diff --git a/python/wpt/__init__.py b/python/wpt/__init__.py
index 91760b84a27..9686df91ec2 100644
--- a/python/wpt/__init__.py
+++ b/python/wpt/__init__.py
@@ -33,9 +33,9 @@ def create_parser():
                         help="Run under chaos mode in rr until a failure is captured")
     parser.add_argument('--pref', default=[], action="append", dest="prefs",
                         help="Pass preferences to servo")
-    parser.add_argument('--layout-2020', '--with-layout-2020', default=False,
+    parser.add_argument('--layout-2020', '--with-layout-2020', default=True,
                         action="store_true", help="Use expected results for the 2020 layout engine")
-    parser.add_argument('--layout-2013', '--with-layout-2013', default=True,
+    parser.add_argument('--layout-2013', '--with-layout-2013', default=False,
                         action="store_true", help="Use expected results for the 2013 layout engine")
     parser.add_argument('--log-servojson', action="append", type=mozlog.commandline.log_file,
                         help="Servo's JSON logger of unexpected results")
@@ -53,17 +53,16 @@ def create_parser():
 
 
 def update_args_for_legacy_layout(kwargs: dict):
-    if kwargs.pop("layout_2020"):
-        return
-    kwargs["test_paths"]["/"]["metadata_path"] = os.path.join(
-        WPT_PATH, "meta-legacy-layout"
-    )
-    kwargs["test_paths"]["/_mozilla/"]["metadata_path"] = os.path.join(
-        WPT_PATH, "mozilla", "meta-legacy-layout"
-    )
-    kwargs["include_manifest"] = os.path.join(
-        WPT_PATH, "include-legacy-layout.ini"
-    )
+    if kwargs.pop("layout_2013"):
+        kwargs["test_paths"]["/"]["metadata_path"] = os.path.join(
+            WPT_PATH, "meta-legacy-layout"
+        )
+        kwargs["test_paths"]["/_mozilla/"]["metadata_path"] = os.path.join(
+            WPT_PATH, "mozilla", "meta-legacy-layout"
+        )
+        kwargs["include_manifest"] = os.path.join(
+            WPT_PATH, "include-legacy-layout.ini"
+        )
 
 
 def run_tests():
diff --git a/python/wpt/run.py b/python/wpt/run.py
index 2b3cad5d563..558312164ed 100644
--- a/python/wpt/run.py
+++ b/python/wpt/run.py
@@ -103,7 +103,7 @@ def run_tests(**kwargs):
     kwargs.setdefault("binary_args", [])
     if prefs:
         kwargs["binary_args"] += ["--pref=" + pref for pref in prefs]
-    if not kwargs.get("layout_2020", False):
+    if kwargs.get("layout_2013"):
         kwargs["binary_args"] += ["--legacy-layout"]
 
     if not kwargs.get("no_default_test_types"):
diff --git a/python/wpt/update.py b/python/wpt/update.py
index 70b52b2acc3..73604140b6d 100644
--- a/python/wpt/update.py
+++ b/python/wpt/update.py
@@ -126,8 +126,8 @@ def run_update(**kwargs) -> bool:
 
 def create_parser(**_kwargs):
     parser = wptcommandline.create_parser_update()
-    parser.add_argument("--layout-2020", "--with-layout-2020", default=False, action="store_true",
+    parser.add_argument("--layout-2020", "--with-layout-2020", default=True, action="store_true",
                         help="Use expected results for the 2020 layout engine")
-    parser.add_argument("--layout-2013", "--with-layout-2013", default=True, action="store_true",
+    parser.add_argument("--layout-2013", "--with-layout-2013", default=False, action="store_true",
                         help="Use expected results for the 2013 layout engine")
     return parser