diff --git a/includes/Context.php b/includes/Context.php
index e0deb20504c..5066da0e73d 100644
--- a/includes/Context.php
+++ b/includes/Context.php
@@ -156,7 +156,7 @@ public function get_reference_site_url() {
 			$site_url = $orig_site_url;
 		}
 
-		return $site_url;
+		return untrailingslashit( $site_url );
 	}
 
 	/**
@@ -169,8 +169,8 @@ public function get_reference_site_url() {
 	 * @return string|false The reference permalink URL or false if post does not exist.
 	 */
 	public function get_reference_permalink( $post = 0 ) {
-		$reference_site_url = untrailingslashit( $this->get_reference_site_url() );
-		$orig_site_url      = untrailingslashit( home_url() );
+		$reference_site_url = $this->get_reference_site_url();
+		$orig_site_url      = home_url();
 
 		// Gets post object. On front area we need to use get_queried_object to get the current post object.
 		if ( ! $post ) {
diff --git a/includes/Core/REST_API/REST_Routes.php b/includes/Core/REST_API/REST_Routes.php
index ecf420fc70c..84b99a0be1a 100644
--- a/includes/Core/REST_API/REST_Routes.php
+++ b/includes/Core/REST_API/REST_Routes.php
@@ -519,8 +519,8 @@ function( $dataset ) use ( $module ) {
 							if ( filter_var( $query, FILTER_VALIDATE_URL ) ) {
 								// Translate public/alternate reference URLs to local if different.
 								$query_url = str_replace(
-									trailingslashit( $this->context->get_reference_site_url() ),
-									trailingslashit( home_url() ),
+									$this->context->get_reference_site_url(),
+									home_url(),
 									$query
 								);
 								$post_id = url_to_postid( $query_url );
diff --git a/includes/Modules/Analytics.php b/includes/Modules/Analytics.php
index 2c06b858eba..528c231ee24 100644
--- a/includes/Modules/Analytics.php
+++ b/includes/Modules/Analytics.php
@@ -1005,7 +1005,7 @@ function ( \Google_Service_Analytics_Account $account ) {
 					}
 
 					$found_property = new \Google_Service_Analytics_Webproperty();
-					$current_url    = untrailingslashit( $this->context->get_reference_site_url() );
+					$current_url    = $this->context->get_reference_site_url();
 
 					// If requested for a specific property, only match by property ID.
 					if ( ! empty( $data['existingPropertyId'] ) ) {
diff --git a/tests/phpunit/integration/ContextTest.php b/tests/phpunit/integration/ContextTest.php
index a034116a991..4a87dcf706b 100644
--- a/tests/phpunit/integration/ContextTest.php
+++ b/tests/phpunit/integration/ContextTest.php
@@ -108,6 +108,15 @@ public function test_get_reference_site_url() {
 		$this->assertEquals( 'https://test.com', $context->get_reference_site_url() );
 		remove_filter( 'googlesitekit_site_url', $other_url_filter );
 
+		$trailing_slash_url = function () {
+			return 'https://test.com/';
+		};
+
+		// It always returns a URL without a trailing slash.
+		add_filter( 'googlesitekit_site_url', $trailing_slash_url );
+		$this->assertEquals( 'https://test.com', $context->get_reference_site_url() );
+		remove_filter( 'googlesitekit_site_url', $trailing_slash_url );
+
 		// If the filtered value returns an empty value, it falls back to the home_url.
 		add_filter( 'googlesitekit_site_url', '__return_empty_string' );
 		$this->assertEquals( $home_url, $context->get_reference_site_url() );