diff --git a/core/profiles/demo_umami/themes/umami/css/classy/components/form.css b/core/profiles/demo_umami/themes/umami/css/classy/components/form.css
index 61af1e1849..8a5c8c9f8f 100644
--- a/core/profiles/demo_umami/themes/umami/css/classy/components/form.css
+++ b/core/profiles/demo_umami/themes/umami/css/classy/components/form.css
@@ -37,6 +37,10 @@ tr.even .form-item {
   margin-top: 0;
   margin-bottom: 0;
 }
+td > .form-item:only-child{
+  margin-top: 0;
+  margin-bottom: 0;
+}
 .form-composite > .fieldset-wrapper > .description,
 .form-item .description {
   font-size: 0.85em;
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/ConfirmClassyCopiesTest.php b/core/tests/Drupal/KernelTests/Core/Theme/ConfirmClassyCopiesTest.php
index 576182ac5c..277df1aea9 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/ConfirmClassyCopiesTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/ConfirmClassyCopiesTest.php
@@ -687,7 +687,7 @@ protected function getClassyHash($type, $file) {
         'exposed-filters.css' => '396a5f76dafec5f78f4e736f69a0874f',
         'field.css' => '8f4718bc926eea7e007ecfd6f410ee8d',
         'file.css' => '7f36f62ca67c57a82f9d9e882918a01b',
-        'form.css' => 'a8733b00eebffbc3293779cb779c808e',
+        'form.css' => 'e655bf340ddf0afe4ded535eae1b04f4',
         'forum.css' => '8aad2d86dfd29818e991757581cd7ab8',
         'icons.css' => '56f623bd343b9bc7e7ac3e3e95d7f3ce',
         'image-widget.css' => '2da54829199f64a2c390930c3b0913a3',
diff --git a/core/themes/bartik/css/classy/components/form.css b/core/themes/bartik/css/classy/components/form.css
index 7f8aa4b35f..eeae3ff4f9 100644
--- a/core/themes/bartik/css/classy/components/form.css
+++ b/core/themes/bartik/css/classy/components/form.css
@@ -37,6 +37,10 @@ tr.even .form-item {
   margin-top: 0;
   margin-bottom: 0;
 }
+td > .form-item:only-child{
+  margin-top: 0;
+  margin-bottom: 0;
+}
 .form-composite > .fieldset-wrapper > .description,
 .form-item .description {
   font-size: 0.85em;
diff --git a/core/themes/classy/css/components/form.css b/core/themes/classy/css/components/form.css
index ff8780c03f..a1530c4f90 100644
--- a/core/themes/classy/css/components/form.css
+++ b/core/themes/classy/css/components/form.css
@@ -37,6 +37,10 @@ tr.even .form-item {
   margin-top: 0;
   margin-bottom: 0;
 }
+td > .form-item:only-child{
+  margin-top: 0;
+  margin-bottom: 0;
+}
 .form-composite > .fieldset-wrapper > .description,
 .form-item .description {
   font-size: 0.85em;
diff --git a/core/themes/seven/css/classy/components/form.css b/core/themes/seven/css/classy/components/form.css
index 7f8aa4b35f..eeae3ff4f9 100644
--- a/core/themes/seven/css/classy/components/form.css
+++ b/core/themes/seven/css/classy/components/form.css
@@ -37,6 +37,10 @@ tr.even .form-item {
   margin-top: 0;
   margin-bottom: 0;
 }
+td > .form-item:only-child{
+  margin-top: 0;
+  margin-bottom: 0;
+}
 .form-composite > .fieldset-wrapper > .description,
 .form-item .description {
   font-size: 0.85em;