diff --git a/WordPress/AbstractFunctionRestrictionsSniff.php b/WordPress/AbstractFunctionRestrictionsSniff.php
index 9c42343292..e3ac2b1185 100644
--- a/WordPress/AbstractFunctionRestrictionsSniff.php
+++ b/WordPress/AbstractFunctionRestrictionsSniff.php
@@ -224,7 +224,7 @@ public function is_targetted_token( $stackPtr ) {
 			return false;
 		}
 
-		if ( $this->is_token_namespaced( $stackPtr ) === true ) {
+		if ( ContextHelper::is_token_namespaced( $this->phpcsFile, $stackPtr ) === true ) {
 			return false;
 		}
 
diff --git a/WordPress/Helpers/ContextHelper.php b/WordPress/Helpers/ContextHelper.php
index dae6af6755..19994c422c 100644
--- a/WordPress/Helpers/ContextHelper.php
+++ b/WordPress/Helpers/ContextHelper.php
@@ -48,4 +48,37 @@ public static function has_object_operator_before( File $phpcsFile, $stackPtr )
 
 		return isset( Collections::objectOperators()[ $tokens[ $before ]['code'] ] );
 	}
+
+	/**
+	 * Check if a particular token is prefixed with a namespace.
+	 *
+	 * @internal This will give a false positive if the file is not namespaced and the token is prefixed
+	 * with `namespace\`.
+	 *
+	 * @since 2.1.0
+	 * @since 3.0.0 - Moved from the Sniff class to this class.
+	 *              - The method visibility was changed from `protected` to `public static`.
+	 *
+	 * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
+	 * @param int                         $stackPtr  The index of the token in the stack.
+	 *
+	 * @return bool
+	 */
+	public static function is_token_namespaced( File $phpcsFile, $stackPtr ) {
+		$tokens = $phpcsFile->getTokens();
+		$prev   = $phpcsFile->findPrevious( Tokens::$emptyTokens, ( $stackPtr - 1 ), null, true );
+
+		if ( \T_NS_SEPARATOR !== $tokens[ $prev ]['code'] ) {
+			return false;
+		}
+
+		$before_prev = $phpcsFile->findPrevious( Tokens::$emptyTokens, ( $prev - 1 ), null, true );
+		if ( \T_STRING !== $tokens[ $before_prev ]['code']
+			&& \T_NAMESPACE !== $tokens[ $before_prev ]['code']
+		) {
+			return false;
+		}
+
+		return true;
+	}
 }
diff --git a/WordPress/Sniff.php b/WordPress/Sniff.php
index 90366447b8..fbd654b9c2 100644
--- a/WordPress/Sniff.php
+++ b/WordPress/Sniff.php
@@ -508,43 +508,6 @@ protected function is_in_isset_or_empty( $stackPtr ) {
 		return false;
 	}
 
-	/**
-	 * Check if a particular token is prefixed with a namespace.
-	 *
-	 * @internal This will give a false positive if the file is not namespaced and the token is prefixed
-	 * with `namespace\`.
-	 *
-	 * @since 2.1.0
-	 *
-	 * @param int $stackPtr The index of the token in the stack.
-	 *
-	 * @return bool
-	 */
-	protected function is_token_namespaced( $stackPtr ) {
-		$prev = $this->phpcsFile->findPrevious( Tokens::$emptyTokens, ( $stackPtr - 1 ), null, true, null, true );
-
-		if ( false === $prev ) {
-			return false;
-		}
-
-		if ( \T_NS_SEPARATOR !== $this->tokens[ $prev ]['code'] ) {
-			return false;
-		}
-
-		$before_prev = $this->phpcsFile->findPrevious( Tokens::$emptyTokens, ( $prev - 1 ), null, true, null, true );
-		if ( false === $before_prev ) {
-			return false;
-		}
-
-		if ( \T_STRING !== $this->tokens[ $before_prev ]['code']
-			&& \T_NAMESPACE !== $this->tokens[ $before_prev ]['code']
-		) {
-			return false;
-		}
-
-		return true;
-	}
-
 	/**
 	 * Check if a token is (part of) a parameter for a function call to a select list of functions.
 	 *
@@ -614,7 +577,7 @@ protected function is_in_function_call( $stackPtr, $valid_functions, $global_fun
 				continue;
 			}
 
-			if ( $this->is_token_namespaced( $prev_non_empty ) === true ) {
+			if ( ContextHelper::is_token_namespaced( $this->phpcsFile, $prev_non_empty ) === true ) {
 				continue;
 			}
 
@@ -1004,7 +967,7 @@ protected function is_validated( $stackPtr, $array_keys = array(), $in_condition
 						continue 2;
 					}
 
