fix: prevent module cloning in pytest plugin

ddtrace/contrib/internal/pytest/plugin.py

@@ -11,6 +11,7 @@
         expected failures.
 
 """
+
 import os
 from typing import Dict  # noqa:F401
 
@@ -119,6 +120,9 @@ def pytest_addoption(parser):
 
 
 def pytest_configure(config):
+    # Prevent ddtrace.auto from triggering module cloning
+    os.environ["DD_UNLOAD_MODULES_FROM_SITECUSTOMIZE"] = "0"
+
     config.addinivalue_line("markers", "dd_tags(**kwargs): add tags to current span")
     if is_enabled(config):
         _disable_telemetry_dependency_collection()

releasenotes/notes/fix-pytest-plugin-module-cloning-8b2288bb1d722885.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    CI Visibility: prevent ``KeyError`` from pytest runs when ``gevent`` is
+    detected within the environment.