only pytest 7 is supported by python 3.7

pyproject.toml

@@ -22,10 +22,10 @@ classifiers=[
 
 [project.optional-dependencies]
 testing = [
-    "pytest>=8.0",
+    "pytest>=7.0",
     "requests>=2.0",
     # For Python 3.9 and up, use pytest-cov>=6.0
     'pytest-cov>=6.0; python_version >= "3.9"',
     # For older versions, use an older version of pytest-cov or omit it:
-    'pytest-cov; python_version < "3.9"' # we take any we get 
+    'pytest-cov; python_version < "3.9"' # we take any we get
 ]
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