diff --git a/tests/Integration/WP_MockTest.php b/tests/Integration/WP_MockTest.php
index 04461fb..8b23319 100644
--- a/tests/Integration/WP_MockTest.php
+++ b/tests/Integration/WP_MockTest.php
@@ -175,7 +175,7 @@ public function testMockingOverridesDefaults(): void
      */
     public function testBotchedMocksStillOverridesDefault(): void
     {
-        WP_Mock::userFunction('esc_html');
+        WP_Mock::userFunction('esc_html')->andReturn('');
 
         /** @phpstan-ignore-next-line function "exists" */
         $this->assertEmpty(esc_html('Input'));