diff -u b/core/modules/layout/layouts/static/one-col/one-col.yml b/core/modules/layout/layouts/static/one-col/one-col.yml
--- b/core/modules/layout/layouts/static/one-col/one-col.yml
+++ b/core/modules/layout/layouts/static/one-col/one-col.yml
@@ -6,2 +6,2 @@
-    label: Middle column
-    type: content
\ No newline at end of file
+    label: 'Content'
+    type: content
diff -u b/core/modules/layout/layouts/static/twocol/two-col.yml b/core/modules/layout/layouts/static/twocol/two-col.yml
--- b/core/modules/layout/layouts/static/twocol/two-col.yml
+++ b/core/modules/layout/layouts/static/twocol/two-col.yml
@@ -7,6 +7,6 @@
   first:
-    label: Left side
+    label: 'First column'
     type: content
   second:
-    label: Right side
+    label: 'Second column'
     type: aside
diff -u b/core/modules/layout/tests/config/display.bound.test_twocol.yml b/core/modules/layout/tests/config/display.bound.test_twocol.yml
--- b/core/modules/layout/tests/config/display.bound.test_twocol.yml
+++ b/core/modules/layout/tests/config/display.bound.test_twocol.yml
@@ -18 +18 @@
-    weight: -100
\ No newline at end of file
+    weight: -100
diff -u b/core/modules/layout/tests/config/display.unbound.test_unbound_display.yml b/core/modules/layout/tests/config/display.unbound.test_unbound_display.yml
--- b/core/modules/layout/tests/config/display.unbound.test_unbound_display.yml
+++ b/core/modules/layout/tests/config/display.unbound.test_unbound_display.yml
@@ -14 +14 @@
-    weight: 0
\ No newline at end of file
+    weight: 0
diff -u b/core/modules/layout/tests/layouts/static/one-col/one-col.yml b/core/modules/layout/tests/layouts/static/one-col/one-col.yml
--- b/core/modules/layout/tests/layouts/static/one-col/one-col.yml
+++ b/core/modules/layout/tests/layouts/static/one-col/one-col.yml
@@ -5,3 +5,3 @@
   middle:
-    label: Middle column
+    label: 'Middle column'
     type: content
diff -u b/core/modules/layout/tests/themes/layout_test_theme/layouts/static/two-col/two-col.yml b/core/modules/layout/tests/themes/layout_test_theme/layouts/static/two-col/two-col.yml
--- b/core/modules/layout/tests/themes/layout_test_theme/layouts/static/two-col/two-col.yml
+++ b/core/modules/layout/tests/themes/layout_test_theme/layouts/static/two-col/two-col.yml
@@ -8,5 +8,5 @@
-    label: Left side
+    label: 'Left side'
     type: content
   right:
-    label: Right side
-    type: aside
\ No newline at end of file
+    label: 'Right side'
+    type: aside