tests: Format all Python code with black, except tests in basics subdir.

This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.

44 files changed, 618 insertions, 448 deletions

diff --git a/tests/float/array_construct.py b/tests/float/array_construct.py
index eb735c67c..f6a3a9dc9 100644
--- a/tests/float/array_construct.py
+++ b/tests/float/array_construct.py
@@ -9,5 +9,5 @@ except ImportError:
         print("SKIP")
         raise SystemExit
 
-print(array('f', array('h', [1, 2])))
-print(array('d', array('f', [1, 2])))
+print(array("f", array("h", [1, 2])))
+print(array("d", array("f", [1, 2])))
diff --git a/tests/float/builtin_float_abs.py b/tests/float/builtin_float_abs.py
index c0935c6ee..f7ce9e156 100644
--- a/tests/float/builtin_float_abs.py
+++ b/tests/float/builtin_float_abs.py
@@ -1,13 +1,13 @@
 # test builtin abs function with float args
 
 for val in (
-    '1.0',
-    '-1.0',
-    '0.0',
-    '-0.0',
-    'nan',
-    '-nan',
-    'inf',
-    '-inf',
-    ):
+    "1.0",
+    "-1.0",
+    "0.0",
+    "-0.0",
+    "nan",
+    "-nan",
+    "inf",
+    "-inf",
+):
     print(val, abs(float(val)))
diff --git a/tests/float/builtin_float_hash.py b/tests/float/builtin_float_hash.py
index 7a7e37401..1388bb0e8 100644
--- a/tests/float/builtin_float_hash.py
+++ b/tests/float/builtin_float_hash.py
@@ -2,24 +2,24 @@
 
 # these should hash to an integer with a specific value
 for val in (
-    '0.0',
-    '-0.0',
-    '1.0',
-    '2.0',
-    '-12.0',
-    '12345.0',
-    ):
+    "0.0",
+    "-0.0",
+    "1.0",
+    "2.0",
+    "-12.0",
+    "12345.0",
+):
     print(val, hash(float(val)))
 
 # just check that these values are hashable
 for val in (
-    '0.1',
-    '-0.1',
-    '10.3',
-    '0.4e3',
-    '1e16',
-    'inf',
-    '-inf',
-    'nan',
-    ):
+    "0.1",
+    "-0.1",
+    "10.3",
+    "0.4e3",
+    "1e16",
+    "inf",
+    "-inf",
+    "nan",
+):
     print(val, type(hash(float(val))))
diff --git a/tests/float/builtin_float_minmax.py b/tests/float/builtin_float_minmax.py
index 266ed133d..8a53746e5 100644
--- a/tests/float/builtin_float_minmax.py
+++ b/tests/float/builtin_float_minmax.py
@@ -29,4 +29,3 @@ print(min([1, 2.9, 4, 6.5, -1, 2]))
 print(max([1, 2.9, 4, 6.5, -1, 2]))
 print(min([1, 2.9, 4, -6.5, -1, 2]))
 print(max([1, 2.9, 4, -6.5, -1, 2]))
-
diff --git a/tests/float/builtin_float_pow.py b/tests/float/builtin_float_pow.py
index 2de1b4817..98998bdc7 100644
--- a/tests/float/builtin_float_pow.py
+++ b/tests/float/builtin_float_pow.py
@@ -6,6 +6,6 @@ print(pow(1.0, 1))
 print(pow(2.0, 3.0))
 print(pow(2.0, -4.0))
 
-print(pow(0.0, float('inf')))
-print(pow(0.0, float('-inf')))
-print(pow(0.0, float('nan')))
+print(pow(0.0, float("inf")))
+print(pow(0.0, float("-inf")))
+print(pow(0.0, float("nan")))
diff --git a/tests/float/builtin_float_round.py b/tests/float/builtin_float_round.py
index 63cb39aa3..1153b8a2b 100644
--- a/tests/float/builtin_float_round.py
+++ b/tests/float/builtin_float_round.py
@@ -2,8 +2,18 @@
 
 # check basic cases
 tests = [
-    [0.0], [1.0], [0.1], [-0.1], [123.4], [123.6], [-123.4], [-123.6],
-    [1.234567, 5], [1.23456, 1], [1.23456, 0], [1234.56, -2]
+    [0.0],
+    [1.0],
+    [0.1],
+    [-0.1],
+    [123.4],
+    [123.6],
+    [-123.4],
+    [-123.6],
+    [1.234567, 5],
+    [1.23456, 1],
+    [1.23456, 0],
+    [1234.56, -2],
 ]
 for t in tests:
     print(round(*t))
@@ -17,7 +27,7 @@ for i in range(-1, 3):
     print(round(1.47, i))
 
 # test inf and nan
-for val in (float('inf'), float('nan')):
+for val in (float("inf"), float("nan")):
     try:
         round(val)
     except (ValueError, OverflowError) as e:
diff --git a/tests/float/builtin_float_round_intbig.py b/tests/float/builtin_float_round_intbig.py
index 2083e3ea3..c8a338eef 100644
--- a/tests/float/builtin_float_round_intbig.py
+++ b/tests/float/builtin_float_round_intbig.py
@@ -1,4 +1,4 @@
 # test round() with floats that return large integers
 
 for x in (-1e25, 1e25):
-    print('%.3g' % round(x))
+    print("%.3g" % round(x))
diff --git a/tests/float/bytearray_construct.py b/tests/float/bytearray_construct.py
index 4e7631b2b..257d37d1b 100644
--- a/tests/float/bytearray_construct.py
+++ b/tests/float/bytearray_construct.py
@@ -9,4 +9,4 @@ except ImportError:
         print("SKIP")
         raise SystemExit
 
-print(bytearray(array('f', [1, 2.3])))
+print(bytearray(array("f", [1, 2.3])))
diff --git a/tests/float/bytes_construct.py b/tests/float/bytes_construct.py
index 96294659b..0806087b0 100644
--- a/tests/float/bytes_construct.py
+++ b/tests/float/bytes_construct.py
@@ -9,4 +9,4 @@ except ImportError:
         print("SKIP")
         raise SystemExit
 
