diff --git a/README.md b/README.md
index 13a6779c..1ab0270b 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 
   <h3 align="center">
    <a href="https://spotlight.renumics.com"><b>Documentation</b></a> &bull;
-   <a href="https://renumics.com/docs/playbook"><b>Playbook</b></a> &bull;
+   <a href="https://renumics.com/docs/data-centric-ai/playbook"><b>Playbook</b></a> &bull;
    <a href="https://renumics.com/blog/"><b>Blog</b></a> &bull;
    <a href="https://renumics.com/api/spotlight/"><b>API Reference</b></a>
  </h3>
diff --git a/tests/ui/test_startpage.py b/tests/ui/test_startpage.py
index 4ba5c722..6f0ba5f0 100644
--- a/tests/ui/test_startpage.py
+++ b/tests/ui/test_startpage.py
@@ -6,6 +6,7 @@
 
 import pytest
 from diffimg import diff
+from PIL import Image
 from selenium.webdriver.remote.webdriver import WebDriver
 
 from .helpers import (
@@ -33,6 +34,15 @@ def take_and_diff_snapshot(
     reference_screenshot_path = old_screenshots_folder / f"{name}-{browser_name}.png"
 
     if reference_screenshot_path.is_file():
+        # make sure both are in the same color mode
+        im1 = Image.open(str(reference_screenshot_path))
+        im2 = Image.open(str(new_screenshot_path))
+        if im1.mode != im2.mode:
+            im1 = im1.convert("RGB")
+            im2 = im2.convert("RGB")
+            im1.save(str(reference_screenshot_path))
+            im2.save(str(new_screenshot_path))
+
         diff_ratio = diff(
             str(reference_screenshot_path),
             str(new_screenshot_path),