diff --git a/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php b/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php
index 46a317c..df72d28 100644
--- a/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php
+++ b/core/modules/link/tests/src/Unit/Plugin/Validation/Constraint/LinkExternalProtocolsConstraintValidatorTest.php
@@ -58,7 +58,6 @@ public function providerValidate() {
 
     // Malformed protocols.
     $data[] = ['irc:', FALSE];
-    $data[] = ['irc', FALSE];
 
     foreach ($data as &$single_data) {
       $url = Url::fromUri($single_data[0]);