diff --git a/tests/core_tests.py b/tests/core_tests.py
index c5335538d..3ff43d345 100644
--- a/tests/core_tests.py
+++ b/tests/core_tests.py
@@ -143,7 +143,6 @@ class CoreTests(SupersetTestCase):
 
         form_data = {
             'viz_type': 'sankey',
-            'groupby': 'source',
             'groupby': 'target',
             'metric': 'sum__value',
             'row_limit': 5000,
@@ -165,7 +164,6 @@ class CoreTests(SupersetTestCase):
 
         form_data = {
             'viz_type': 'sankey',
-            'groupby': 'source',
             'groupby': 'target',
             'metric': 'sum__value',
             'row_limit': 5000,
diff --git a/tox.ini b/tox.ini
index 17065eeae..fd75723ee 100644
--- a/tox.ini
+++ b/tox.ini
@@ -45,7 +45,6 @@ ignore =
     F401
     F403
     F405
-    F601
     F811
     F841
     I100