diff --git a/tests/Type/WebMozartAssert/data/bug-68.php b/tests/Type/WebMozartAssert/data/bug-68.php
index ba7972e..da65ca0 100644
--- a/tests/Type/WebMozartAssert/data/bug-68.php
+++ b/tests/Type/WebMozartAssert/data/bug-68.php
@@ -6,7 +6,8 @@
 
 use Webmozart\Assert\Assert;
 
-$encryptedValue = "some value";
+/** @var string $encryptedValue */
+$encryptedValue = doFoo();
 $valueParts = explode(':', $encryptedValue);
 
 Assert::count(