diff --git a/lib/tests/other/chartjstestpage.php b/lib/tests/other/chartjstestpage.php
index 6fd89899b74..a95c5049709 100644
--- a/lib/tests/other/chartjstestpage.php
+++ b/lib/tests/other/chartjstestpage.php
@@ -48,13 +48,14 @@ $chart2->set_title('DOUGHNUT CHART');
 $chart2->set_doughnut(true);
 $chart2->add_series($sales);
 $chart2->set_labels($labels);
+$chart2->set_responsive_options(['aspectRatio' => 1, 'maintainAspectRatio' => false]);
 
 $chart3 = new \core\chart_line();
 $chart3->set_title('TENSIONED LINES CHART');
 $chart3->add_series($sales);
 $chart3->add_series($expenses);
 $chart3->set_labels($labels);
-$chart3->set_responsive_options(['aspectRatio' => 2, 'maintainAspectRatio' => true, 'resizeDelay' => 1]);
+$chart3->set_responsive_options(['aspectRatio' => 4, 'maintainAspectRatio' => true, 'resizeDelay' => 2000]);
 
 $chart4 = new \core\chart_line();
 $chart4->set_smooth(true);
@@ -62,12 +63,14 @@ $chart4->set_title('SMOOTH LINES CHART');
 $chart4->add_series($sales);
 $chart4->add_series($expenses);
 $chart4->set_labels($labels);
+$chart4->set_responsive_options(['aspectRatio' => 1, 'maintainAspectRatio' => true]);
 
 $chart5 = new \core\chart_bar();
 $chart5->set_title('BAR CHART');
 $chart5->add_series($sales);
 $chart5->add_series($expenses);
 $chart5->set_labels($labels);
+$chart5->set_responsive_options(['responsive' => false]);
 
 $chart6 = new \core\chart_bar();
 $chart6->set_title('HORIZONTAL BAR CHART');