/task/api/map_task_test.py
+++ b/pypeln/task/api/map_task_test.py
@@ -184,7 +184,7 @@ def test_timeout():
     async def f(x):
         if x == 2:
             while True:
-                await asyncio.sleep(0.1)
+                await asyncio.sleep(0.02)
 
         return x
 
@@ -266,7 +266,11 @@ def on_done(y):
         namespace.on_done = y
 
     nums_pl = pl.task.map(
-        lambda x, y: y, nums, on_start=on_start, on_done=on_done, workers=n_workers,
+        lambda x, y: y,
+        nums,
+        on_start=on_start,
+        on_done=on_done,
+        workers=n_workers,
     )
     nums_pl = list(nums_pl)
 
@@ -290,7 +294,11 @@ def on_done(y):
         namespace.on_done = y
 
     nums_pl = pl.task.map(
-        lambda x, y: y, nums, on_start=on_start, on_done=on_done, workers=n_workers,
+        lambda x, y: y,
+        nums,
+        on_start=on_start,
+        on_done=on_done,
+        workers=n_workers,
     )
     nums_pl = await nums_pl
 
@@ -320,6 +328,8 @@ def on_done(stage_status):
     )
     nums_pl = list(nums_pl)
 
+    time.sleep(0.1)
+
     assert namespace.x == 2
     assert namespace.done == True
     assert namespace.active_workers == 0
@@ -348,6 +358,8 @@ def on_done(stage_status):
     )
     nums_pl = await nums_pl
 
+    await asyncio.sleep(0.1)
+
     assert namespace.x == 2
     assert namespace.done == True
     assert namespace.active_workers == 0
diff --git a/pypeln/task/api/ordered.py b/pypeln/task/api/ordered.py
index 91542c1..0762d73 100644
--- a/pypeln/task/api/ordered.py
+++ b/pypeln/task/api/ordered.py
@@ -49,7 +49,7 @@ def ordered(
 
     def slow_squared(x):
         time.sleep(random.random())
-        
+
         return x ** 2
 
     stage = range(5)
@@ -61,7 +61,7 @@ def slow_squared(x):
 
     !!! note
         `ordered` will work even if the previous stages are from different `pypeln` modules, but it may not work if you introduce an itermediate external iterable stage.
-    
+
     !!! warning
         This stage will not yield util it accumulates all of the elements from the previous stage, use this only if all elements fit in memory.
 
diff --git a/pypeln/task/api/to_iterable.py b/pypeln/task/api/to_iterable.py
index 540014c..ed04261 100644
--- a/pypeln/task/api/to_iterable.py
+++ b/pypeln/task/api/to_iterable.py
@@ -18,7 +18,8 @@ def to_iterable(
 
 @tp.overload
 def to_iterable(
-    maxsize: int = 0, return_index: bool = False,
+    maxsize: int = 0,
+    return_index: bool = False,
 ) -> pypeln_utils.Partial[tp.Iterable[A]]:
     ...
 
@@ -68,7 +69,8 @@ def to_async_iterable(
 
 @tp.overload
 def to_async_iterable(
-    maxsize: int = 0, return_index: bool = False,
+    maxsize: int = 0,
+    return_index: bool = False,
 ) -> pypeln_utils.Partial[tp.AsyncIterable[A]]:
     ...
 
diff --git a/pypeln/task/stage.py b/pypeln/task/stage.py
index 87d8563..3ad3852 100644
--- a/pypeln/task/stage.py
+++ b/pypeln/task/stage.py
@@ -42,7 +42,8 @@ def build(
         )
 
         stage_params = StageParams.create(
-            input_queue=input_queue, output_queues=built[self],
+            input_queue=input_queue,
+            output_queues=built[self],
         )
 
         yield Worker(
@@ -65,7 +66,8 @@ def to_iterable(self, maxsize: int, return_index: bool) -> tp.Iterable[T]:
         utils.get_running_loop()
 
         main_queue: IterableQueue[pypeln_utils.Element] = IterableQueue(
-            maxsize=maxsize, total_sources=1,
+            maxsize=maxsize,
+            total_sources=1,
         )
 
