diff --git a/webdriver/tests/fullscreen_window/fullscreen.py b/webdriver/tests/fullscreen_window/fullscreen.py
index 5391114c67676d..3834c3eb8df863 100644
--- a/webdriver/tests/fullscreen_window/fullscreen.py
+++ b/webdriver/tests/fullscreen_window/fullscreen.py
@@ -26,7 +26,7 @@ def test_fullscreen(session):
     response = fullscreen(session)
     assert_success(response)
 
-    assert is_fullscreen(session) is True
+    assert is_fullscreen(session)
 
 
 def test_payload(session):
@@ -47,12 +47,12 @@ def test_payload(session):
 
 
 def test_fullscreen_twice_is_idempotent(session):
-    assert is_fullscreen(session) is False
+    assert not is_fullscreen(session)
 
     first_response = fullscreen(session)
     assert_success(first_response)
-    assert is_fullscreen(session) is True
+    assert is_fullscreen(session)
 
     second_response = fullscreen(session)
     assert_success(second_response)
-    assert is_fullscreen(session) is True
+    assert is_fullscreen(session)
diff --git a/webdriver/tests/fullscreen_window/user_prompts.py b/webdriver/tests/fullscreen_window/user_prompts.py
index 04b8bc5337db7b..bbaa84b6144629 100644
--- a/webdriver/tests/fullscreen_window/user_prompts.py
+++ b/webdriver/tests/fullscreen_window/user_prompts.py
@@ -24,7 +24,7 @@ def is_fullscreen(session):
 @pytest.fixture
 def check_user_prompt_closed_without_exception(session, create_dialog):
     def check_user_prompt_closed_without_exception(dialog_type, retval):
-        assert is_fullscreen(session) is False
+        assert not is_fullscreen(session)
 
         create_dialog(dialog_type, text=dialog_type)
 
@@ -32,8 +32,7 @@ def check_user_prompt_closed_without_exception(dialog_type, retval):
         assert_success(response)
 
         assert_dialog_handled(session, expected_text=dialog_type, expected_retval=retval)
-
-        assert is_fullscreen(session) is True
+        assert is_fullscreen(session)
 
     return check_user_prompt_closed_without_exception
 
@@ -41,7 +40,7 @@ def check_user_prompt_closed_without_exception(dialog_type, retval):
 @pytest.fixture
 def check_user_prompt_closed_with_exception(session, create_dialog):
     def check_user_prompt_closed_with_exception(dialog_type, retval):
-        assert is_fullscreen(session) is False
+        assert not is_fullscreen(session)
 
         create_dialog(dialog_type, text=dialog_type)
 
@@ -49,8 +48,7 @@ def check_user_prompt_closed_with_exception(dialog_type, retval):
         assert_error(response, "unexpected alert open")
 
         assert_dialog_handled(session, expected_text=dialog_type, expected_retval=retval)
-
-        assert is_fullscreen(session) is False
+        assert not is_fullscreen(session)
 
     return check_user_prompt_closed_with_exception
 
@@ -58,7 +56,7 @@ def check_user_prompt_closed_with_exception(dialog_type, retval):
 @pytest.fixture
 def check_user_prompt_not_closed_but_exception(session, create_dialog):
     def check_user_prompt_not_closed_but_exception(dialog_type):
-        assert is_fullscreen(session) is False
+        assert not is_fullscreen(session)
 
         create_dialog(dialog_type, text=dialog_type)
 
@@ -68,7 +66,7 @@ def check_user_prompt_not_closed_but_exception(dialog_type):
         assert session.alert.text == dialog_type
         session.alert.dismiss()
 
-        assert is_fullscreen(session) is False
+        assert not is_fullscreen(session)
 
     return check_user_prompt_not_closed_but_exception
 
diff --git a/webdriver/tests/maximize_window/maximize.py b/webdriver/tests/maximize_window/maximize.py
index 77af0b99169a91..6149a48bf3ba13 100644
--- a/webdriver/tests/maximize_window/maximize.py
+++ b/webdriver/tests/maximize_window/maximize.py
@@ -24,11 +24,11 @@ def test_no_browsing_context(session, closed_window):
 
 def test_fully_exit_fullscreen(session):
     session.window.fullscreen()
-    assert is_fullscreen(session) is True
+    assert is_fullscreen(session)
 
     response = maximize(session)
     assert_success(response)
-    assert is_fullscreen(session) is False
+    assert not is_fullscreen(session)
 
 
 def test_restore_the_window(session):
diff --git a/webdriver/tests/set_window_rect/set.py b/webdriver/tests/set_window_rect/set.py
index 928fd622efc22f..5023cac4e1c037 100644
--- a/webdriver/tests/set_window_rect/set.py
+++ b/webdriver/tests/set_window_rect/set.py
@@ -142,14 +142,14 @@ def test_no_change(session, rect):
 
 def test_fully_exit_fullscreen(session):
     session.window.fullscreen()
-    assert is_fullscreen(session) is True
+    assert is_fullscreen(session)
 
     response = set_window_rect(session, {"width": 400, "height": 400})
     value = assert_success(response)
     assert value["width"] == 400
     assert value["height"] == 400
 
-    assert is_fullscreen(session) is False
+    assert not is_fullscreen(session)
 
 
 def test_restore_from_minimized(session):