diff --git a/superset/security.py b/superset/security.py
index 11759852a..b1274f05f 100644
--- a/superset/security.py
+++ b/superset/security.py
@@ -104,16 +104,16 @@ def get_or_create_main_db():
 
 def is_admin_only(pvm):
     # not readonly operations on read only model views allowed only for admins
-    if (pvm.view_menu.name in READ_ONLY_MODEL_VIEWS
-            and pvm.permission.name not in READ_ONLY_PERMISSION):
+    if (pvm.view_menu.name in READ_ONLY_MODEL_VIEWS and
+            pvm.permission.name not in READ_ONLY_PERMISSION):
         return True
-    return (pvm.view_menu.name in ADMIN_ONLY_VIEW_MENUS
-            or pvm.permission.name in ADMIN_ONLY_PERMISSIONS)
+    return (pvm.view_menu.name in ADMIN_ONLY_VIEW_MENUS or
+        pvm.permission.name in ADMIN_ONLY_PERMISSIONS)
 
 
 def is_alpha_only(pvm):
-    if (pvm.view_menu.name in GAMMA_READ_ONLY_MODEL_VIEWS
-            and pvm.permission.name not in READ_ONLY_PERMISSION):
+    if (pvm.view_menu.name in GAMMA_READ_ONLY_MODEL_VIEWS and
+            pvm.permission.name not in READ_ONLY_PERMISSION):
         return True
     return pvm.permission.name in ALPHA_ONLY_PERMISSIONS
 
diff --git a/superset/sql_lab.py b/superset/sql_lab.py
index 50bcc1b52..dffa85c81 100644
--- a/superset/sql_lab.py
+++ b/superset/sql_lab.py
@@ -153,8 +153,8 @@ def execute_sql(
                 query.user_id, start_dttm.strftime('%Y_%m_%d_%H_%M_%S'))
         executed_sql = superset_query.as_create_table(query.tmp_table_name)
         query.select_as_cta_used = True
-    elif (query.limit and superset_query.is_select()
-          and db_engine_spec.limit_method == LimitMethod.WRAP_SQL):
+    elif (query.limit and superset_query.is_select() and
+            db_engine_spec.limit_method == LimitMethod.WRAP_SQL):
         executed_sql = database.wrap_sql_limit(executed_sql, query.limit)
         query.limit_used = True
     try:
diff --git a/superset/utils.py b/superset/utils.py
index 569147bad..0bdf30d0b 100644
--- a/superset/utils.py
+++ b/superset/utils.py
@@ -377,8 +377,8 @@ def generic_find_constraint_name(table, columns, referenced, db):
     t = sa.Table(table, db.metadata, autoload=True, autoload_with=db.engine)
 
     for fk in t.foreign_key_constraints:
-        if (fk.referred_table.name == referenced
-                and set(fk.column_keys) == columns):
+        if (fk.referred_table.name == referenced and
+                set(fk.column_keys) == columns):
             return fk.name
 
 
diff --git a/tests/core_tests.py b/tests/core_tests.py
index 41556d15e..062da5e72 100644
--- a/tests/core_tests.py
+++ b/tests/core_tests.py
@@ -695,8 +695,8 @@ class CoreTests(SupersetTestCase):
     def test_fetch_datasource_metadata(self):
         self.login(username='admin')
         url = (
-            '/superset/fetch_datasource_metadata?'
-            + 'datasourceKey=1__table'
+            '/superset/fetch_datasource_metadata?' +
+            'datasourceKey=1__table'
         )
         resp = self.get_json_resp(url)
         keys = [
diff --git a/tests/security_tests.py b/tests/security_tests.py
index ac7e0c80d..cb2ff634b 100644
--- a/tests/security_tests.py
+++ b/tests/security_tests.py
@@ -168,4 +168,3 @@ class RolePermissionTests(SupersetTestCase):
 
         self.assert_cannot_gamma(granter_set)
         self.assert_cannot_alpha(granter_set)
-
diff --git a/tox.ini b/tox.ini
index 5e197a081..e94a5e772 100644
--- a/tox.ini
+++ b/tox.ini
@@ -47,11 +47,6 @@ ignore =
     F405
     Q000
     Q001
-    W291
-    W292
-    W293
-    W391
-    W503
 import-order-style = google
 max-line-length = 90