diff --git a/.toxrc b/.toxrc
index 0ab0717..63b4a1a 100644
--- a/.toxrc
+++ b/.toxrc
@@ -19,7 +19,7 @@ commands =
    poetry --version
    poetry version
    poetry run coverage erase
-   poetry run coverage run -m pytest tests
+   poetry run coverage run -m pytest --force-testdox --color=no tests
    poetry run coverage report
 
 [testenv:docs]
diff --git a/Changelog b/Changelog
index ce5602d..45ca7aa 100644
--- a/Changelog
+++ b/Changelog
@@ -1,3 +1,7 @@
+Version 0.1.20     unreleased
+
+	* Run test suite with python-testdox for more verbose output.
+
 Version 0.1.19     17 Feb 2021
 
 	* Standardize the format of the Apache v2 statement in LICENSE.
diff --git a/docs/requirements.txt b/docs/requirements.txt
index fa88de8..6ee5ca8 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.12; python_version >= "3.6"
-apologies==0.1.31; python_version >= "3.7" and python_version < "4"
+apologies==0.1.33; python_version >= "3.7" and python_version < "4"
 appdirs==1.4.4; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 astroid==2.4.2; python_version >= "3.6"
 asyncio-periodic==2019.2
@@ -8,7 +8,7 @@ atomicwrites==1.4.0; python_version >= "3.6" and python_full_version < "3.0.0" a
 attrs==20.3.0; python_version >= "3.7" and python_full_version < "3.0.0" and python_version < "4" or python_version >= "3.7" and python_version < "4" and python_full_version >= "3.4.0"
 babel==2.9.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
 black==20.8b1; python_version >= "3.6"
-cattrs==1.2.0; python_version >= "3.7" and python_version < "4.0"
+cattrs==1.3.0; python_version >= "3.7" and python_version < "4.0"
 certifi==2020.12.5; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
 cfgv==3.2.0; python_full_version >= "3.6.1"
 chardet==4.0.0; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
@@ -21,10 +21,10 @@ docopt==0.6.2; python_version >= "3.5"
 docutils==0.16; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 dparse==0.5.1; python_version >= "3.5"
 filelock==3.0.12; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
-identify==1.5.13; python_full_version >= "3.6.1"
+identify==1.5.14; python_full_version >= "3.6.1"
 idna==2.10; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.5"
 imagesize==1.2.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
-importlib-metadata==3.4.0; python_version < "3.8" and python_version >= "3.6" and (python_version >= "3.6" and python_full_version < "3.0.0" and python_version < "3.8" or python_full_version >= "3.5.0" and python_version < "3.8" and python_version >= "3.6") and python_full_version >= "3.6.1" and (python_version >= "3.6" and python_full_version < "3.0.0" and python_version < "3.8" or python_full_version >= "3.4.0" and python_version >= "3.6" and python_version < "3.8")
+importlib-metadata==3.7.0; python_version < "3.8" and python_version >= "3.6" and (python_version >= "3.6" and python_full_version < "3.0.0" and python_version < "3.8" or python_full_version >= "3.5.0" and python_version < "3.8" and python_version >= "3.6") and python_full_version >= "3.6.1" and (python_version >= "3.6" and python_full_version < "3.0.0" and python_version < "3.8" or python_full_version >= "3.4.0" and python_version >= "3.6" and python_version < "3.8")
 iniconfig==1.1.1; python_version >= "3.6"
 isort==5.7.0; python_version >= "3.6" and python_version < "4.0"
 jinja2==2.11.3; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
@@ -42,10 +42,11 @@ pendulum==2.1.2; python_version >= "3.7" and python_full_version < "3.0.0" and p
 pluggy==0.13.1; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 pre-commit==2.10.1; python_full_version >= "3.6.1"
 py==1.10.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
-pygments==2.7.4; python_version >= "3.6"
-pylint==2.6.0; python_version >= "3.5"
+pygments==2.8.0; python_version >= "3.6"
+pylint==2.6.2; python_version >= "3.5"
 pyparsing==2.4.7; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
 pytest-asyncio==0.12.0; python_version >= "3.5"
+pytest-testdox==2.0.1; python_version >= "3.5"
 pytest==6.2.2; python_version >= "3.6"
 python-dateutil==2.8.1; python_version >= "3.7" and python_full_version < "3.0.0" and python_version < "4" or python_version >= "3.7" and python_version < "4" and python_full_version >= "3.5.0"
 pytz==2021.1; python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.5"
@@ -57,7 +58,7 @@ safety==1.10.3; python_version >= "3.5"
 six==1.15.0; python_version >= "3.7" and python_full_version < "3.0.0" and python_version < "4" or python_full_version >= "3.5.0" and python_version >= "3.7" and python_version < "4"
 snowballstemmer==2.1.0; python_version >= "3.6"
 sphinx-autoapi==1.7.0; python_version >= "3.6"
-sphinx==3.4.3; python_version >= "3.5"
+sphinx==3.5.1; python_version >= "3.5"
 sphinxcontrib-applehelp==1.0.2; python_version >= "3.6"
 sphinxcontrib-devhelp==1.0.2; python_version >= "3.6"
 sphinxcontrib-htmlhelp==1.0.3; python_version >= "3.6"
@@ -65,7 +66,7 @@ sphinxcontrib-jsmath==1.0.1; python_version >= "3.6"
 sphinxcontrib-qthelp==1.0.3; python_version >= "3.6"
 sphinxcontrib-serializinghtml==1.1.4; python_version >= "3.6"
 toml==0.10.2; (python_version >= "2.6" and python_full_version < "3.0.0") or (python_full_version >= "3.3.0")
-tox==3.21.4; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0")
+tox==3.22.0; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0")
 typed-ast==1.4.2; implementation_name == "cpython" and python_version < "3.8" and python_version >= "3.6"
 typing-extensions==3.7.4.3; python_version < "3.8" and python_version >= "3.6"
 unidecode==1.2.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.4.0" and python_version >= "3.6"
diff --git a/poetry.lock b/poetry.lock
index feb2a85..8d2aff6 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -8,7 +8,7 @@ python-versions = "*"
 