-print(bytes(array('f', [1, 2.3])))
+print(bytes(array("f", [1, 2.3])))
diff --git a/tests/float/cmath_fun.py b/tests/float/cmath_fun.py
index d3df25e11..7b5e69245 100644
--- a/tests/float/cmath_fun.py
+++ b/tests/float/cmath_fun.py
@@ -11,29 +11,33 @@ print("%.5g" % e)
 print("%.5g" % pi)
 
 test_values_non_zero = []
-base_values = (0.0, 0.5, 1.2345, 10.)
+base_values = (0.0, 0.5, 1.2345, 10.0)
 for r in base_values:
     for i in base_values:
-        if r != 0. or i != 0.:
+        if r != 0.0 or i != 0.0:
             test_values_non_zero.append(complex(r, i))
-        if r != 0.:
+        if r != 0.0:
             test_values_non_zero.append(complex(-r, i))
-        if i != 0.:
+        if i != 0.0:
             test_values_non_zero.append(complex(r, -i))
-        if r != 0. and i != 0.:
+        if r != 0.0 and i != 0.0:
             test_values_non_zero.append(complex(-r, -i))
-test_values = [complex(0., 0.),] + test_values_non_zero
+test_values = [complex(0.0, 0.0),] + test_values_non_zero
 print(test_values)
 
 functions = [
-    ('phase', phase, test_values),
-    ('polar', polar, test_values),
-    ('rect', rect, ((0, 0), (0, 1), (0, -1), (1, 0), (-1, 0), (1, 1), (-1, 1), (1, -1), (123., -456.))),
-    ('exp', exp, test_values),
-    ('log', log, test_values_non_zero),
-    ('sqrt', sqrt, test_values),
-    ('cos', cos, test_values),
-    ('sin', sin, test_values),
+    ("phase", phase, test_values),
+    ("polar", polar, test_values),
+    (
+        "rect",
+        rect,
+        ((0, 0), (0, 1), (0, -1), (1, 0), (-1, 0), (1, 1), (-1, 1), (1, -1), (123.0, -456.0)),
+    ),
+    ("exp", exp, test_values),
+    ("log", log, test_values_non_zero),
+    ("sqrt", sqrt, test_values),
+    ("cos", cos, test_values),
+    ("sin", sin, test_values),
 ]
 
 for f_name, f, test_vals in functions:
@@ -51,5 +55,5 @@ for f_name, f, test_vals in functions:
             # some test (eg cmath.sqrt(-0.5)) disagree with CPython with tiny real part
             real = ret.real
             if abs(real) < 1e-6:
-                real = 0.
+                real = 0.0
             print("complex(%.5g, %.5g)" % (real, ret.imag))
diff --git a/tests/float/cmath_fun_special.py b/tests/float/cmath_fun_special.py
index 471fda8c0..33b94d04d 100644
--- a/tests/float/cmath_fun_special.py
+++ b/tests/float/cmath_fun_special.py
@@ -2,26 +2,27 @@
 
 try:
     from cmath import *
+
     log10
 except (ImportError, NameError):
     print("SKIP")
     raise SystemExit
 
 test_values_non_zero = []
-base_values = (0.0, 0.5, 1.2345, 10.)
+base_values = (0.0, 0.5, 1.2345, 10.0)
 for r in base_values:
     for i in base_values:
-        if r != 0. or i != 0.:
+        if r != 0.0 or i != 0.0:
             test_values_non_zero.append(complex(r, i))
-        if r != 0.:
+        if r != 0.0:
             test_values_non_zero.append(complex(-r, i))
-        if i != 0.:
+        if i != 0.0:
             test_values_non_zero.append(complex(r, -i))
-        if r != 0. and i != 0.:
+        if r != 0.0 and i != 0.0:
             test_values_non_zero.append(complex(-r, -i))
 
 functions = [
-    ('log10', log10, test_values_non_zero),
+    ("log10", log10, test_values_non_zero),
 ]
 
 for f_name, f, test_vals in functions:
diff --git a/tests/float/complex1.py b/tests/float/complex1.py
index c1fa61ba3..a510ffc83 100644
--- a/tests/float/complex1.py
+++ b/tests/float/complex1.py
@@ -27,11 +27,16 @@ print(1j * 2j)
 print(1j / 2)
 print((1j / 2j).real)
 print(1j / (1 + 2j))
-ans = 0j ** 0; print("%.5g %.5g" % (ans.real, ans.imag))
-ans = 0j ** 1; print("%.5g %.5g" % (ans.real, ans.imag))
-ans = 0j ** 0j; print("%.5g %.5g" % (ans.real, ans.imag))
-ans = 1j ** 2.5; print("%.5g %.5g" % (ans.real, ans.imag))
-ans = 1j ** 2.5j; print("%.5g %.5g" % (ans.real, ans.imag))
+ans = 0j ** 0
+print("%.5g %.5g" % (ans.real, ans.imag))
+ans = 0j ** 1
+print("%.5g %.5g" % (ans.real, ans.imag))
+ans = 0j ** 0j
+print("%.5g %.5g" % (ans.real, ans.imag))
+ans = 1j ** 2.5
+print("%.5g %.5g" % (ans.real, ans.imag))
+ans = 1j ** 2.5j
+print("%.5g %.5g" % (ans.real, ans.imag))
 
 # comparison
 print(1j == 1)
@@ -40,7 +45,7 @@ print(0 + 0j == False, 1 + 0j == True)
 print(False == 0 + 0j, True == 1 + 0j)
 
 # comparison of nan is special
-nan = float('nan') * 1j
+nan = float("nan") * 1j
 print(nan == 1j)
 print(nan == nan)
 
@@ -56,20 +61,22 @@ print(type(hash(1j)))
 print(1.2 + 3j)
 