         built = {}
@@ -86,7 +88,8 @@ async def to_async_iterable(
 
         # build stages first to verify reuse
         main_queue: IterableQueue[pypeln_utils.Element] = IterableQueue(
-            maxsize=maxsize, total_sources=1,
+            maxsize=maxsize,
+            total_sources=1,
         )
 
         built = {}
diff --git a/pypeln/task/utils.py b/pypeln/task/utils.py
index 39efd91..b20efda 100644
--- a/pypeln/task/utils.py
+++ b/pypeln/task/utils.py
@@ -42,7 +42,8 @@ def run_coroutine_in_loop(
 
 
 def run_function_in_loop(
-    f: tp.Callable[[], tp.Any], loop: tp.Optional[asyncio.AbstractEventLoop] = None,
+    f: tp.Callable[[], tp.Any],
+    loop: tp.Optional[asyncio.AbstractEventLoop] = None,
 ) -> asyncio.Handle:
     loop = loop if loop else get_running_loop()
 
diff --git a/pypeln/task/worker.py b/pypeln/task/worker.py
index 5e60ccc..4fcdcdc 100644
--- a/pypeln/task/worker.py
+++ b/pypeln/task/worker.py
@@ -107,7 +107,8 @@ async def __call__(self):
             if self.on_done is not None:
 
                 kwargs.setdefault(
-                    "stage_status", StageStatus(),
+                    "stage_status",
+                    StageStatus(),
                 )
 
                 coro = self.on_done(
@@ -165,14 +166,14 @@ class StageStatus(tp.NamedTuple):
     @property
     def done(self) -> bool:
         """
-        `bool` : `True` if all workers finished. 
+        `bool` : `True` if all workers finished.
         """
         return True
 
     @property
     def active_workers(self):
         """
-        `int` : Number of active workers. 
+        `int` : Number of active workers.
         """
         return 0
 
diff --git a/pypeln/task/worker_task_test.py b/pypeln/task/worker_task_test.py
index 2a554d4..b8126ae 100644
--- a/pypeln/task/worker_task_test.py
+++ b/pypeln/task/worker_task_test.py
@@ -43,7 +43,9 @@ async def f(worker: pl.task.Worker):
             await worker.stage_params.output_queues.put(x)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -81,7 +83,9 @@ async def f(worker: pl.task.Worker):
             await worker.stage_params.output_queues.put(x)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -114,7 +118,9 @@ async def f(worker: pl.task.Worker):
         raise MyException()
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -147,7 +153,9 @@ async def f(worker: pl.task.Worker):
         raise MyException()
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -184,7 +192,9 @@ async def task():
         await worker.tasks.put(task)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -228,7 +238,9 @@ async def task():
         await worker.tasks.put(task)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -270,7 +282,9 @@ async def task():
         await worker.tasks.put(task)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -311,7 +325,9 @@ async def task():
         await worker.tasks.put(task)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
     worker = pl.task.Worker(
         process_fn=CustomProcess(f),
@@ -345,7 +361,9 @@ async def f(worker: pl.task.Worker):
             await asyncio.sleep(0.01)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -365,7 +383,7 @@ async def f(worker: pl.task.Worker):
     time.sleep(0.01)
 
     worker.stop()
-    time.sleep(0.02)
+    time.sleep(0.2)
 
     assert task.cancelled()
     assert worker.is_done
@@ -382,7 +400,9 @@ async def f(worker: pl.task.Worker):
             await asyncio.sleep(0.01)
 
     stage_params: pl.task.StageParams = mock.Mock(
-        input_queue=input_queue, output_queues=output_queues, total_workers=1,
+        input_queue=input_queue,
+        output_queues=output_queues,
+        total_workers=1,
     )
 
     worker = pl.task.Worker(
@@ -402,7 +422,7 @@ async def f(worker: pl.task.Worker):
     await asyncio.sleep(0.01)
 
     worker.stop()
-    await asyncio.sleep(0.01)
+    await asyncio.sleep(0.2)
 
