diff --git a/.github/workflows/pythonapp.yml b/.github/workflows/pythonapp.yml
index d4043585cc..b8b73907d4 100644
--- a/.github/workflows/pythonapp.yml
+++ b/.github/workflows/pythonapp.yml
@@ -70,10 +70,10 @@ jobs:
         maximum-size: 16GB
         disk-root: "D:"
     - uses: actions/checkout@v4
-    - name: Set up Python 3.8
+    - name: Set up Python 3.9
       uses: actions/setup-python@v5
       with:
-        python-version: '3.8'
+        python-version: '3.9'
     - name: Prepare pip wheel
       run: |
         which python
diff --git a/tests/test_clip_intensity_percentilesd.py b/tests/test_clip_intensity_percentilesd.py
index fa727b6adb..ed4fc588cb 100644
--- a/tests/test_clip_intensity_percentilesd.py
+++ b/tests/test_clip_intensity_percentilesd.py
@@ -96,7 +96,7 @@ def test_channel_wise(self, p):
         for i, c in enumerate(im):
             lower, upper = percentile(c, (5, 95))
             expected = clip(c, lower, upper)
-            assert_allclose(result[key][i], p(expected), type_test="tensor", rtol=1e-4, atol=0)
+            assert_allclose(result[key][i], p(expected), type_test="tensor", rtol=1e-3, atol=0)
 
     def test_ill_sharpness_factor(self):
         key = "img"