MNT skip test_min_dependencies_readme on PyPy (scikit-learn#20299)

Author: ogrisel

sklearn/tests/test_min_dependencies_readme.py

@@ -3,6 +3,7 @@
 
 import os
 import re
+import platform
 from pathlib import Path
 
 import pytest
@@ -16,6 +17,9 @@ def test_min_dependencies_readme():
     # consistent with the minimum dependencies defined at the file:
     # sklearn/_min_dependencies.py
 
+    if platform.python_implementation() == "PyPy":
+        pytest.skip("PyPy does not always share the same minimum deps")
+
     pattern = re.compile(
         r"(\.\. \|)"
         + r"(([A-Za-z]+\-?)+)"