     assert task.cancelled()
     assert worker.is_done
@@ -419,11 +439,15 @@ async def f(worker: pl.task.Worker):
                 await asyncio.sleep(0.01)
 
         stage_params: pl.task.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         stage_params: pl.task.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.task.Worker(
@@ -462,7 +486,9 @@ async def f(worker: pl.task.Worker):
                 await asyncio.sleep(0.01)
 
         stage_params: pl.task.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.task.Worker(
diff --git a/pypeln/thread/api/each.py b/pypeln/thread/api/each.py
index e34feb3..7b9cfa6 100644
--- a/pypeln/thread/api/each.py
+++ b/pypeln/thread/api/each.py
@@ -98,7 +98,7 @@ def process_image(image_path):
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         run: Whether or not to execute the stage immediately.
diff --git a/pypeln/thread/api/filter.py b/pypeln/thread/api/filter.py
index 03d0a4a..0a1d896 100644
--- a/pypeln/thread/api/filter.py
+++ b/pypeln/thread/api/filter.py
@@ -90,7 +90,7 @@ def slow_gt3(x):
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/thread/api/flat_map.py b/pypeln/thread/api/flat_map.py
index 89189c6..3970998 100644
--- a/pypeln/thread/api/flat_map.py
+++ b/pypeln/thread/api/flat_map.py
@@ -89,8 +89,8 @@ def slow_integer_pair(x):
     ```
 
     !!! note
-        Because of concurrency order is not guaranteed. 
-        
+        Because of concurrency order is not guaranteed.
+
     `flat_map` is a more general operation, you can actually implement `pypeln.process.map` and `pypeln.process.filter` with it, for example:
 
     ```python
@@ -107,7 +107,7 @@ def slow_integer_pair(x):
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/thread/api/map.py b/pypeln/thread/api/map.py
index d3c6755..a16a6e1 100644
--- a/pypeln/thread/api/map.py
+++ b/pypeln/thread/api/map.py
@@ -83,14 +83,14 @@ def slow_add1(x):
     ```
 
     !!! note
-        Because of concurrency order is not guaranteed. 
+        Because of concurrency order is not guaranteed.
 
     Arguments:
         f: A function with the signature `f(x) -> y`. `f` can accept special additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         stage: A Stage or Iterable.
         workers: The number of workers the stage should contain.
         maxsize: The maximum number of objects the stage can hold simultaneously, if set to `0` (default) then the stage can grow unbounded.
-        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded. 
+        timeout: Seconds before stoping the worker if its current task is not yet completed. Defaults to `0` which means its unbounded.
         on_start: A function with signature `on_start(worker_info?) -> kwargs?`, where `kwargs` can be a `dict` of keyword arguments that can be consumed by `f` and `on_done`. `on_start` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
         on_done: A function with signature `on_done(stage_status?)`. This function is executed once per worker when the worker finishes. `on_done` can accept additional arguments by name as described in [Advanced Usage](https://cgarciae.github.io/pypeln/advanced/#dependency-injection).
 
diff --git a/pypeln/thread/api/map_thread_test.py b/pypeln/thread/api/map_thread_test.py
index ee6d65e..6d50a9a 100644
--- a/pypeln/thread/api/map_thread_test.py
+++ b/pypeln/thread/api/map_thread_test.py
@@ -71,7 +71,7 @@ def test_timeout():
     def f(x):
         if x == 2:
             while True:
-                time.sleep(0.1)
+                time.sleep(0.02)
 
         return x
 
@@ -115,7 +115,11 @@ def on_done(y):
         namespace.on_done = y
 
     nums_pl = pl.thread.map(
-        lambda x, y: y, nums, on_start=on_start, on_done=on_done, workers=n_workers,
+        lambda x, y: y,
+        nums,
+        on_start=on_start,
+        on_done=on_done,
+        workers=n_workers,
     )
     nums_pl = list(nums_pl)
 
@@ -145,6 +149,8 @@ def on_done(stage_status):
     )
     nums_pl = list(nums_pl)
 