 [[package]]
 name = "apologies"
-version = "0.1.31"
+version = "0.1.33"
 description = "Python code to play a game similar to Sorry"
 category = "main"
 optional = false
@@ -114,7 +114,7 @@ d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
 name = "cattrs"
-version = "1.2.0"
+version = "1.3.0"
 description = "Composable complex class support for attrs."
 category = "main"
 optional = false
@@ -124,7 +124,7 @@ python-versions = "~=3.7"
 attrs = ">=20.1.0"
 
 [package.extras]
-dev = ["bumpversion", "wheel", "watchdog", "flake8", "tox", "coverage", "sphinx", "pytest", "hypothesis", "pendulum", "isort", "black"]
+dev = ["bumpversion", "wheel", "watchdog", "flake8", "tox", "coverage", "sphinx", "pytest", "pytest-benchmark", "hypothesis", "pendulum", "isort", "black"]
 
 [[package]]
 name = "certifi"
@@ -243,7 +243,7 @@ python-versions = "*"
 
 [[package]]
 name = "identify"
-version = "1.5.13"
+version = "1.5.14"
 description = "File identification library for Python"
 category = "dev"
 optional = false
@@ -270,7 +270,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "importlib-metadata"
-version = "3.4.0"
+version = "3.7.0"
 description = "Read metadata from Python packages"
 category = "dev"
 optional = false
@@ -463,7 +463,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pygments"
-version = "2.7.4"
+version = "2.8.0"
 description = "Pygments is a syntax highlighting package written in Python."
 category = "dev"
 optional = false
@@ -471,14 +471,14 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "pylint"
-version = "2.6.0"
+version = "2.6.2"
 description = "python code static checker"
 category = "dev"
 optional = false
 python-versions = ">=3.5.*"
 