 # negative base and fractional power should create a complex
-ans = (-1) ** 2.3; print("%.5g %.5g" % (ans.real, ans.imag))
-ans = (-1.2) ** -3.4; print("%.5g %.5g" % (ans.real, ans.imag))
+ans = (-1) ** 2.3
+print("%.5g %.5g" % (ans.real, ans.imag))
+ans = (-1.2) ** -3.4
+print("%.5g %.5g" % (ans.real, ans.imag))
 
 # check printing of inf/nan
-print(float('nan') * 1j)
-print(float('-nan') * 1j)
-print(float('inf') * (1 + 1j))
-print(float('-inf') * (1 + 1j))
+print(float("nan") * 1j)
+print(float("-nan") * 1j)
+print(float("inf") * (1 + 1j))
+print(float("-inf") * (1 + 1j))
 
 # can't assign to attributes
 try:
     (1j).imag = 0
 except AttributeError:
-    print('AttributeError')
+    print("AttributeError")
 
 # can't convert rhs to complex
 try:
@@ -95,11 +102,11 @@ try:
 except TypeError:
     print("TypeError")
 
-#small int on LHS, complex on RHS, unsupported op
+# small int on LHS, complex on RHS, unsupported op
 try:
     print(1 | 1j)
 except TypeError:
-    print('TypeError')
+    print("TypeError")
 
 # zero division
 try:
diff --git a/tests/float/complex1_intbig.py b/tests/float/complex1_intbig.py
index ed2390bba..864036b99 100644
--- a/tests/float/complex1_intbig.py
+++ b/tests/float/complex1_intbig.py
@@ -1,4 +1,5 @@
 # test basic complex number functionality
 
 # convert bignum to complex on rhs
-ans = 1j + (1 << 70); print("%.5g %.5g" % (ans.real, ans.imag))
+ans = 1j + (1 << 70)
+print("%.5g %.5g" % (ans.real, ans.imag))
diff --git a/tests/float/float1.py b/tests/float/float1.py
index f6d69e390..efde5146b 100644
--- a/tests/float/float1.py
+++ b/tests/float/float1.py
@@ -1,11 +1,11 @@
 # test basic float capabilities
 
 # literals
-print(.12)
-print(1.)
+print(0.12)
+print(1.0)
 print(1.2)
 print(0e0)
-print(0e+0)
+print(0e0)
 print(0e-0)
 
 # float construction
@@ -68,7 +68,7 @@ print(0.0 == False, 1.0 == True)
 print(False == 0.0, True == 1.0)
 
 # comparison of nan is special
-nan = float('nan')
+nan = float("nan")
 print(nan == 1.2)
 print(nan == nan)
 
@@ -108,7 +108,7 @@ except TypeError:
 try:
     print(1 | 1.0)
 except TypeError:
-    print('TypeError')
+    print("TypeError")
 
 # can't convert list to float
 try:
diff --git a/tests/float/float2int_doubleprec_intbig.py b/tests/float/float2int_doubleprec_intbig.py
index de2137d66..24d30fe69 100644
--- a/tests/float/float2int_doubleprec_intbig.py
+++ b/tests/float/float2int_doubleprec_intbig.py
@@ -6,6 +6,7 @@ except:
     import struct
 
 import sys
+
 maxsize_bits = 0
 maxsize = sys.maxsize
 while maxsize:
@@ -31,32 +32,33 @@ if ll_type is None:
 
 # This case occurs with time.time() values
 if ll_type != 0:
-    print(int(1418774543.))
-    print("%d" % 1418774543.)
+    print(int(1418774543.0))
+    print("%d" % 1418774543.0)
     if ll_type == 3:
-        print(int(2.**100))
-        print("%d" % 2.**100)
+        print(int(2.0 ** 100))
+        print("%d" % 2.0 ** 100)
 else:
-    print(int(1073741823.))
-    print("%d" % 1073741823.)
+    print(int(1073741823.0))
+    print("%d" % 1073741823.0)
 
 testpass = True
-p2_rng = ((30,63,1024),(62,63,1024))[is_64bit][ll_type]
-for i in range(0,p2_rng):
-    bitcnt = len(bin(int(2.**i))) - 3;
+p2_rng = ((30, 63, 1024), (62, 63, 1024))[is_64bit][ll_type]
+for i in range(0, p2_rng):
+    bitcnt = len(bin(int(2.0 ** i))) - 3
     if i != bitcnt:
-        print('fail: 2**%u was %u bits long' % (i, bitcnt));
+        print("fail: 2**%u was %u bits long" % (i, bitcnt))
         testpass = False
-print("power of  2 test: %s" % (testpass and 'passed' or 'failed'))
+print("power of  2 test: %s" % (testpass and "passed" or "failed"))
 
 testpass = True
-p10_rng = ((9,18,23),(18,18,23))[is_64bit][ll_type]
-for i in range(0,p10_rng):
-    digcnt = len(str(int(10.**i))) - 1;
+p10_rng = ((9, 18, 23), (18, 18, 23))[is_64bit][ll_type]
+for i in range(0, p10_rng):
+    digcnt = len(str(int(10.0 ** i))) - 1
     if i != digcnt:
-        print('fail: 10**%u was %u digits long' % (i, digcnt));
+        print("fail: 10**%u was %u digits long" % (i, digcnt))
         testpass = False
-print("power of 10 test: %s" % (testpass and 'passed' or 'failed'))
+print("power of 10 test: %s" % (testpass and "passed" or "failed"))
+
 
 def fp2int_test(num, name, should_fail):
     try:
@@ -64,37 +66,38 @@ def fp2int_test(num, name, should_fail):
         passed = ~should_fail
     except:
         passed = should_fail
-    print('%s: %s' % (name, passed and 'passed' or 'failed'))
+    print("%s: %s" % (name, passed and "passed" or "failed"))
+
 
