diff --git a/tox.ini b/tox.ini
index af047af..4771f70 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,6 +27,7 @@ passenv =
     XAUTHORITY
     NUMPY_EXPERIMENTAL_ARRAY_FUNCTION
     PYVISTA_OFF_SCREEN
+    OPENAI_API_KEY
 extras =
     testing
 commands = pytest -v -o faulthandler_timeout=100 --color=yes --cov=napari_chatgpt --cov-report=xml