diff --git a/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.inc b/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.inc
index 72bffe2c4c..98159b4725 100644
--- a/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.inc
+++ b/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.inc
@@ -8,3 +8,9 @@ if (@in_array($array, $needle))
 }
 
 $hasValue = @in_array(haystack: $array, needle: $needle);
+
+// phpcs:set Generic.PHP.NoSilencedErrors error true
+$fileContent = @file_get_contents('non_existent_file.txt');
+// phpcs:set Generic.PHP.NoSilencedErrors error false
+
+echo @$undefinedVariable;
diff --git a/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.php b/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.php
index dc7e754d51..43f762812b 100644
--- a/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.php
+++ b/src/Standards/Generic/Tests/PHP/NoSilencedErrorsUnitTest.php
@@ -30,7 +30,7 @@ class NoSilencedErrorsUnitTest extends AbstractSniffUnitTest
      */
     public function getErrorList()
     {
-        return [];
+        return [13 => 1];
 
     }//end getErrorList()
 
@@ -48,6 +48,7 @@ public function getWarningList()
         return [
             5  => 1,
             10 => 1,
+            16 => 1,
         ];
 
     }//end getWarningList()