diff --git a/tests/adapters/conftest.py b/tests/adapters/conftest.py
index 48a3594cc..66b36b3e8 100644
--- a/tests/adapters/conftest.py
+++ b/tests/adapters/conftest.py
@@ -5,10 +5,16 @@
 import requests
 
 
-@pytest.fixture(autouse=True)
+@pytest.fixture(autouse=True, scope="function")
 def set_ci_env(monkeypatch):
-    """Super unpleasant workaround to deal with monty's deprecation behaviour."""
-    monkeypatch.setenv("CI", "false")
+    """Super unpleasant workaround to deal with monty's deprecation behaviour,
+    see:
+
+        - https://github.com/materialsproject/pymatgen/issues/4243
+        - https://github.com/materialsvirtuallab/monty/pull/735
+
+    """
+    monkeypatch.delenv("CI", raising=False)
     yield