diff --git a/WordPress-Core/ruleset.xml b/WordPress-Core/ruleset.xml
index 8542a2ae27..9a0de3af1b 100644
--- a/WordPress-Core/ruleset.xml
+++ b/WordPress-Core/ruleset.xml
@@ -558,6 +558,9 @@
 	<!-- Covers rule: The PHP native __...__ magic constants should be in uppercase when used. -->
 	<rule ref="Universal.Constants.UppercaseMagicConstants"/>
 
+	<!-- Covers rule: Use of the backtick operator is not allowed. -->
+	<rule ref="Generic.PHP.BacktickOperator"/>
+
 
 
 
diff --git a/WordPress-Extra/ruleset.xml b/WordPress-Extra/ruleset.xml
index 6ec9eeb45f..3f81259494 100644
--- a/WordPress-Extra/ruleset.xml
+++ b/WordPress-Extra/ruleset.xml
@@ -96,9 +96,6 @@
 		 https://github.com/WordPress/WordPress-Coding-Standards/issues/1146 -->
 	<rule ref="WordPress.WP.EnqueuedResourceParameters"/>
 
-	<!-- Discourage use of the backtick operator (execution of shell commands).
-		 https://github.com/WordPress/WordPress-Coding-Standards/pull/646 -->
-	<rule ref="Generic.PHP.BacktickOperator"/>
 
 	<!-- Check for PHP Parse errors.
 		 https://github.com/WordPress/WordPress-Coding-Standards/issues/522 -->