diff --git a/pytorch_lightning/utilities/argparse.py b/pytorch_lightning/utilities/argparse.py
index 9edc71997f..6f91397bd0 100644
--- a/pytorch_lightning/utilities/argparse.py
+++ b/pytorch_lightning/utilities/argparse.py
@@ -17,7 +17,7 @@ from argparse import _ArgumentGroup, ArgumentParser, Namespace
 from contextlib import suppress
 from typing import Any, Dict, List, Tuple, Union
 
-from pytorch_lightning.utilities.parsing import str_to_bool, str_to_bool_or_str, str_to_bool_or_int
+from pytorch_lightning.utilities.parsing import str_to_bool, str_to_bool_or_int, str_to_bool_or_str
 
 
 def from_argparse_args(cls, args: Union[Namespace, ArgumentParser], **kwargs):
diff --git a/tests/trainer/test_trainer_cli.py b/tests/trainer/test_trainer_cli.py
index a26883e897..d5153e6b82 100644
--- a/tests/trainer/test_trainer_cli.py
+++ b/tests/trainer/test_trainer_cli.py
@@ -176,12 +176,14 @@ def test_argparse_args_parsing(cli_args, expected):
 
 
 @RunIf(min_python="3.7.0")
-@pytest.mark.parametrize('cli_args,expected', [
-    ('', False),
-    ('--fast_dev_run=0', False),
-    ('--fast_dev_run=True', True),
-    ('--fast_dev_run 2', 2),
-])
+@pytest.mark.parametrize(
+    'cli_args,expected', [
+        ('', False),
+        ('--fast_dev_run=0', False),
+        ('--fast_dev_run=True', True),
+        ('--fast_dev_run 2', 2),
+    ]
+)
 def test_argparse_args_parsing_fast_dev_run(cli_args, expected):
     """Test multi type argument with bool."""
     cli_args = cli_args.split(' ') if cli_args else []
diff --git a/tests/utilities/test_parsing.py b/tests/utilities/test_parsing.py
index 57e49df2df..f50f44cf10 100644
--- a/tests/utilities/test_parsing.py
+++ b/tests/utilities/test_parsing.py
@@ -28,6 +28,7 @@ from pytorch_lightning.utilities.parsing import (
     lightning_setattr,
     parse_class_init_keys,
     str_to_bool,
+    str_to_bool_or_int,
     str_to_bool_or_str,
 )
 
@@ -165,7 +166,7 @@ def test_lightning_setattr(tmpdir, model_cases):
             lightning_setattr(m, "this_attr_not_exist", None)
 
 
-def test_str_to_bool_or_str(tmpdir):
+def test_str_to_bool_or_str():
     true_cases = ['y', 'yes', 't', 'true', 'on', '1']
     false_cases = ['n', 'no', 'f', 'false', 'off', '0']
     other_cases = ['yyeess', 'noooo', 'lightning']
@@ -180,7 +181,7 @@ def test_str_to_bool_or_str(tmpdir):
         assert str_to_bool_or_str(case) == case
 
 
-def test_str_to_bool(tmpdir):
+def test_str_to_bool():
     true_cases = ['y', 'yes', 't', 'true', 'on', '1']
     false_cases = ['n', 'no', 'f', 'false', 'off', '0']
     other_cases = ['yyeess', 'noooo', 'lightning']
@@ -196,6 +197,14 @@ def test_str_to_bool(tmpdir):
             str_to_bool(case)
 
 
+def test_str_to_bool_or_int():
+    assert str_to_bool_or_int("0") is False
+    assert str_to_bool_or_int("1") is True
+    assert str_to_bool_or_int("true") is True
+    assert str_to_bool_or_int("2") == 2
+    assert str_to_bool_or_int("abc") == "abc"
+
+
 def test_is_picklable(tmpdir):
     # See the full list of picklable types at
     # https://docs.python.org/3/library/pickle.html#pickle-picklable