diff --git a/questiontestrun.php b/questiontestrun.php
index 8f0259292e841db10db0faf6dc8dbfb94dc4e6ee..1ceec928f098cc94e85282290366d415d4e38f68 100644
--- a/questiontestrun.php
+++ b/questiontestrun.php
@@ -203,10 +203,12 @@ if (empty($testscases) && $canedit) {
 }
 
 if (empty($testscases)) {
+    echo "\n<hr/>\n";
     $defaulttest = stack_bulk_tester::create_default_test($question);
     $defaulttestresult = $defaulttest->test_question($questionid, $seed, $context);
     echo stack_string('runquestiontests_explanation');
     echo $defaulttestresult->html_output($question, stack_string('runquestiontests_example'));
+    echo "\n<hr/>\n";
 }
 
 $deployfeedback = optional_param('deployfeedback', null, PARAM_TEXT);
diff --git a/stack/bulktester.class.php b/stack/bulktester.class.php
index b9152c5e84f1ac2d7834fd722230afcf0cf45516..83c91487d886f0ee50deba680f0efe4508554413 100644
--- a/stack/bulktester.class.php
+++ b/stack/bulktester.class.php
@@ -451,7 +451,7 @@ class stack_bulk_tester {
         }
 
         if (!$tests) {
-            $defaulttest = stack_bulk_tester::create_default_test($question);
+            $defaulttest = self::create_default_test($question);
             $defaulttestresult = $defaulttest->test_question($qid, $seed, $context);
             if ($defaulttestresult->passed()) {
                 $ok = true;
diff --git a/stack/cas/parsingrules/033_no_extra_evaluation.filter.php b/stack/cas/parsingrules/033_no_extra_evaluation.filter.php
index 9f6061144f91f1df1a6c27017c4c690f6866a47e..6bbd683bf9a318a453b3e3937c53f29aeb0d3594 100644
--- a/stack/cas/parsingrules/033_no_extra_evaluation.filter.php
+++ b/stack/cas/parsingrules/033_no_extra_evaluation.filter.php
@@ -25,15 +25,14 @@ class stack_ast_filter_033_no_extra_evaluation implements stack_cas_astfilter {
     public function filter(MP_Node $ast, array &$errors, array &$answernotes, stack_cas_security $identifierrules): MP_Node {
 
         $process = function($node) use (&$errors, &$answernotes) {
-            if ($node instanceof MP_PrefixOp &&
-                $node->op === "''") {
-                    $node->position['invalid'] = true;
-                    if (array_search('Illegal_extraevaluation', $answernotes) === false) {
-                        $answernotes[] = 'Illegal_extraevaluation';
-                        $errors[] = stack_string('Illegal_extraevaluation');
-                    }
+            if ($node instanceof MP_PrefixOp && $node->op === "''") {
+                $node->position['invalid'] = true;
+                if (array_search('Illegal_extraevaluation', $answernotes) === false) {
                     $answernotes[] = 'Illegal_extraevaluation';
+                    $errors[] = stack_string('Illegal_extraevaluation');
                 }
+                $answernotes[] = 'Illegal_extraevaluation';
+            }
             return true;
         };
         $ast->callbackRecurse($process);
diff --git a/tests/castext_test.php b/tests/castext_test.php
index 11f2ab97da009d17ed39d282773942f69eddb085..89c22f15420aa03d66996798ac307e32b10c094a 100644
--- a/tests/castext_test.php
+++ b/tests/castext_test.php
@@ -842,7 +842,7 @@ class castext_test extends qtype_stack_testcase {
         $cs2->add_statement($at1);
         $cs2->instantiate();
 
-        $this->assertEquals('\({3\cdot x^2}\), \({-4.000}\), \({-4.000}\), \({3}\), \({1}\)', 
+        $this->assertEquals('\({3\cdot x^2}\), \({-4.000}\), \({-4.000}\), \({3}\), \({1}\)',
             $at1->get_rendered());
     }