 [package.dependencies]
-astroid = ">=2.4.0,<=2.5"
+astroid = ">=2.4.0,<2.5"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 isort = ">=4.2.5,<6"
 mccabe = ">=0.6,<0.7"
@@ -528,6 +528,17 @@ pytest = ">=5.4.0"
 [package.extras]
 testing = ["async_generator (>=1.3)", "coverage", "hypothesis (>=5.7.1)"]
 
+[[package]]
+name = "pytest-testdox"
+version = "2.0.1"
+description = "A testdox format reporter for pytest"
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
+[package.dependencies]
+pytest = ">=3.7.0"
+
 [[package]]
 name = "python-dateutil"
 version = "2.8.1"
@@ -621,7 +632,7 @@ python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "3.4.3"
+version = "3.5.1"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -647,7 +658,7 @@ sphinxcontrib-serializinghtml = "*"
 
 [package.extras]
 docs = ["sphinxcontrib-websupport"]
-lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.790)", "docutils-stubs"]
+lint = ["flake8 (>=3.5.0)", "isort", "mypy (>=0.800)", "docutils-stubs"]
 test = ["pytest", "pytest-cov", "html5lib", "cython", "typed-ast"]
 
 [[package]]
@@ -751,7 +762,7 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "tox"
-version = "3.21.4"
+version = "3.22.0"
 description = "tox is a generic virtualenv management and test command line tool"
 category = "dev"
 optional = false
@@ -859,7 +870,7 @@ testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<4"
-content-hash = "14936b50875bb29bd0255258ba2986748b39691c83247eb8d547f640ec3fd094"
+content-hash = "b6d1b5170f22da37cfea7c3acf3b1ec6205fc89320a33049aaa5e93ff8f9615c"
 
