From a31119c82019f0b31d94c6beb5ea7bf546bc5521 Mon Sep 17 00:00:00 2001
From: Chris Leary <cdleary@gmail.com>
Date: Sun, 28 Apr 2024 18:58:25 -0700
Subject: [PATCH] Make a way to run a particular test case.

---
 README.md | 6 ++++++
 tox.ini   | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 88c07d7..b563f18 100644
--- 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
index 8700f56..9401ca7 100644
--- 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'}