diff --git a/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderDisableInteractionsTest.php b/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderDisableInteractionsTest.php
index 8b482a0dae..a486f9ea9f 100644
--- a/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderDisableInteractionsTest.php
+++ b/core/modules/layout_builder/tests/src/FunctionalJavascript/LayoutBuilderDisableInteractionsTest.php
@@ -237,7 +237,7 @@ protected function assertContextualLinkRetainsMouseup() {
     $this->assertNotEmpty($body_block);
 
     // Get the current Y position of the body block.
-    $body_block_top_position = $this->getElementVerticalPosition($body_field_selector);
+    $body_block_top_position = $this->getElementVerticalPosition($body_field_selector, 'top');
 
     $body_block_contextual_link_button = $body_block->find('css', '.trigger');
     $this->assertNotEmpty($body_block_contextual_link_button);
@@ -261,7 +261,7 @@ protected function assertContextualLinkRetainsMouseup() {
     $this->movePointerTo('#iframe-that-should-be-disabled');
 
     $new_body_block_bottom_position = $this->getElementVerticalPosition($body_field_selector, 'bottom');
-    $iframe_top_position = $this->getElementVerticalPosition('#iframe-that-should-be-disabled');
+    $iframe_top_position = $this->getElementVerticalPosition('#iframe-that-should-be-disabled', 'top');
 
     $minimum_distance_mouse_moved = $iframe_top_position - $new_body_block_bottom_position;
     $this->assertGreaterThan(200, $minimum_distance_mouse_moved, 'The mouse moved at least 200 pixels');
@@ -270,7 +270,7 @@ protected function assertContextualLinkRetainsMouseup() {
     // position as it was when $body_block_y_position was declared. It will have
     // moved slightly because the current block being configured will have a
     // border that was not present when the dialog was not open.
-    $new_body_block_top_position = $this->getElementVerticalPosition($body_field_selector);
+    $new_body_block_top_position = $this->getElementVerticalPosition($body_field_selector, 'top');
     $distance_body_block_moved = abs($body_block_top_position - $new_body_block_top_position);
     // Confirm that body moved only slightly compared to the distance the mouse
     // moved and therefore was not dragged when the mouse moved.
@@ -288,7 +288,7 @@ protected function assertContextualLinkRetainsMouseup() {
    * @return int
    *   The element position.
    */
-  protected function getElementVerticalPosition($css_selector, $position_type = 'top') {
+  protected function getElementVerticalPosition($css_selector, $position_type) {
     $this->assertTrue(in_array($position_type, ['top', 'bottom']), 'Expected position type.');
     return (int) $this->getSession()->evaluateScript("document.querySelector('$css_selector').getBoundingClientRect().$position_type + window.pageYOffset");
   }