 if ll_type != 2:
     if ll_type == 0:
         if is_64bit:
-            neg_bad_fp = -1.00000005*2.**62.
-            pos_bad_fp = 2.**62.
-            neg_good_fp = -2.**62.
-            pos_good_fp = 0.99999993*2.**62.
+            neg_bad_fp = -1.00000005 * 2.0 ** 62.0
+            pos_bad_fp = 2.0 ** 62.0
+            neg_good_fp = -(2.0 ** 62.0)
+            pos_good_fp = 0.99999993 * 2.0 ** 62.0
         else:
-            neg_bad_fp = -1.00000005*2.**30.
-            pos_bad_fp = 2.**30.
-            neg_good_fp = -2.**30.
-            pos_good_fp = 0.9999999499*2.**30.
+            neg_bad_fp = -1.00000005 * 2.0 ** 30.0
+            pos_bad_fp = 2.0 ** 30.0
+            neg_good_fp = -(2.0 ** 30.0)
+            pos_good_fp = 0.9999999499 * 2.0 ** 30.0
     else:
-        neg_bad_fp = -0.51*2.**64.
-        pos_bad_fp = 2.**63.
-        neg_good_fp = -2.**63.
-        pos_good_fp = 1.9999998*2.**62.
+        neg_bad_fp = -0.51 * 2.0 ** 64.0
+        pos_bad_fp = 2.0 ** 63.0
+        neg_good_fp = -(2.0 ** 63.0)
+        pos_good_fp = 1.9999998 * 2.0 ** 62.0
 
-    fp2int_test(neg_bad_fp, 'neg bad', True)
-    fp2int_test(pos_bad_fp, 'pos bad', True)
-    fp2int_test(neg_good_fp, 'neg good', False)
-    fp2int_test(pos_good_fp, 'pos good', False)
+    fp2int_test(neg_bad_fp, "neg bad", True)
+    fp2int_test(pos_bad_fp, "pos bad", True)
+    fp2int_test(neg_good_fp, "neg good", False)
+    fp2int_test(pos_good_fp, "pos good", False)
 else:
-    fp2int_test(-1.9999999999999981*2.**1023., 'large neg', False)
-    fp2int_test(1.9999999999999981*2.**1023., 'large pos', False)
+    fp2int_test(-1.9999999999999981 * 2.0 ** 1023.0, "large neg", False)
+    fp2int_test(1.9999999999999981 * 2.0 ** 1023.0, "large pos", False)
 
-fp2int_test(float('inf'), 'inf test', True)
-fp2int_test(float('nan'), 'NaN test', True)
+fp2int_test(float("inf"), "inf test", True)
+fp2int_test(float("nan"), "NaN test", True)
 
 # test numbers < 1 (this used to fail; see issue #1044)
-fp2int_test(0.0001, 'small num', False)
-struct.pack('I', int(1/2))
+fp2int_test(0.0001, "small num", False)
+struct.pack("I", int(1 / 2))
diff --git a/tests/float/float2int_fp30_intbig.py b/tests/float/float2int_fp30_intbig.py
index fbb94a4cc..da3980040 100644
--- a/tests/float/float2int_fp30_intbig.py
+++ b/tests/float/float2int_fp30_intbig.py
@@ -6,6 +6,7 @@ except:
     import struct
 
 import sys
+
 maxsize_bits = 0
 maxsize = sys.maxsize
 while maxsize:
@@ -30,30 +31,31 @@ if ll_type is None:
         ll_type = 2
 
 # basic conversion
-print(int(14187744.))
-print("%d" % 14187744.)
+print(int(14187744.0))
+print("%d" % 14187744.0)
 if ll_type == 2:
-    print(int(2.**100))
-    print("%d" % 2.**100)
+    print(int(2.0 ** 100))
+    print("%d" % 2.0 ** 100)
 
 testpass = True
-p2_rng = ((30,63,127),(62,63,127))[is_64bit][ll_type]
-for i in range(0,p2_rng):
-    bitcnt = len(bin(int(2.**i))) - 3;
+p2_rng = ((30, 63, 127), (62, 63, 127))[is_64bit][ll_type]
+for i in range(0, p2_rng):
+    bitcnt = len(bin(int(2.0 ** i))) - 3
     if i != bitcnt:
-        print('fail: 2.**%u was %u bits long' % (i, bitcnt));
+        print("fail: 2.**%u was %u bits long" % (i, bitcnt))
         testpass = False
-print("power of  2 test: %s" % (testpass and 'passed' or 'failed'))
+print("power of  2 test: %s" % (testpass and "passed" or "failed"))
 
 # TODO why does 10**12 fail this test for single precision float?
 testpass = True
 p10_rng = 9
-for i in range(0,p10_rng):
-    digcnt = len(str(int(10.**i))) - 1;
+for i in range(0, p10_rng):
+    digcnt = len(str(int(10.0 ** i))) - 1
     if i != digcnt:
-        print('fail: 10.**%u was %u digits long' % (i, digcnt));
+        print("fail: 10.**%u was %u digits long" % (i, digcnt))
         testpass = False
-print("power of 10 test: %s" % (testpass and 'passed' or 'failed'))
+print("power of 10 test: %s" % (testpass and "passed" or "failed"))
+
 
 def fp2int_test(num, name, should_fail):
     try:
@@ -61,37 +63,38 @@ def fp2int_test(num, name, should_fail):
         passed = ~should_fail
     except:
         passed = should_fail
-    print('%s: %s' % (name, passed and 'passed' or 'failed'))
+    print("%s: %s" % (name, passed and "passed" or "failed"))
+
 
 if ll_type != 2:
     if ll_type == 0:
         if is_64bit:
-            neg_bad_fp = -1.00000005*2.**62.
-            pos_bad_fp = 2.**62.
-            neg_good_fp = -2.**62.
-            pos_good_fp = 0.99999993*2.**62.
+            neg_bad_fp = -1.00000005 * 2.0 ** 62.0
+            pos_bad_fp = 2.0 ** 62.0
+            neg_good_fp = -(2.0 ** 62.0)
+            pos_good_fp = 0.99999993 * 2.0 ** 62.0
         else:
-            neg_bad_fp = -1.00000005*2.**30.
-            pos_bad_fp = 2.**30.
-            neg_good_fp = -2.**30.
-            pos_good_fp = 0.9999999499*2.**30.
+            neg_bad_fp = -1.00000005 * 2.0 ** 30.0
+            pos_bad_fp = 2.0 ** 30.0
+            neg_good_fp = -(2.0 ** 30.0)
+            pos_good_fp = 0.9999999499 * 2.0 ** 30.0
     else:
-        neg_bad_fp = -0.51*2.**64.
-        pos_bad_fp = 2.**63.
-        neg_good_fp = -2.**63.
-        pos_good_fp = 1.9999998*2.**62.
+        neg_bad_fp = -0.51 * 2.0 ** 64.0
+        pos_bad_fp = 2.0 ** 63.0
+        neg_good_fp = -(2.0 ** 63.0)
+        pos_good_fp = 1.9999998 * 2.0 ** 62.0
 
