diff --git a/plasma/layout.py b/plasma/layout.py
index da689c2..ec25d3c 100644
--- a/plasma/layout.py
+++ b/plasma/layout.py
@@ -20,7 +20,7 @@ class Plasma(Layout):
         ('border_normal', '#333333', 'Unfocused window border color'),
         ('border_focus', '#00e891', 'Focused window border color'),
         ('border_normal_fixed', '#333333',
-         'Unfocused fixed-size window''border color'),
+         'Unfocused fixed-size window border color'),
         ('border_focus_fixed', '#00e8dc',
          'Focused fixed-size window border color'),
         ('border_width', 1, 'Border width'),
diff --git a/setup.cfg b/setup.cfg
index f37db7c..10ffd5f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -14,7 +14,7 @@ disable =
     attribute-defined-outside-init,
 
 [flake8]
-ignore = E226,E302,E305,E306,E731,F811
+ignore = E226,E302,E305,E306,E731,F811,W504
 exclude = __init__.py,lib/
 
 [coverage:run]
diff --git a/tests/test_node.py b/tests/test_node.py
index d893aad..b812028 100644
--- a/tests/test_node.py
+++ b/tests/test_node.py
@@ -179,22 +179,22 @@ def test_advanced_move2(self, root, grid):
         a, b, c, d, e = grid
         res = c.move_down()
         assert b.parent.tree == [b, [d, e], c]
-        assert res == True
+        assert res is True
         res = e.move_down()
         assert b.parent.tree == [b, d, e, c]
-        assert res == True
+        assert res is True
         res = e.move_left()
         assert root.tree == [a, e, [b, d, c]]
-        assert res == True
+        assert res is True
         res = d.move_right()
         assert root.tree == [a, e, [b, c], d]
-        assert res == True
+        assert res is True
         res = a.move_left()
         assert root.tree == [a, e, [b, c], d]
-        assert res == False
+        assert res is False
         res = d.move_right()
         assert root.tree == [a, e, [b, c], d]
-        assert res == False
+        assert res is False
 
     def test_move_blocked(self, root, grid):
         a, b, c, d, e = grid