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-rw-r--r--tests/helper.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/helper.php b/tests/helper.php
index e0f0381..680b359 100644
--- a/tests/helper.php
+++ b/tests/helper.php
@@ -83,7 +83,7 @@ class qtype_algebra_test_helper extends question_test_helper {
$qdata->options->nchecks = '10';
$qdata->options->tolerance = 0.001;
$qdata->options->disallow = '';
- $qdata->options->allowedfuncs = '';
+ $qdata->options->allowedfuncs = array();
$qdata->options->answerprefix = '';
$qdata->options->answers = array(
13 => new question_answer(13, '7*x', 1.0, 'This is a very good answer.', FORMAT_HTML),