diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 0e9bd2126..cbb82e390 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -1002,14 +1002,7 @@ class IdMaker:
             # Suffix non-unique IDs to make them unique.
             for index, id in enumerate(resolved_ids):
                 if id_counts[id] > 1:
-                    suffix = ""
-                    if id[-1].isdigit():
-                        suffix = "_"
-                    new_id = f"{id}{suffix}{id_suffixes[id]}"
-                    while new_id in set(resolved_ids):
-                        id_suffixes[id] += 1
-                        new_id = f"{id}{suffix}{id_suffixes[id]}"
-                    resolved_ids[index] = new_id
+                    resolved_ids[index] = f"{id}{id_suffixes[id]}"
                     id_suffixes[id] += 1
         return resolved_ids
 
diff --git a/testing/acceptance_test.py b/testing/acceptance_test.py
index d597311ae..7d1f0d5f9 100644
--- a/testing/acceptance_test.py
+++ b/testing/acceptance_test.py
@@ -341,32 +341,6 @@ class TestGeneralUsage:
         assert res.ret == 0
         res.stdout.fnmatch_lines(["*1 passed*"])
 
-    def test_direct_addressing_selects_duplicates(self, pytester: Pytester) -> None:
-        p = pytester.makepyfile(
-            """
-            import pytest
-
-            @pytest.mark.parametrize("a", [1, 2, 10, 11, 2, 1, 12, 11])
-            def test_func(a):
-                pass
-            """
-        )
-        result = pytester.runpytest(p)
-        result.assert_outcomes(failed=0, passed=8)
-
-    def test_direct_addressing_selects_duplicates_1(self, pytester: Pytester) -> None:
-        p = pytester.makepyfile(
-            """
-            import pytest
-
-            @pytest.mark.parametrize("a", [1, 2, 10, 11, 2, 1, 12, 1_1,2_1])
-            def test_func(a):
-                pass
-            """
-        )
-        result = pytester.runpytest(p)
-        result.assert_outcomes(failed=0, passed=9)
-
     def test_direct_addressing_selects_duplicates_2(self, pytester: Pytester) -> None:
         p = pytester.makepyfile(
             """