-    fp2int_test(neg_bad_fp, 'neg bad', True)
-    fp2int_test(pos_bad_fp, 'pos bad', True)
-    fp2int_test(neg_good_fp, 'neg good', False)
-    fp2int_test(pos_good_fp, 'pos good', False)
+    fp2int_test(neg_bad_fp, "neg bad", True)
+    fp2int_test(pos_bad_fp, "pos bad", True)
+    fp2int_test(neg_good_fp, "neg good", False)
+    fp2int_test(pos_good_fp, "pos good", False)
 else:
-    fp2int_test(-1.999999879*2.**126., 'large neg', False)
-    fp2int_test(1.999999879*2.**126., 'large pos', False)
+    fp2int_test(-1.999999879 * 2.0 ** 126.0, "large neg", False)
+    fp2int_test(1.999999879 * 2.0 ** 126.0, "large pos", False)
 
-fp2int_test(float('inf'), 'inf test', True)
-fp2int_test(float('nan'), 'NaN test', True)
+fp2int_test(float("inf"), "inf test", True)
+fp2int_test(float("nan"), "NaN test", True)
 
 # test numbers < 1 (this used to fail; see issue #1044)
-fp2int_test(0.0001, 'small num', False)
-struct.pack('I', int(1/2))
+fp2int_test(0.0001, "small num", False)
+struct.pack("I", int(1 / 2))
diff --git a/tests/float/float2int_intbig.py b/tests/float/float2int_intbig.py
index 3596d2f73..62aca3963 100644
--- a/tests/float/float2int_intbig.py
+++ b/tests/float/float2int_intbig.py
@@ -32,30 +32,33 @@ if ll_type is None:
 
 
 # basic conversion
+# fmt: off
 print(int(14187745.))
 print("%d" % 14187745.)
+# fmt: on
 if ll_type == 2:
-    print(int(2.**100))
-    print("%d" % 2.**100)
+    print(int(2.0 ** 100))
+    print("%d" % 2.0 ** 100)
 
 testpass = True
-p2_rng = ((30,63,127),(62,63,127))[is_64bit][ll_type]
-for i in range(0,p2_rng):
-    bitcnt = len(bin(int(2.**i))) - 3;
+p2_rng = ((30, 63, 127), (62, 63, 127))[is_64bit][ll_type]
+for i in range(0, p2_rng):
+    bitcnt = len(bin(int(2.0 ** i))) - 3
     if i != bitcnt:
-        print('fail: 2.**%u was %u bits long' % (i, bitcnt));
+        print("fail: 2.**%u was %u bits long" % (i, bitcnt))
         testpass = False
-print("power of  2 test: %s" % (testpass and 'passed' or 'failed'))
+print("power of  2 test: %s" % (testpass and "passed" or "failed"))
 
 # TODO why does 10**12 fail this test for single precision float?
 testpass = True
 p10_rng = 9 if (ll_type == 0 and ~is_64bit) else 11
-for i in range(0,p10_rng):
-    digcnt = len(str(int(10.**i))) - 1;
+for i in range(0, p10_rng):
+    digcnt = len(str(int(10.0 ** i))) - 1
     if i != digcnt:
-        print('fail: 10.**%u was %u digits long' % (i, digcnt));
+        print("fail: 10.**%u was %u digits long" % (i, digcnt))
         testpass = False
-print("power of 10 test: %s" % (testpass and 'passed' or 'failed'))
+print("power of 10 test: %s" % (testpass and "passed" or "failed"))
+
 
 def fp2int_test(num, name, should_fail):
     try:
@@ -63,37 +66,38 @@ def fp2int_test(num, name, should_fail):
         passed = ~should_fail
     except:
         passed = should_fail
-    print('%s: %s' % (name, passed and 'passed' or 'failed'))
+    print("%s: %s" % (name, passed and "passed" or "failed"))
+
 
 if ll_type != 2:
     if ll_type == 0:
         if is_64bit:
-            neg_bad_fp = -1.00000005*2.**62.
-            pos_bad_fp = 2.**62.
-            neg_good_fp = -2.**62.
-            pos_good_fp = 0.99999993*2.**62.
+            neg_bad_fp = -1.00000005 * 2.0 ** 62.0
+            pos_bad_fp = 2.0 ** 62.0
+            neg_good_fp = -(2.0 ** 62.0)
+            pos_good_fp = 0.99999993 * 2.0 ** 62.0
         else:
-            neg_bad_fp = -1.00000005*2.**30.
-            pos_bad_fp = 2.**30.
-            neg_good_fp = -2.**30.
-            pos_good_fp = 0.9999999499*2.**30.
+            neg_bad_fp = -1.00000005 * 2.0 ** 30.0
+            pos_bad_fp = 2.0 ** 30.0
+            neg_good_fp = -(2.0 ** 30.0)
+            pos_good_fp = 0.9999999499 * 2.0 ** 30.0
     else:
-        neg_bad_fp = -0.51*2.**64.
-        pos_bad_fp = 2.**63.
-        neg_good_fp = -2.**63.
-        pos_good_fp = 1.9999998*2.**62.
+        neg_bad_fp = -0.51 * 2.0 ** 64.0
+        pos_bad_fp = 2.0 ** 63.0
+        neg_good_fp = -(2.0 ** 63.0)
+        pos_good_fp = 1.9999998 * 2.0 ** 62.0
 