 [metadata.files]
 alabaster = [
@@ -867,8 +878,8 @@ alabaster = [
     {file = "alabaster-0.7.12.tar.gz", hash = "sha256:a661d72d58e6ea8a57f7a86e37d86716863ee5e92788398526d58b26a4e4dc02"},
 ]
 apologies = [
-    {file = "apologies-0.1.31-py3-none-any.whl", hash = "sha256:5b6e425b9fbd95f6df8058d9191a4fe6c8e6ecea1678c912d19866c03d2c732c"},
-    {file = "apologies-0.1.31.tar.gz", hash = "sha256:011ea39423eb3a16f9c0b702724574aa3153005d71e5b1d34dc38e8a3858a62d"},
+    {file = "apologies-0.1.33-py3-none-any.whl", hash = "sha256:84ef078d47f0b67d2135666438f21c8fd4d8c5b468e393cba88629762af543d4"},
+    {file = "apologies-0.1.33.tar.gz", hash = "sha256:de78609c44e49bafda3566f63020d81c7d3132c6384bdb4604e6023de17aff81"},
 ]
 appdirs = [
     {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
@@ -902,8 +913,8 @@ black = [
     {file = "black-20.8b1.tar.gz", hash = "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"},
 ]
 cattrs = [
-    {file = "cattrs-1.2.0-py3-none-any.whl", hash = "sha256:6deb42a9166e00fe44f89cfa40ebe8d8164f31fa6001de90cced5ffac0622444"},
-    {file = "cattrs-1.2.0.tar.gz", hash = "sha256:daa70f0755d2e052b4854862f1c3afe2cc02d4de5f16fb72c249ac1608d2fd83"},
+    {file = "cattrs-1.3.0-py3-none-any.whl", hash = "sha256:f92ca39ccb7373289f9cccf71b86849a29a2d75370bc983e7bf579ce95bfccd8"},
+    {file = "cattrs-1.3.0.tar.gz", hash = "sha256:12688f56fbb7f54cf647d031669840e1ab0b9a198bf374a217fcb5be821855df"},
 ]
 certifi = [
     {file = "certifi-2020.12.5-py2.py3-none-any.whl", hash = "sha256:719a74fb9e33b9bd44cc7f3a8d94bc35e4049deebe19ba7d8e108280cfd59830"},
@@ -1000,8 +1011,8 @@ filelock = [
     {file = "filelock-3.0.12.tar.gz", hash = "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59"},
 ]
 identify = [
-    {file = "identify-1.5.13-py2.py3-none-any.whl", hash = "sha256:9dfb63a2e871b807e3ba62f029813552a24b5289504f5b071dea9b041aee9fe4"},
-    {file = "identify-1.5.13.tar.gz", hash = "sha256:70b638cf4743f33042bebb3b51e25261a0a10e80f978739f17e7fd4837664a66"},
+    {file = "identify-1.5.14-py2.py3-none-any.whl", hash = "sha256:e0dae57c0397629ce13c289f6ddde0204edf518f557bfdb1e56474aa143e77c3"},
+    {file = "identify-1.5.14.tar.gz", hash = "sha256:de7129142a5c86d75a52b96f394d94d96d497881d2aaf8eafe320cdbe8ac4bcc"},
 ]
 idna = [
     {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
@@ -1012,8 +1023,8 @@ imagesize = [
     {file = "imagesize-1.2.0.tar.gz", hash = "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"},
 ]
 importlib-metadata = [
-    {file = "importlib_metadata-3.4.0-py3-none-any.whl", hash = "sha256:ace61d5fc652dc280e7b6b4ff732a9c2d40db2c0f92bc6cb74e07b73d53a1771"},
-    {file = "importlib_metadata-3.4.0.tar.gz", hash = "sha256:fa5daa4477a7414ae34e95942e4dd07f62adf589143c875c133c1e53c4eff38d"},
+    {file = "importlib_metadata-3.7.0-py3-none-any.whl", hash = "sha256:c6af5dbf1126cd959c4a8d8efd61d4d3c83bddb0459a17e554284a077574b614"},
+    {file = "importlib_metadata-3.7.0.tar.gz", hash = "sha256:24499ffde1b80be08284100393955842be4a59c7c16bbf2738aad0e464a8e0aa"},
 ]
 iniconfig = [
     {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
@@ -1164,12 +1175,12 @@ py = [
     {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
 ]
 pygments = [
-    {file = "Pygments-2.7.4-py3-none-any.whl", hash = "sha256:bc9591213a8f0e0ca1a5e68a479b4887fdc3e75d0774e5c71c31920c427de435"},
-    {file = "Pygments-2.7.4.tar.gz", hash = "sha256:df49d09b498e83c1a73128295860250b0b7edd4c723a32e9bc0d295c7c2ec337"},
+    {file = "Pygments-2.8.0-py3-none-any.whl", hash = "sha256:b21b072d0ccdf29297a82a2363359d99623597b8a265b8081760e4d0f7153c88"},
+    {file = "Pygments-2.8.0.tar.gz", hash = "sha256:37a13ba168a02ac54cc5891a42b1caec333e59b66addb7fa633ea8a6d73445c0"},
 ]
 pylint = [
-    {file = "pylint-2.6.0-py3-none-any.whl", hash = "sha256:bfe68f020f8a0fece830a22dd4d5dddb4ecc6137db04face4c3420a46a52239f"},