-					if ( $this->is_token_namespaced( $i ) === true ) {
+					if ( ContextHelper::is_token_namespaced( $this->phpcsFile, $i ) === true ) {
 						// Namespaced function call.
 						continue 2;
 					}
@@ -1180,7 +1143,7 @@ public function is_use_of_global_constant( $stackPtr ) {
 			return false;
 		}
 
-		if ( $this->is_token_namespaced( $stackPtr ) === true ) {
+		if ( ContextHelper::is_token_namespaced( $this->phpcsFile, $stackPtr ) === true ) {
 			// Namespaced constant of the same name.
 			return false;
 		}
diff --git a/WordPress/Sniffs/Security/NonceVerificationSniff.php b/WordPress/Sniffs/Security/NonceVerificationSniff.php
index 7bc5ecdb9d..957e1eebdc 100644
--- a/WordPress/Sniffs/Security/NonceVerificationSniff.php
+++ b/WordPress/Sniffs/Security/NonceVerificationSniff.php
@@ -274,7 +274,7 @@ private function has_nonce_check( $stackPtr ) {
 					continue;
 				}
 
-				if ( $this->is_token_namespaced( $i ) === true ) {
+				if ( ContextHelper::is_token_namespaced( $this->phpcsFile, $i ) === true ) {
 					continue;
 				}
 
diff --git a/WordPress/Sniffs/WP/DiscouragedConstantsSniff.php b/WordPress/Sniffs/WP/DiscouragedConstantsSniff.php
index 729272ece0..4d6bb403a1 100644
--- a/WordPress/Sniffs/WP/DiscouragedConstantsSniff.php
+++ b/WordPress/Sniffs/WP/DiscouragedConstantsSniff.php
@@ -9,13 +9,14 @@
 
 namespace WordPressCS\WordPress\Sniffs\WP;
 
-use WordPressCS\WordPress\AbstractFunctionParameterSniff;
 use PHP_CodeSniffer\Util\Tokens;
 use PHPCSUtils\Tokens\Collections;
 use PHPCSUtils\Utils\MessageHelper;
 use PHPCSUtils\Utils\PassedParameters;
 use PHPCSUtils\Utils\Scopes;
 use PHPCSUtils\Utils\TextStrings;
+use WordPressCS\WordPress\AbstractFunctionParameterSniff;
+use WordPressCS\WordPress\Helpers\ContextHelper;
 
 /**
  * Warns against usage of discouraged WP CONSTANTS and recommends alternatives.
@@ -140,7 +141,7 @@ public function process_arbitrary_tstring( $stackPtr ) {
 			return;
 		}
 
-		if ( $this->is_token_namespaced( $stackPtr ) === true ) {
+		if ( ContextHelper::is_token_namespaced( $this->phpcsFile, $stackPtr ) === true ) {
 			// Namespaced constant of the same name.
 			return;
 		}
diff --git a/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.inc b/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.inc
index 2693377ea4..62b8a3678c 100644
--- a/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.inc
+++ b/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.inc
@@ -11,3 +11,10 @@ wp_reset_query(); // Warning, use wp_reset_postdata instead.
 $obj->query_posts(); // OK, not the global function.
 MyClass::wp_reset_query(); // OK, not the global function.
 $obj?->query_posts(); // OK, not the global function.
+
+// Ensure the sniff doesn't act on namespaced calls.
+MyNamespace\query_posts(); // OK, not the global function.
+namespace\query_posts(); // OK, not the global function.
+
+// ... but does act on fully qualified function calls.
+\query_posts(); // Warning.
diff --git a/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.php b/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.php
index d30f11cc10..4b46ca0933 100644
--- a/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.php
+++ b/WordPress/Tests/WP/DiscouragedFunctionsUnitTest.php
@@ -21,6 +21,7 @@
  *
  * @covers \WordPressCS\WordPress\AbstractFunctionRestrictionsSniff
  * @covers \WordPressCS\WordPress\Helpers\ContextHelper::has_object_operator_before
+ * @covers \WordPressCS\WordPress\Helpers\ContextHelper::is_token_namespaced
  * @covers \WordPressCS\WordPress\Sniffs\WP\DiscouragedFunctionsSniff
  */
 final class DiscouragedFunctionsUnitTest extends AbstractSniffUnitTest {
@@ -41,8 +42,9 @@ public function getErrorList() {
 	 */
 	public function getWarningList() {
 		return array(
-			3 => 1,
-			4 => 1,
+			3  => 1,
+			4  => 1,
+			20 => 1,
 		);
 	}
 }