-    fp2int_test(neg_bad_fp, 'neg bad', True)
-    fp2int_test(pos_bad_fp, 'pos bad', True)
-    fp2int_test(neg_good_fp, 'neg good', False)
-    fp2int_test(pos_good_fp, 'pos good', False)
+    fp2int_test(neg_bad_fp, "neg bad", True)
+    fp2int_test(pos_bad_fp, "pos bad", True)
+    fp2int_test(neg_good_fp, "neg good", False)
+    fp2int_test(pos_good_fp, "pos good", False)
 else:
-    fp2int_test(-1.999999879*2.**127., 'large neg', False)
-    fp2int_test(1.999999879*2.**127., 'large pos', False)
+    fp2int_test(-1.999999879 * 2.0 ** 127.0, "large neg", False)
+    fp2int_test(1.999999879 * 2.0 ** 127.0, "large pos", False)
 
-fp2int_test(float('inf'), 'inf test', True)
-fp2int_test(float('nan'), 'NaN test', True)
+fp2int_test(float("inf"), "inf test", True)
+fp2int_test(float("nan"), "NaN test", True)
 
 # test numbers < 1 (this used to fail; see issue #1044)
-fp2int_test(0.0001, 'small num', False)
-struct.pack('I', int(1/2))
+fp2int_test(0.0001, "small num", False)
+struct.pack("I", int(1 / 2))
diff --git a/tests/float/float_array.py b/tests/float/float_array.py
index 0c7f1b3ad..3c2189869 100644
--- a/tests/float/float_array.py
+++ b/tests/float/float_array.py
@@ -7,17 +7,19 @@ except ImportError:
         print("SKIP")
         raise SystemExit
 
+
 def test(a):
     print(a)
     a.append(1.2)
-    print(len(a), '%.3f' % a[0])
+    print(len(a), "%.3f" % a[0])
     a.append(1)
     a.append(False)
-    print(len(a), '%.3f %.3f' % (a[1], a[2]))
+    print(len(a), "%.3f %.3f" % (a[1], a[2]))
     a[-1] = 3.45
-    print('%.3f' % a[-1])
+    print("%.3f" % a[-1])
+
 
-test(array('f'))
-test(array('d'))
+test(array("f"))
+test(array("d"))
 
-print('{:.4f}'.format(array('f', b'\xcc\xcc\xcc=')[0]))
+print("{:.4f}".format(array("f", b"\xcc\xcc\xcc=")[0]))
diff --git a/tests/float/float_compare.py b/tests/float/float_compare.py
index 105923ac7..c177aa7e8 100644
--- a/tests/float/float_compare.py
+++ b/tests/float/float_compare.py
@@ -1,8 +1,10 @@
 # Extended float comparisons
 
+
 class Foo:
     pass
 
+
 foo = Foo()
 
 print(foo == 1.0)
diff --git a/tests/float/float_divmod.py b/tests/float/float_divmod.py
index 8e7cd435a..ec83ce2d1 100644
--- a/tests/float/float_divmod.py
+++ b/tests/float/float_divmod.py
@@ -1,11 +1,13 @@
 # test floating point floor divide and modulus
 # it has some tricky corner cases
 
+
 def test(x, y):
     div, mod = divmod(x, y)
-    print('%.8f %.8f %.8f %.8f' % (x // y, x % y, div, mod))
+    print("%.8f %.8f %.8f %.8f" % (x // y, x % y, div, mod))
     print(div == x // y, mod == x % y, abs(div * y + mod - x) < 1e-15)
 
+
 test(1.23456, 0.7)
 test(-1.23456, 0.7)
 test(1.23456, -0.7)
diff --git a/tests/float/float_divmod_relaxed.py b/tests/float/float_divmod_relaxed.py
index a9450fa2c..ef5a6ad2e 100644
--- a/tests/float/float_divmod_relaxed.py
+++ b/tests/float/float_divmod_relaxed.py
@@ -4,10 +4,12 @@
 # pyboard has 32-bit floating point and gives different (but still
 # correct) answers for certain combinations of divmod arguments.
 
+
 def test(x, y):
     div, mod = divmod(x, y)
     print(div == x // y, mod == x % y, abs(div * y + mod - x) < 1e-6)
 
+
 test(1.23456, 0.7)
 test(-1.23456, 0.7)
 test(1.23456, -0.7)
@@ -30,4 +32,4 @@ for i in range(25):
 try:
     divmod(1.0, 0)
 except ZeroDivisionError:
-    print('ZeroDivisionError')
+    print("ZeroDivisionError")
diff --git a/tests/float/float_format.py b/tests/float/float_format.py
index d43535cf2..4c8a21756 100644
--- a/tests/float/float_format.py
+++ b/tests/float/float_format.py
@@ -2,18 +2,18 @@
 
 # general rounding
 for val in (116, 1111, 1234, 5010, 11111):
-    print('%.0f' % val)
-    print('%.1f' % val)
-    print('%.3f' % val)
+    print("%.0f" % val)
+    print("%.1f" % val)
+    print("%.3f" % val)
 
 # make sure rounding is done at the correct precision
 for prec in range(8):
-    print(('%%.%df' % prec) % 6e-5)
+    print(("%%.%df" % prec) % 6e-5)
 
 # check certain cases that had a digit value of 10 render as a ":" character
-print('%.2e' % float('9' * 51 + 'e-39'))
-print('%.2e' % float('9' * 40 + 'e-21'))
+print("%.2e" % float("9" * 51 + "e-39"))
+print("%.2e" % float("9" * 40 + "e-21"))
 
 # check a case that would render negative digit values, eg ")" characters
 # the string is converted back to a float to check for no illegal characters
-float('%.23e' % 1e-80)
+float("%.23e" % 1e-80)
diff --git a/tests/float/float_parse.py b/tests/float/float_parse.py
index 4b5fc613d..de27c33e7 100644
--- a/tests/float/float_parse.py
+++ b/tests/float/float_parse.py
@@ -1,36 +1,36 @@
 # test parsing of floats
 
