diff --git a/src/Framework/Constraint/StringEndsWith.php b/src/Framework/Constraint/StringEndsWith.php
index d6118f69e4a..3856078e816 100644
--- a/src/Framework/Constraint/StringEndsWith.php
+++ b/src/Framework/Constraint/StringEndsWith.php
@@ -43,6 +43,6 @@ public function toString(): string
      */
     protected function matches($other): bool
     {
-        return \substr($other, 0 - \strlen($this->suffix)) == $this->suffix;
+        return \substr($other, 0 - \strlen($this->suffix)) === $this->suffix;
     }
 }