diff --git a/pandas/core/algorithms.py b/pandas/core/algorithms.py
index 5783842e9ddef..e0340f99b92e1 100644
--- a/pandas/core/algorithms.py
+++ b/pandas/core/algorithms.py
@@ -470,12 +470,12 @@ def isin(comps: ListLike, values: ListLike) -> npt.NDArray[np.bool_]:
     if not is_list_like(comps):
         raise TypeError(
             "only list-like objects are allowed to be passed "
-            f"to isin(), you passed a [{type(comps).__name__}]"
+            f"to isin(), you passed a `{type(comps).__name__}`"
         )
     if not is_list_like(values):
         raise TypeError(
             "only list-like objects are allowed to be passed "
-            f"to isin(), you passed a [{type(values).__name__}]"
+            f"to isin(), you passed a `{type(values).__name__}`"
         )
 
     if not isinstance(values, (ABCIndex, ABCSeries, ABCExtensionArray, np.ndarray)):
diff --git a/pandas/core/arrays/categorical.py b/pandas/core/arrays/categorical.py
index 8898379689cfd..46e2b64cb60c6 100644
--- a/pandas/core/arrays/categorical.py
+++ b/pandas/core/arrays/categorical.py
@@ -2581,7 +2581,7 @@ def isin(self, values) -> npt.NDArray[np.bool_]:
             values_type = type(values).__name__
             raise TypeError(
                 "only list-like objects are allowed to be passed "
-                f"to isin(), you passed a [{values_type}]"
+                f"to isin(), you passed a `{values_type}`"
             )
         values = sanitize_array(values, None, None)
         null_mask = np.asarray(isna(values))
diff --git a/pandas/tests/computation/test_eval.py b/pandas/tests/computation/test_eval.py
index 35960c707d3bd..e6e1363603e09 100644
--- a/pandas/tests/computation/test_eval.py
+++ b/pandas/tests/computation/test_eval.py
@@ -158,7 +158,7 @@ def test_simple_cmp_ops(self, cmp_op, lhs, rhs, engine, parser):
             [
                 r"only list-like( or dict-like)? objects are allowed to be "
                 r"passed to (DataFrame\.)?isin\(\), you passed a "
-                r"(\[|')bool(\]|')",
+                r"(`|')bool(`|')",
                 "argument of type 'bool' is not iterable",
             ]
         )
@@ -203,7 +203,7 @@ def test_compound_invert_op(self, op, lhs, rhs, request, engine, parser):
             [
                 r"only list-like( or dict-like)? objects are allowed to be "
                 r"passed to (DataFrame\.)?isin\(\), you passed a "
-                r"(\[|')float(\]|')",
+                r"(`|')float(`|')",
                 "argument of type 'float' is not iterable",
             ]
         )
diff --git a/pandas/tests/series/methods/test_isin.py b/pandas/tests/series/methods/test_isin.py
index 3e4857b7abf38..4ea2fbf51afc9 100644
--- a/pandas/tests/series/methods/test_isin.py
+++ b/pandas/tests/series/methods/test_isin.py
@@ -34,7 +34,7 @@ def test_isin_with_string_scalar(self):
         s = Series(["A", "B", "C", "a", "B", "B", "A", "C"])
         msg = (
             r"only list-like objects are allowed to be passed to isin\(\), "
-            r"you passed a \[str\]"
+            r"you passed a `str`"
         )
         with pytest.raises(TypeError, match=msg):
             s.isin("a")
diff --git a/pandas/tests/test_algos.py b/pandas/tests/test_algos.py
index 8c26bbd209a6a..34a0bee877664 100644
--- a/pandas/tests/test_algos.py
+++ b/pandas/tests/test_algos.py
@@ -888,7 +888,7 @@ class TestIsin:
     def test_invalid(self):
         msg = (
             r"only list-like objects are allowed to be passed to isin\(\), "
-            r"you passed a \[int\]"
+            r"you passed a `int`"
         )
         with pytest.raises(TypeError, match=msg):
             algos.isin(1, 1)