Mink can now check that an element does not contain the given HTML

src/Behat/MinkExtension/Context/MinkContext.php

@@ -317,6 +317,16 @@ class MinkContext extends RawMinkContext implements TranslatedContextInterface
         $this->assertSession()->elementContains('css', $element, $this->fixStepArgument($value));
     }
 
+    /**
+     * Checks, that element with specified CSS doesn't contain specified HTML.
+     *
+     * @Then /^the "(?P<element>[^"]*)" element should not contain "(?P<value>(?:[^"]|\\")*)"$/
+     */
+    public function assertElementNotContains($element, $value)
+    {
+        $this->assertSession()->elementNotContains('css', $element, $this->fixStepArgument($value));
+    }
+
     /**
      * Checks, that element with specified CSS exists on page.
      *