-inf = float('inf')
+inf = float("inf")
 
 # it shouldn't matter where the decimal point is if the exponent balances the value
-print(float('1234') - float('0.1234e4'))
-print(float('1.015625') - float('1015625e-6'))
+print(float("1234") - float("0.1234e4"))
+print(float("1.015625") - float("1015625e-6"))
 
 # very large integer part with a very negative exponent should cancel out
-print('%.4e' % float('9' * 60 + 'e-60'))
-print('%.4e' % float('9' * 60 + 'e-40'))
+print("%.4e" % float("9" * 60 + "e-60"))
+print("%.4e" % float("9" * 60 + "e-40"))
 
 # many fractional digits
-print(float('.' + '9' * 70))
-print(float('.' + '9' * 70 + 'e20'))
-print(float('.' + '9' * 70 + 'e-50') == float('1e-50'))
+print(float("." + "9" * 70))
+print(float("." + "9" * 70 + "e20"))
+print(float("." + "9" * 70 + "e-50") == float("1e-50"))
 
 # tiny fraction with large exponent
-print(float('.' + '0' * 60 + '1e10') == float('1e-51'))
-print(float('.' + '0' * 60 + '9e25') == float('9e-36'))
-print(float('.' + '0' * 60 + '9e40') == float('9e-21'))
+print(float("." + "0" * 60 + "1e10") == float("1e-51"))
+print(float("." + "0" * 60 + "9e25") == float("9e-36"))
+print(float("." + "0" * 60 + "9e40") == float("9e-21"))
 
 # ensure that accuracy is retained when value is close to a subnormal
-print(float('1.00000000000000000000e-37'))
-print(float('10.0000000000000000000e-38'))
-print(float('100.000000000000000000e-39'))
+print(float("1.00000000000000000000e-37"))
+print(float("10.0000000000000000000e-38"))
+print(float("100.000000000000000000e-39"))
 
 # very large exponent literal
-print(float('1e4294967301'))
-print(float('1e-4294967301'))
-print(float('1e18446744073709551621'))
-print(float('1e-18446744073709551621'))
+print(float("1e4294967301"))
+print(float("1e-4294967301"))
+print(float("1e18446744073709551621"))
+print(float("1e-18446744073709551621"))
 
 # check small decimals are as close to their true value as possible
 for n in range(1, 10):
-    print(float('0.%u' % n) == n / 10)
+    print(float("0.%u" % n) == n / 10)
diff --git a/tests/float/float_parse_doubleprec.py b/tests/float/float_parse_doubleprec.py
index dcc0dd592..81fcadcee 100644
--- a/tests/float/float_parse_doubleprec.py
+++ b/tests/float/float_parse_doubleprec.py
@@ -1,21 +1,21 @@
 # test parsing of floats, requiring double-precision
 
 # very large integer part with a very negative exponent should cancel out
-print(float('9' * 400 + 'e-100'))
-print(float('9' * 400 + 'e-200'))
-print(float('9' * 400 + 'e-400'))
+print(float("9" * 400 + "e-100"))
+print(float("9" * 400 + "e-200"))
+print(float("9" * 400 + "e-400"))
 
 # many fractional digits
-print(float('.' + '9' * 400))
-print(float('.' + '9' * 400 + 'e100'))
-print(float('.' + '9' * 400 + 'e-100'))
+print(float("." + "9" * 400))
+print(float("." + "9" * 400 + "e100"))
+print(float("." + "9" * 400 + "e-100"))
 
 # tiny fraction with large exponent
-print('%.14e' % float('.' + '0' * 400 + '9e100'))
-print('%.14e' % float('.' + '0' * 400 + '9e200'))
-print('%.14e' % float('.' + '0' * 400 + '9e400'))
+print("%.14e" % float("." + "0" * 400 + "9e100"))
+print("%.14e" % float("." + "0" * 400 + "9e200"))
+print("%.14e" % float("." + "0" * 400 + "9e400"))
 
 # ensure that accuracy is retained when value is close to a subnormal
-print(float('1.00000000000000000000e-307'))
-print(float('10.0000000000000000000e-308'))
-print(float('100.000000000000000000e-309'))
+print(float("1.00000000000000000000e-307"))
+print(float("10.0000000000000000000e-308"))
+print(float("100.000000000000000000e-309"))
diff --git a/tests/float/float_struct.py b/tests/float/float_struct.py
index c4c186b89..18893af0e 100644
--- a/tests/float/float_struct.py
+++ b/tests/float/float_struct.py
@@ -8,11 +8,10 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-i = 1. + 1/2
+i = 1.0 + 1 / 2
 # TODO: it looks like '=' format modifier is not yet supported
 # for fmt in ('f', 'd', '>f', '>d', '<f', '<d', '=f', '=d'):
-for fmt in ('f', 'd', '>f', '>d', '<f', '<d'):
+for fmt in ("f", "d", ">f", ">d", "<f", "<d"):
     x = struct.pack(fmt, i)
     v = struct.unpack(fmt, x)[0]
-    print('%2s: %.17f - %s' % (fmt, v, (i == v) and 'passed' or 'failed'))
-
+    print("%2s: %.17f - %s" % (fmt, v, (i == v) and "passed" or "failed"))
diff --git a/tests/float/int_power.py b/tests/float/int_power.py
index 649d4d415..ba79247a5 100644
--- a/tests/float/int_power.py
+++ b/tests/float/int_power.py
@@ -5,4 +5,4 @@ print(x ** -2)
 
 x = 3
 x **= -2
-print('%.5f' % x)
+print("%.5f" % x)
diff --git a/tests/float/math_domain.py b/tests/float/math_domain.py
index 0cf10fb2a..2d4670f75 100644
--- a/tests/float/math_domain.py
+++ b/tests/float/math_domain.py
@@ -6,46 +6,46 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-inf = float('inf')
-nan = float('nan')
+inf = float("inf")
+nan = float("nan")
 
