diff --git a/pandas/_libs/hashtable.pxd b/pandas/_libs/hashtable.pxd
index 0499eabf708af..eebf89d9650e5 100644
--- a/pandas/_libs/hashtable.pxd
+++ b/pandas/_libs/hashtable.pxd
@@ -1,8 +1,16 @@
-from pandas._libs.khash cimport (
-    kh_int64_t, kh_uint64_t, kh_float64_t, kh_pymap_t, kh_str_t, uint64_t,
-    int64_t, float64_t)
 from numpy cimport ndarray
 
+from pandas._libs.khash cimport (
+    float64_t,
+    int64_t,
+    kh_float64_t,
+    kh_int64_t,
+    kh_pymap_t,
+    kh_str_t,
+    kh_uint64_t,
+    uint64_t,
+)
+
 # prototypes for sharing
 
 cdef class HashTable:
diff --git a/pandas/_libs/khash.pxd b/pandas/_libs/khash.pxd
index b5fe73df5d9be..1bb3a158b4b1a 100644
--- a/pandas/_libs/khash.pxd
+++ b/pandas/_libs/khash.pxd
@@ -1,5 +1,6 @@
 from cpython.object cimport PyObject
-from numpy cimport int64_t, uint64_t, int32_t, uint32_t, float64_t
+from numpy cimport float64_t, int32_t, int64_t, uint32_t, uint64_t
+
 
 cdef extern from "khash_python.h":
     ctypedef uint32_t khint_t
diff --git a/pandas/_libs/missing.pxd b/pandas/_libs/missing.pxd
index 090c5c5173280..e02b84381b62c 100644
--- a/pandas/_libs/missing.pxd
+++ b/pandas/_libs/missing.pxd
@@ -1,5 +1,6 @@
 from numpy cimport ndarray, uint8_t
 
+
 cpdef bint checknull(object val)
 cpdef bint checknull_old(object val)
 cpdef ndarray[uint8_t] isnaobj(ndarray arr)
diff --git a/pandas/_libs/tslibs/ccalendar.pxd b/pandas/_libs/tslibs/ccalendar.pxd
index 4eb5188b8a04b..388fd0c62b937 100644
--- a/pandas/_libs/tslibs/ccalendar.pxd
+++ b/pandas/_libs/tslibs/ccalendar.pxd
@@ -1,6 +1,5 @@
 from cython cimport Py_ssize_t
-
-from numpy cimport int64_t, int32_t
+from numpy cimport int32_t, int64_t
 
 ctypedef (int32_t, int32_t, int32_t) iso_calendar_t
 
diff --git a/pandas/_libs/tslibs/conversion.pxd b/pandas/_libs/tslibs/conversion.pxd
index 73772e5ab4577..31a6862be5fbf 100644
--- a/pandas/_libs/tslibs/conversion.pxd
+++ b/pandas/_libs/tslibs/conversion.pxd
@@ -1,6 +1,5 @@
 from cpython.datetime cimport datetime, tzinfo
-
-from numpy cimport int64_t, int32_t, ndarray
+from numpy cimport int32_t, int64_t, ndarray
 
 from pandas._libs.tslibs.np_datetime cimport npy_datetimestruct
 
diff --git a/pandas/_libs/tslibs/nattype.pxd b/pandas/_libs/tslibs/nattype.pxd
index 3f7240654d7e8..d38f4518f9bf0 100644
--- a/pandas/_libs/tslibs/nattype.pxd
+++ b/pandas/_libs/tslibs/nattype.pxd
@@ -1,6 +1,7 @@
 from cpython.datetime cimport datetime
-
 from numpy cimport int64_t
+
+
 cdef int64_t NPY_NAT
 
 cdef bint _nat_scalar_rules[6]
diff --git a/pandas/_libs/tslibs/np_datetime.pxd b/pandas/_libs/tslibs/np_datetime.pxd
index eebdcb3ace507..b2524c6bc6c0d 100644
--- a/pandas/_libs/tslibs/np_datetime.pxd
+++ b/pandas/_libs/tslibs/np_datetime.pxd
@@ -1,6 +1,6 @@
 from cpython.datetime cimport date, datetime
+from numpy cimport int32_t, int64_t
 
-from numpy cimport int64_t, int32_t
 
 cdef extern from "numpy/ndarrayobject.h":
     ctypedef int64_t npy_timedelta
diff --git a/pandas/_libs/tslibs/offsets.pxd b/pandas/_libs/tslibs/offsets.pxd
index 9a9244db4a565..215c3f849281f 100644
--- a/pandas/_libs/tslibs/offsets.pxd
+++ b/pandas/_libs/tslibs/offsets.pxd
@@ -1,5 +1,6 @@
 from numpy cimport int64_t
 