+    time.sleep(0.1)
+
     assert namespace.x == 2
     assert namespace.done == True
     assert namespace.active_workers == 0
diff --git a/pypeln/thread/api/ordered.py b/pypeln/thread/api/ordered.py
index d0f2372..0f2f6d0 100644
--- a/pypeln/thread/api/ordered.py
+++ b/pypeln/thread/api/ordered.py
@@ -47,7 +47,7 @@ def ordered(
 
     def slow_squared(x):
         time.sleep(random.random())
-        
+
         return x ** 2
 
     stage = range(5)
@@ -59,7 +59,7 @@ def slow_squared(x):
 
     !!! note
         `ordered` will work even if the previous stages are from different `pypeln` modules, but it may not work if you introduce an itermediate external iterable stage.
-    
+
     !!! warning
         This stage will not yield util it accumulates all of the elements from the previous stage, use this only if all elements fit in memory.
 
diff --git a/pypeln/thread/api/to_iterable.py b/pypeln/thread/api/to_iterable.py
index adc8786..5222cf9 100644
--- a/pypeln/thread/api/to_iterable.py
+++ b/pypeln/thread/api/to_iterable.py
@@ -17,7 +17,8 @@ def to_iterable(
 
 @tp.overload
 def to_iterable(
-    maxsize: int = 0, return_index: bool = False,
+    maxsize: int = 0,
+    return_index: bool = False,
 ) -> pypeln_utils.Partial[tp.Iterable[A]]:
     ...
 
diff --git a/pypeln/thread/stage.py b/pypeln/thread/stage.py
index a825411..13fbbcd 100644
--- a/pypeln/thread/stage.py
+++ b/pypeln/thread/stage.py
@@ -69,7 +69,8 @@ def to_iterable(self, maxsize: int, return_index: bool) -> tp.Iterable[T]:
 
         # build stages first to verify reuse
         main_queue: IterableQueue[pypeln_utils.Element] = IterableQueue(
-            maxsize=maxsize, total_sources=self.workers,
+            maxsize=maxsize,
+            total_sources=self.workers,
         )
 
         built = {}
diff --git a/pypeln/thread/worker.py b/pypeln/thread/worker.py
index 73a281c..c4b2efe 100644
--- a/pypeln/thread/worker.py
+++ b/pypeln/thread/worker.py
@@ -140,7 +140,8 @@ def stop(self):
             return
 
         stopit.async_raise(
-            self.process.ident, pypeln_utils.StopThreadException,
+            self.process.ident,
+            pypeln_utils.StopThreadException,
         )
 
     def done(self):
@@ -192,7 +193,7 @@ def __init__(self, namespace, lock):
     @property
     def done(self) -> bool:
         """
-        `bool` : `True` if all workers finished. 
+        `bool` : `True` if all workers finished.
         """
         with self._lock:
             return self._namespace.active_workers == 0
@@ -200,7 +201,7 @@ def done(self) -> bool:
     @property
     def active_workers(self):
         """
-        `int` : Number of active workers. 
+        `int` : Number of active workers.
         """
         with self._lock:
             return self._namespace.active_workers
diff --git a/pypeln/thread/worker_thread_test.py b/pypeln/thread/worker_thread_test.py
index d5898cb..66c4076 100644
--- a/pypeln/thread/worker_thread_test.py
+++ b/pypeln/thread/worker_thread_test.py
@@ -28,7 +28,9 @@ def f(worker: pl.thread.Worker):
                 worker.stage_params.output_queues.put(x)
 
         stage_params: pl.thread.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.thread.Worker(
@@ -48,7 +50,9 @@ def f(worker: pl.thread.Worker):
 
         assert nums_pl == nums
 
-    def test_raises(self,):
+    def test_raises(
+        self,
+    ):
         input_queue = pl.thread.IterableQueue()
         output_queue = pl.thread.IterableQueue()
         output_queues = pl.thread.OutputQueues([output_queue])
@@ -57,7 +61,9 @@ def f(worker: pl.thread.Worker) -> None:
             raise MyException()
 
         stage_params: pl.thread.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.thread.Worker(
@@ -76,17 +82,21 @@ def f(worker: pl.thread.Worker) -> None:
         with pytest.raises(MyException):
             nums_pl = list(output_queue)
 
