Make a way to run a particular test case.

cdleary · Apr 29, 2024 · a31119c · a31119c
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diff --git a/README.md b/README.md
@@ -66,6 +66,12 @@ On Ubuntu previous Python versions can be installed with relative easy via the
 deadsnakes PPA: see instructions in
 https://tech.joellemena.com/python/install-python3-6-in-ubuntu-22-04/
 
+To run a specific test via `tox` on a specific Python version:
+
+```
+PYTEST_ARGS=-ktry_except_raise tox -e py37
+```
+
 ### py.test
 
 py.test is run for any given Python version under test -- it is driven via a

diff --git a/tox.ini b/tox.ini
@@ -8,4 +8,4 @@ deps =
 commands =
     mypy src/echo
     pycodestyle src/ tests/ bin/echo_vm
-    pytest -k 'not knownf'
+    pytest {env:PYTEST_ARGS:-k 'not knownf'}