diff --git a/src/py/kaleido/__init__.py b/src/py/kaleido/__init__.py
index 20afb0c..9572907 100644
--- a/src/py/kaleido/__init__.py
+++ b/src/py/kaleido/__init__.py
@@ -21,7 +21,7 @@
 
 def to_image_block(spec, f=None, topojson=None, mapbox_token=None, debug=None):
     if debug is None:
-        debug = "KALEIDO-DEBUG" in os.environ
+        debug = "KALEIDO-DEBUG" in os.environ or "KALEIDO_DEBUG" in os.environ
     try:
         _ = asyncio.get_running_loop()
         if debug: print("Got running loop, threading", file=sys.stderr)
@@ -44,7 +44,7 @@ def get_image():
 
 async def to_image(spec, f=None, topojson=None, mapbox_token=None, debug=None, timeout=60):
     if debug is None:
-        debug = "KALEIDO-DEBUG" in os.environ
+        debug = "KALEIDO-DEBUG" in os.environ or "KALEIDO_DEBUG" in os.environ
     def check_error(res):
         if 'error' in res:
             raise RuntimeError(str(res))
diff --git a/src/py/kaleido/scopes/plotly.py b/src/py/kaleido/scopes/plotly.py
index f99f64e..a314174 100644
--- a/src/py/kaleido/scopes/plotly.py
+++ b/src/py/kaleido/scopes/plotly.py
@@ -30,7 +30,7 @@ class PlotlyScope():
 
     def __init__(self, plotlyjs=None, mathjax=None, topojson=None, mapbox_access_token=None, debug=None, **kwargs):
         if debug is None:
-            debug = "KALEIDO-DEBUG" in os.environ
+            debug = "KALEIDO-DEBUG" in os.environ or "KALEIDO_DEBUG" in os.environ
         self.debug=debug
         # TODO: #2 This is deprecated, this whole FILE is deprecated
         self._plotlyjs = plotlyjs