-    def test_timeout(self,):
+    def test_timeout(
+        self,
+    ):
         input_queue = pl.thread.IterableQueue()
         output_queue = pl.thread.IterableQueue()
         output_queues = pl.thread.OutputQueues([output_queue])
 
         def f(self: pl.thread.Worker):
             with self.measure_task_time():
-                time.sleep(0.2)
+                time.sleep(0.8)
 
         stage_params: pl.thread.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.thread.Worker(
@@ -94,7 +104,7 @@ def f(self: pl.thread.Worker):
             index=0,
             stage_params=stage_params,
             main_queue=output_queue,
-            timeout=0.001,
+            timeout=0.01,
             on_start=None,
             on_done=None,
             f_args=[],
@@ -102,10 +112,12 @@ def f(self: pl.thread.Worker):
         worker.start()
 
         assert not worker.did_timeout()
-        time.sleep(0.02)
+        time.sleep(0.1)
         assert worker.did_timeout()
 
-    def test_del1(self,):
+    def test_del1(
+        self,
+    ):
         input_queue = pl.thread.IterableQueue()
         output_queue = pl.thread.IterableQueue()
         output_queues = pl.thread.OutputQueues([output_queue])
@@ -115,7 +127,9 @@ def f(self: pl.thread.Worker):
                 time.sleep(0.01)
 
         stage_params: pl.thread.StageParams = mock.Mock(
-            input_queue=input_queue, output_queues=output_queues, total_workers=1,
+            input_queue=input_queue,
+            output_queues=output_queues,
+            total_workers=1,
         )
 
         worker = pl.thread.Worker(
@@ -133,11 +147,13 @@ def f(self: pl.thread.Worker):
         process = worker.process
 
         worker.stop()
-        time.sleep(0.1)
+        time.sleep(0.2)
 
         assert not process.is_alive()
 
-    def test_del3(self,):
+    def test_del3(
+        self,
+    ):
         def start_worker():
             input_queue = pl.thread.IterableQueue()
             output_queue = pl.thread.IterableQueue()
@@ -148,11 +164,15 @@ def f(self: pl.thread.Worker):
                     time.sleep(0.01)
 
             stage_params: pl.thread.StageParams = mock.Mock(
-                input_queue=input_queue, output_queues=output_queues, total_workers=1,
+                input_queue=input_queue,
+                output_queues=output_queues,
+                total_workers=1,
             )
 
             stage_params: pl.thread.StageParams = mock.Mock(
-                input_queue=input_queue, output_queues=output_queues, total_workers=1,
+                input_queue=input_queue,
+                output_queues=output_queues,
+                total_workers=1,
             )
 
             worker = pl.thread.Worker(
diff --git a/pyproject.toml b/pyproject.toml
index bf36d95..9cebe5d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -27,10 +27,10 @@ mkdocs-material = "^4.6.3"
 pytest-sugar = "^0.9.2"
 tqdm = "^4.43.0"
 coverage = "^5.0.4"
-black = {version = "^19.10b0", allow-prereleases = true}
 mkautodoc = "^0.1.0"
 mkdocstrings = { version = "^0.12.0", python = ">=3.6" }
 debugpy = "^1.0.0-rc.2"
+black = {version = "^20.8b1", allow-prereleases = true}
 
 [build-system]
 requires = ["poetry>=0.12"]
diff --git a/scripts/get-coverage.sh b/scripts/tests-and-coverage.sh
similarity index 55%
rename from scripts/get-coverage.sh
rename to scripts/tests-and-coverage.sh
index 9eaf3ea..79d958c 100644
--- a/scripts/get-coverage.sh
+++ b/scripts/tests-and-coverage.sh
@@ -1,6 +1,6 @@
 set -e
 
-coverage run --concurrency=multiprocessing -m pytest
+coverage run --concurrency=multiprocessing -m pytest --hypothesis-profile=pypeln
 coverage combine
 coverage html --omit '.venv/*' --omit '*_test.py'
 rm .coverage