show diff on failure

graingert · graingert · commit 20891457404a · 2020-09-03T14:02:09.000+01:00
diff --git a/tox.ini b/tox.ini
@@ -17,5 +17,5 @@ commands = coveralls
 
 [testenv:lint]
 deps = pre-commit
-commands = pre-commit run --all-files
+commands = pre-commit run --all-files --show-diff-on-failure {posargs}
 skip_install = true
