diff --git a/docs/conf.py b/docs/conf.py
index d507d314..b4ca976e 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -26,9 +26,8 @@
 
 import os
 
-from jsonschema2rst.parser_runner import run_parser
-
 from inspire_schemas import __version__
+from jsonschema2rst.parser_runner import run_parser
 
 
 def _generate_schemas_doc():
diff --git a/inspire_schemas/__init__.py b/inspire_schemas/__init__.py
index 0709f8b4..702692cc 100644
--- a/inspire_schemas/__init__.py
+++ b/inspire_schemas/__init__.py
@@ -24,4 +24,4 @@
 
 """Schemas and utilities used in inspirehep."""
 
-__version__ = "61.6.6"
+__version__ = "61.6.2"
diff --git a/setup.py b/setup.py
index 71ea0e8b..c8fec6e7 100644
--- a/setup.py
+++ b/setup.py
@@ -170,6 +170,7 @@ def _generate_json_schemas():
     'check-manifest',
     'coverage',
     'isort~=4.0,>=4.3.0',
+    'pytest',
     'pytest-cache',
     'pytest-cov==2.6.1',
     'pytest~=6.0,>=6.2.5',
diff --git a/tests/integration/test_builders.py b/tests/integration/test_builders.py
index d55a0b5b..2506f806 100644
--- a/tests/integration/test_builders.py
+++ b/tests/integration/test_builders.py
@@ -59,6 +59,7 @@ def expected_data_hep():
 def input_data_hep():
     return load_file('input_data_hep.yaml')
 
+
 @pytest.fixture(scope='module')
 def conference_data():
     return load_json_file('conferences_example.json')
diff --git a/tests/unit/test_data_builder.py b/tests/unit/test_data_builder.py
index fb39cb7f..af2c9215 100644
--- a/tests/unit/test_data_builder.py
+++ b/tests/unit/test_data_builder.py
@@ -72,6 +72,7 @@ def test_add_title():
     ]
     assert result == expected
 
+
 def test_add_creation_date():
     builder = DataBuilder()
     creation_date = "2020-01-01"
@@ -79,6 +80,7 @@ def test_add_creation_date():
     result = builder.record.get("creation_date")
     assert result == creation_date
 
+
 def test_add_doi():
     builder = DataBuilder()
     doi = "10.1234/example.doi"
diff --git a/tests/unit/test_parsers_arxiv.py b/tests/unit/test_parsers_arxiv.py
index 91c425d1..206b2095 100644
--- a/tests/unit/test_parsers_arxiv.py
+++ b/tests/unit/test_parsers_arxiv.py
@@ -65,8 +65,10 @@ def test_latex_to_unicode_preserves_comments():
     expected = (u"A 4% measurement of $H_0$ using the cumulative"
                 u"distribution of strong-lensing time delays in doubly-imaged quasars")
     result = ArxivParser.latex_to_unicode(
-        (u"A 4% measurement of $H_0$ using the cumulative"
-                u"distribution of strong-lensing time delays in doubly-imaged quasars")
+        (
+            u"A 4% measurement of $H_0$ using the cumulative"
+            u"distribution of strong-lensing time delays in doubly-imaged quasars"
+        )
     )
 
     assert result == expected
diff --git a/tests/unit/test_signature_builder.py b/tests/unit/test_signature_builder.py
index b911f4a2..75c89067 100644
--- a/tests/unit/test_signature_builder.py
+++ b/tests/unit/test_signature_builder.py
@@ -252,7 +252,7 @@ def test_add_raw_affiliation(subschema):
     assert_field_valid(expected, builder.obj, 'raw_affiliations', subschema)
 
 
-@pytest.mark.skipif(sys.version_info < (3,3), reason="`inspect.signature` requires python 3")
+@pytest.mark.skipif(sys.version_info < (3, 3), reason="`inspect.signature` requires python 3")
 @pytest.mark.parametrize('field_name', dir(SignatureBuilder))
 def test_public_method_ignores_none_params(field_name):
     builder = SignatureBuilder()