diff --git a/core/modules/system/css/system.admin.css b/core/modules/system/css/system.admin.css
index fbdbab6..2d499f4 100644
--- a/core/modules/system/css/system.admin.css
+++ b/core/modules/system/css/system.admin.css
@@ -135,7 +135,6 @@ small .admin-link:after {
   padding-left: 0; /* LTR */
 }
 [dir="rtl"] .system-modules td {
-  padding-left: 12px;
   padding-right: 0;
 }
 
diff --git a/core/modules/system/css/system.diff.css b/core/modules/system/css/system.diff.css
index ca27b83..eaa0336 100644
--- a/core/modules/system/css/system.diff.css
+++ b/core/modules/system/css/system.diff.css
@@ -86,7 +86,6 @@ table.diff th {
 }
 [dir="rtl"] table.diff th {
   padding-left: inherit;
-  padding-right: 12px;
 }
 table.diff td div {
   overflow: auto;
diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index 1c0962c..0f5982a 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -288,6 +288,11 @@ td.checkbox,
 th.checkbox {
   text-align: center;
 }
+/* This is required to win over specifity of [dir="rtl"] td */
+[dir="rtl"] td.checkbox,
+[dir="rtl"] th.checkbox {
+  text-align: center;
+}
 
 /**
  * Progress bar.
diff --git a/core/themes/seven/css/components/tables.css b/core/themes/seven/css/components/tables.css
index 6fde17c..5c21c78 100644
--- a/core/themes/seven/css/components/tables.css
+++ b/core/themes/seven/css/components/tables.css
@@ -14,11 +14,14 @@ caption {
 }
 th {
   text-align: left; /* LTR */
-  padding: 10px 12px;
+  padding: 10px 12px; /* LTR */
 }
 [dir="rtl"] th {
   text-align: right;
 }
+[dir="rtl"] table.diff th {
+  padding-right: 12px;
+}
 thead th {
   background: #f5f5f2;
   border: solid #bfbfba;
@@ -42,12 +45,15 @@ th {
   vertical-align: middle;
 }
 td {
-  padding: 10px 12px;
+  padding: 10px 12px; /* LTR */
   text-align: left; /* LTR */
 }
 [dir="rtl"] td {
   text-align: right;
 }
+[dir="rtl"] .system-modules td {
+  padding-left: 12px;
+}
 th > a {
   position: relative;
   display: block;