-    {file = "pylint-2.6.0.tar.gz", hash = "sha256:bb4a908c9dadbc3aac18860550e870f58e1a02c9f2c204fdf5693d73be061210"},
+    {file = "pylint-2.6.2-py3-none-any.whl", hash = "sha256:e71c2e9614a4f06e36498f310027942b0f4f2fde20aebb01655b31edc63b9eaf"},
+    {file = "pylint-2.6.2.tar.gz", hash = "sha256:718b74786ea7ed07aa0c58bf572154d4679f960d26e9641cc1de204a30b87fc9"},
 ]
 pyparsing = [
     {file = "pyparsing-2.4.7-py2.py3-none-any.whl", hash = "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"},
@@ -1182,6 +1193,10 @@ pytest = [
 pytest-asyncio = [
     {file = "pytest-asyncio-0.12.0.tar.gz", hash = "sha256:475bd2f3dc0bc11d2463656b3cbaafdbec5a47b47508ea0b329ee693040eebd2"},
 ]
+pytest-testdox = [
+    {file = "pytest-testdox-2.0.1.tar.gz", hash = "sha256:5cd1d986cb9e33edca4271c57541c57d868781c8090e551374d7e6eeafac465a"},
+    {file = "pytest_testdox-2.0.1-py2.py3-none-any.whl", hash = "sha256:ce9d516c047f718e7707975582e52d6ac922330bdcf87837f8d3fd619057af6f"},
+]
 python-dateutil = [
     {file = "python-dateutil-2.8.1.tar.gz", hash = "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c"},
     {file = "python_dateutil-2.8.1-py2.py3-none-any.whl", hash = "sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a"},
@@ -1277,8 +1292,8 @@ snowballstemmer = [
     {file = "snowballstemmer-2.1.0.tar.gz", hash = "sha256:e997baa4f2e9139951b6f4c631bad912dfd3c792467e2f03d7239464af90e914"},
 ]
 sphinx = [
-    {file = "Sphinx-3.4.3-py3-none-any.whl", hash = "sha256:c314c857e7cd47c856d2c5adff514ac2e6495f8b8e0f886a8a37e9305dfea0d8"},
-    {file = "Sphinx-3.4.3.tar.gz", hash = "sha256:41cad293f954f7d37f803d97eb184158cfd90f51195131e94875bc07cd08b93c"},
+    {file = "Sphinx-3.5.1-py3-none-any.whl", hash = "sha256:e90161222e4d80ce5fc811ace7c6787a226b4f5951545f7f42acf97277bfc35c"},
+    {file = "Sphinx-3.5.1.tar.gz", hash = "sha256:11d521e787d9372c289472513d807277caafb1684b33eb4f08f7574c405893a9"},
 ]
 sphinx-autoapi = [
     {file = "sphinx-autoapi-1.7.0.tar.gz", hash = "sha256:48caa054a99c21156e9a1d26559281dc27f86ab8ef8bb6ef160f8cd9f4a0053d"},
@@ -1313,8 +1328,8 @@ toml = [
     {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
 ]
 tox = [
-    {file = "tox-3.21.4-py2.py3-none-any.whl", hash = "sha256:65d0e90ceb816638a50d64f4b47b11da767b284c0addda2294cb3cd69bd72425"},
-    {file = "tox-3.21.4.tar.gz", hash = "sha256:cf7fef81a3a2434df4d7af2a6d1bf606d2970220addfbe7dea2615bd4bb2c252"},
+    {file = "tox-3.22.0-py2.py3-none-any.whl", hash = "sha256:89afa9c59c04beb55eda789c7a65feb1a70fde117f85f1bd1c27c66758456e60"},
+    {file = "tox-3.22.0.tar.gz", hash = "sha256:ed1e650cf6368bcbc4a071eeeba363c480920e0ed8a9ad1793c7caaa5ad33d49"},
 ]
 typed-ast = [
     {file = "typed_ast-1.4.2-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:7703620125e4fb79b64aa52427ec192822e9f45d37d4b6625ab37ef403e1df70"},
diff --git a/pyproject.toml b/pyproject.toml
index 0764f8a..7e6f2fb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,9 +31,10 @@ ordered-set = "^4.0.1"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2"
+pytest-testdox = "^2.0.1"
 coverage = "^5.0.3"
 tox = "^3.14.5"
-pylint = "^2.6.0"
+pylint = ">=2.6.0,<2.7"   # bug with astroid and OrderedSet
 sphinx = "^3.4.3"
 toml = "^0.10.0"
 pre-commit = "^2.2.0"
diff --git a/run b/run
index f3acdbb..f51dcfb 100755
--- a/run
+++ b/run
@@ -143,7 +143,7 @@ run_pytest() {
    fi
 
    if [ $coverage == "yes" ]; then
-      poetry run coverage run -m pytest tests
+      poetry run coverage run -m pytest --testdox tests
       if [ $? != 0 ]; then
          exit 1
       fi
@@ -154,7 +154,7 @@ run_pytest() {
          $(which start || which open) .htmlcov/index.html 2>/dev/null  # start on Windows, open on MacOS
       fi
    else
-      poetry run pytest tests
+      poetry run pytest --testdox tests
       if [ $? != 0 ]; then
          exit 1
       fi