Enable testcafe dev mode to pinpoint testcafe errors

docker-compose.testcafe.yml

@@ -3,6 +3,8 @@ services:
   testcafe:
     build: tests/
     working_dir: /project/tests
+    command:
+      - --dev
     # Run as root to have the right to access /var/run/docker.sock
     user: root
     environment:

tests/tests/variables.ts

@@ -154,7 +154,11 @@ test("Test that variables storage works", async (t: TestController) => {
 }).after(async t => {
     if (!t.ctx.passed) {
         console.log("Test failed. Browser logs:")
-        console.log(await t.getBrowserConsoleMessages());
+        try {
+            console.log(await t.getBrowserConsoleMessages());
+        } catch (e) {
+            console.error('Error while fetching browser logs (maybe linked to a closed iframe?)', e);
+        }
     }
 });