diff --git a/tox.ini b/tox.ini
index 2a5217339d1..8a40b63fcc5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,8 @@ setenv =
 	PYTHONWARNDEFAULTENCODING = 1
 	SETUPTOOLS_ENFORCE_DEPRECATION = 1
 commands =
+	python -c 'from pathlib import Path; p = Path("setuptools.egg-info/PKG-INFO"); print(p.read_text(encoding="utf-8") if p.exists() else "NO PKG-INFO")'  # DEBUG
+	# ^ ensure no malformed egg-info in flaky tests
 	pytest {posargs}
 usedevelop = True
 extras =