+
 cpdef to_offset(object obj)
 cdef bint is_offset_object(object obj)
 cdef bint is_tick_object(object obj)
diff --git a/pandas/_libs/tslibs/period.pxd b/pandas/_libs/tslibs/period.pxd
index 9c0342e239a89..46c6e52cb9156 100644
--- a/pandas/_libs/tslibs/period.pxd
+++ b/pandas/_libs/tslibs/period.pxd
@@ -2,5 +2,6 @@ from numpy cimport int64_t
 
 from .np_datetime cimport npy_datetimestruct
 
+
 cdef bint is_period_object(object obj)
 cdef int64_t get_period_ordinal(npy_datetimestruct *dts, int freq) nogil
diff --git a/pandas/_libs/tslibs/timedeltas.pxd b/pandas/_libs/tslibs/timedeltas.pxd
index 4142861e9ad38..fed1f2d326819 100644
--- a/pandas/_libs/tslibs/timedeltas.pxd
+++ b/pandas/_libs/tslibs/timedeltas.pxd
@@ -1,6 +1,7 @@
 from cpython.datetime cimport timedelta
 from numpy cimport int64_t
 
+
 # Exposed for tslib, not intended for outside use.
 cpdef int64_t delta_to_nanoseconds(delta) except? -1
 cdef convert_to_timedelta64(object ts, str unit)
diff --git a/pandas/_libs/tslibs/timestamps.pxd b/pandas/_libs/tslibs/timestamps.pxd
index 307b6dfc90715..755cf3fc940b8 100644
--- a/pandas/_libs/tslibs/timestamps.pxd
+++ b/pandas/_libs/tslibs/timestamps.pxd
@@ -1,5 +1,4 @@
 from cpython.datetime cimport datetime, tzinfo
-
 from numpy cimport int64_t
 
 from pandas._libs.tslibs.base cimport ABCTimestamp
diff --git a/pandas/_libs/tslibs/timezones.pxd b/pandas/_libs/tslibs/timezones.pxd
index 136710003d32a..753c881ed505c 100644
--- a/pandas/_libs/tslibs/timezones.pxd
+++ b/pandas/_libs/tslibs/timezones.pxd
@@ -1,5 +1,6 @@
 from cpython.datetime cimport datetime, timedelta, tzinfo
 
+
 cdef tzinfo utc_pytz
 
 cpdef bint is_utc(tzinfo tz)
diff --git a/pandas/_libs/tslibs/util.pxd b/pandas/_libs/tslibs/util.pxd
index e280609bb17a7..b5e89e5ed3ef4 100644
--- a/pandas/_libs/tslibs/util.pxd
+++ b/pandas/_libs/tslibs/util.pxd
@@ -1,6 +1,7 @@
 
 from cpython.object cimport PyTypeObject
 
+
 cdef extern from *:
     """
     PyObject* char_to_string(const char* data) {
@@ -26,7 +27,8 @@ cdef extern from "Python.h":
     const char* PyUnicode_AsUTF8AndSize(object obj,
                                         Py_ssize_t* length) except NULL
 
-from numpy cimport int64_t, float64_t
+from numpy cimport float64_t, int64_t
+
 
 cdef extern from "numpy/arrayobject.h":
     PyTypeObject PyFloatingArrType_Type
diff --git a/pandas/_libs/util.pxd b/pandas/_libs/util.pxd
index 828bccf7d5641..7394605722103 100644
--- a/pandas/_libs/util.pxd
+++ b/pandas/_libs/util.pxd
@@ -1,8 +1,9 @@
-from pandas._libs.tslibs.util cimport *
-
 cimport numpy as cnp
 from numpy cimport ndarray
 
+from pandas._libs.tslibs.util cimport *
+
+
 cdef extern from "numpy/ndarraytypes.h":
     void PyArray_CLEARFLAGS(ndarray arr, int flags) nogil
 
diff --git a/pandas/tests/tseries/offsets/test_offsets.py b/pandas/tests/tseries/offsets/test_offsets.py
index 67cbbac47bc68..e235d503cfd14 100644
--- a/pandas/tests/tseries/offsets/test_offsets.py
+++ b/pandas/tests/tseries/offsets/test_offsets.py
@@ -4441,14 +4441,7 @@ def test_week_add_invalid():
 
 
 @pytest.mark.parametrize(
-    "attribute",
-    [
-        "hours",
-        "days",
-        "weeks",
-        "months",
-        "years",
-    ],
+    "attribute", ["hours", "days", "weeks", "months", "years"],
 )
 def test_dateoffset_immutable(attribute):
     offset = DateOffset(**{attribute: 0})