[ruff UP031] Fix to use format specifiers instead of percent format

testing/python/collect.py

@@ -36,9 +36,9 @@ class TestModule:
             [
                 "*import*mismatch*",
                 "*imported*test_whatever*",
-                "*%s*" % p1,
+                f"*{p1}*",
                 "*not the same*",
-                "*%s*" % p2,
+                f"*{p2}*",
                 "*HINT*",
             ]
         )

testing/python/fixtures.py

@@ -2268,18 +2268,17 @@ class TestFixtureMarker:
         This was a regression introduced in the fix for #736.
         """
         pytester.makepyfile(
-            """
+            f"""
             import pytest
 
             @pytest.fixture(params=[1, 2])
             def fixt(request):
                 return request.param
 
-            @pytest.mark.parametrize(%s, [(3, 'x'), (4, 'x')])
+            @pytest.mark.parametrize({param_args}, [(3, 'x'), (4, 'x')])
             def test_foo(fixt, val):
                 pass
         """
-            % param_args
         )
         reprec = pytester.inline_run()
         reprec.assertoutcome(passed=2)