diff --git a/src/openforms/tests/e2e/test_file_upload.py b/src/openforms/tests/e2e/test_file_upload.py
index 9d9d44624c..07ba269e36 100644
--- a/src/openforms/tests/e2e/test_file_upload.py
+++ b/src/openforms/tests/e2e/test_file_upload.py
@@ -68,6 +68,13 @@ def setUpTestData():
                 await expect(uploaded_file).to_be_visible()
 
                 await page.get_by_role("button", name="Volgende").click()
+
+                # Debugging to understand what is going on in flaky test
+                summary_page_header = page.get_by_text("Controleer en bevestig")
+                await expect(summary_page_header).to_be_visible()
+                error_page_header = page.get_by_text("Oeps!")
+                await expect(error_page_header).not_to_be_visible()
+
                 await page.get_by_role("button", name="Verzenden").click()
                 await expect(
                     page.get_by_text("Een moment geduld", exact=False)