diff --git a/tests/speedy-helpers.js b/tests/speedy-helpers.js
index 8e91a103..989a7e8f 100644
--- a/tests/speedy-helpers.js
+++ b/tests/speedy-helpers.js
@@ -642,4 +642,7 @@ window.addEventListener('load', () => {
     header('Speedy testing!');
     const msg = `Results are available for visual inspection.`;
     print(msg);
-});
\ No newline at end of file
+});
+
+// run test sequentially
+jasmine.getEnv().configure({ random: false });
\ No newline at end of file