diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 4f7313e6b..9238694c3 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -1419,7 +1419,7 @@ class Metafunc:
                     actual_param_count = len(argnames)
 
                     fail(
-                        f"In function {self.function.__name__}: {argnames} is not a valid parameter. "
+                        f"In function {self.function.__name__}: {argnames} is not a valid parameter. \n"
                         f"Expected {expected_param_count} sub parameters, "
                         f"but only {actual_param_count} were provided. \n\n"
                         f"Make sure to pass parameter names as strings without quotes, separated by commas, \n "
diff --git a/testing/test_mark.py b/testing/test_mark.py
index 46bbf58a7..f9eee67cc 100644
--- a/testing/test_mark.py
+++ b/testing/test_mark.py
@@ -421,8 +421,8 @@ def test_parametrized_collect_with_wrong_format(pytester: Pytester) -> None:
     result = pytester.runpytest(py_file)
     result.stdout.fnmatch_lines(
         [
-            """In function test_parametrization: ['arg1'] is not a valid parameter.
-               Expected 2 sub parameters, but only 1 were provided. """,
+            "In function test_parametrization: ['arg1'] is not a valid parameter. ",
+            "Expected 2 sub parameters, but only 1 were provided. ",
             "",
             "Make sure to pass parameter names as strings without quotes, separated by commas, ",
             " e.g., '@pytest.mark.parametrize(\"arg1\", <Input Values>)'",