diff --git a/api/controller/TestController.php b/api/controller/TestController.php
index ccf2ad7c14532aba5f7381d82fd70df091542845..1f60dada4d8af6cbf1ddcb7a9cdb0dc594ca156b 100644
--- a/api/controller/TestController.php
+++ b/api/controller/TestController.php
@@ -194,7 +194,7 @@ class TestController {
                 $passes = 1;
             } else {
                 $fails = 1;
-                $message = stack_string('default_test_fail');
+                $message = stack_string('defaulttestfail');
             }
         }
 
diff --git a/api/public/bulktest.php b/api/public/bulktest.php
index 08c1b84e63d8719113457a2b6f530bcd47a51348..a50e7f4b48bf7a62d756f09e6bf89844e5b3195e 100644
--- a/api/public/bulktest.php
+++ b/api/public/bulktest.php
@@ -160,7 +160,7 @@ require_login();
                     }
                   }
                   if (!json.istests && json.results[seed].passes == 1) {
-                    resultHtml += '<p class="feedback passed">' + '<?php echo stack_string('default_test_pass')?>' + '</p>';
+                    resultHtml += '<p class="feedback passed">' + '<?php echo stack_string('defaulttestpass')?>' + '</p>';
                   }
                   // Display seed level messages - will be exceptions.
                   if (json.results[seed].messages) {
diff --git a/lang/en/qtype_stack.php b/lang/en/qtype_stack.php
index 7265141ba68dc9d5e6d38613470cbe8092d781c4..072b01484a10fe381de5408786bfb6e65310549e 100644
--- a/lang/en/qtype_stack.php
+++ b/lang/en/qtype_stack.php
@@ -1530,8 +1530,6 @@ $string['castext_error_unevaluated'] = 'This text content was never evaluated.';
 
 
 
-$string['default_test_fail'] = 'Default test using the model answers does not return a score of 1.';
-$string['default_test_pass'] = 'Default test using the model answers returns a score of 1.';
 // API strings.
 $string['api_choose_file'] = 'Please select a question file';
 $string['api_choose_folder'] = 'Choose a STACK folder';