diff --git a/tests/AesBase.php b/tests/AesBase.php
index <HASH>..<HASH> 100644
--- a/tests/AesBase.php
+++ b/tests/AesBase.php
@@ -56,7 +56,7 @@ class AesBase extends \PHPUnit\Framework\TestCase
         $testname1 = strtolower(str_replace('-', '', static::$class::CIPHER));
         $testname2 = strtolower(static::$class);
 
-        $this->assertContains($testname1, $testname2);
+        $this->asserEquals($testname1, $testname2);
     }
 
     public function testKnownVector()
( ͡~ ͜ʖ ͡°) another attempt at fixing unit test...