diff --git a/locust/test/__init__.py b/locust/test/__init__.py
index b8fc66aef5..fb03d61122 100644
--- a/locust/test/__init__.py
+++ b/locust/test/__init__.py
@@ -20,3 +20,4 @@
 os.environ.pop("LOCUST_WEB_LOGIN", None)
 # Ensure locust-cloud is not loaded during tests
 os.environ.pop("PGHOST", None)
+os.environ.pop("CHHOST", None)