 # single argument functions
 for name, f, args in (
-    ('fabs', math.fabs, ()),
-    ('ceil', math.ceil, ()),
-    ('floor', math.floor, ()),
-    ('trunc', math.trunc, ()),
-    ('sqrt', math.sqrt, (-1, 0)),
-    ('exp', math.exp, ()),
-    ('sin', math.sin, ()),
-    ('cos', math.cos, ()),
-    ('tan', math.tan, ()),
-    ('asin', math.asin, (-1.1, 1, 1.1)),
-    ('acos', math.acos, (-1.1, 1, 1.1)),
-    ('atan', math.atan, ()),
-    ('ldexp', lambda x: math.ldexp(x, 0), ()),
-    ('radians', math.radians, ()),
-    ('degrees', math.degrees, ()),
-    ):
+    ("fabs", math.fabs, ()),
+    ("ceil", math.ceil, ()),
+    ("floor", math.floor, ()),
+    ("trunc", math.trunc, ()),
+    ("sqrt", math.sqrt, (-1, 0)),
+    ("exp", math.exp, ()),
+    ("sin", math.sin, ()),
+    ("cos", math.cos, ()),
+    ("tan", math.tan, ()),
+    ("asin", math.asin, (-1.1, 1, 1.1)),
+    ("acos", math.acos, (-1.1, 1, 1.1)),
+    ("atan", math.atan, ()),
+    ("ldexp", lambda x: math.ldexp(x, 0), ()),
+    ("radians", math.radians, ()),
+    ("degrees", math.degrees, ()),
+):
     for x in args + (inf, nan):
         try:
             ans = f(x)
-            print('%.4f' % ans)
+            print("%.4f" % ans)
         except ValueError:
-            print(name, 'ValueError')
+            print(name, "ValueError")
         except OverflowError:
-            print(name, 'OverflowError')
+            print(name, "OverflowError")
 
 # double argument functions
 for name, f, args in (
-    ('pow', math.pow, ((0, 2), (-1, 2), (0, -1), (-1, 2.3))),
-    ('fmod', math.fmod, ((1.2, inf), (1.2, 0), (inf, 1.2))),
-    ('atan2', math.atan2, ((0, 0),)),
-    ('copysign', math.copysign, ()),
-    ):
+    ("pow", math.pow, ((0, 2), (-1, 2), (0, -1), (-1, 2.3))),
+    ("fmod", math.fmod, ((1.2, inf), (1.2, 0), (inf, 1.2))),
+    ("atan2", math.atan2, ((0, 0),)),
+    ("copysign", math.copysign, ()),
+):
     for x in args + ((0, inf), (inf, 0), (inf, inf), (inf, nan), (nan, inf), (nan, nan)):
         try:
             ans = f(*x)
-            print('%.4f' % ans)
+            print("%.4f" % ans)
         except ValueError:
-            print(name, 'ValueError')
+            print(name, "ValueError")
diff --git a/tests/float/math_domain_special.py b/tests/float/math_domain_special.py
index 5650c35fe..880594dce 100644
--- a/tests/float/math_domain_special.py
+++ b/tests/float/math_domain_special.py
@@ -2,35 +2,36 @@
 
 try:
     import math
+
     math.erf
 except (ImportError, AttributeError):
     print("SKIP")
     raise SystemExit
 
-inf = float('inf')
-nan = float('nan')
+inf = float("inf")
+nan = float("nan")
 
 # single argument functions
 for name, f, args in (
-    ('expm1', math.exp, ()),
-    ('log2', math.log2, (-1, 0)),
-    ('log10', math.log10, (-1, 0)),
-    ('sinh', math.sinh, ()),
-    ('cosh', math.cosh, ()),
-    ('tanh', math.tanh, ()),
-    ('asinh', math.asinh, ()),
-    ('acosh', math.acosh, (-1, 0.9, 1)),
-    ('atanh', math.atanh, (-1, 1)),
-    ('erf', math.erf, ()),
-    ('erfc', math.erfc, ()),
-    ('gamma', math.gamma, (-2, -1, 0, 1)),
-    ('lgamma', math.lgamma, (-2, -1, 0, 1)),
-    ):
+    ("expm1", math.exp, ()),
+    ("log2", math.log2, (-1, 0)),
+    ("log10", math.log10, (-1, 0)),
+    ("sinh", math.sinh, ()),
+    ("cosh", math.cosh, ()),
+    ("tanh", math.tanh, ()),
+    ("asinh", math.asinh, ()),
+    ("acosh", math.acosh, (-1, 0.9, 1)),
+    ("atanh", math.atanh, (-1, 1)),
+    ("erf", math.erf, ()),
+    ("erfc", math.erfc, ()),
+    ("gamma", math.gamma, (-2, -1, 0, 1)),
+    ("lgamma", math.lgamma, (-2, -1, 0, 1)),
+):
     for x in args + (inf, -inf, nan):
         try:
             ans = f(x)
-            print('%.4f' % ans)
+            print("%.4f" % ans)
         except ValueError:
-            print(name, 'ValueError')
+            print(name, "ValueError")
         except OverflowError:
-            print(name, 'OverflowError')
+            print(name, "OverflowError")
diff --git a/tests/float/math_factorial_intbig.py b/tests/float/math_factorial_intbig.py
index 19d853df2..a4694b3d6 100644
--- a/tests/float/math_factorial_intbig.py
+++ b/tests/float/math_factorial_intbig.py
@@ -1,14 +1,15 @@
 try:
     import math
+
     math.factorial
 except (ImportError, AttributeError):
-    print('SKIP')
+    print("SKIP")
     raise SystemExit
 
 
 for fun in (math.factorial,):
     for x in range(-1, 30):
         try:
-            print('%d' % fun(x))
+            print("%d" % fun(x))
         except ValueError as e:
-            print('ValueError')
+            print("ValueError")
diff --git a/tests/float/math_fun.py b/tests/float/math_fun.py
index 2835b9bfb..7b6bb8648 100644
--- a/tests/float/math_fun.py
+++ b/tests/float/math_fun.py
@@ -6,26 +6,36 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-test_values = [-100., -1.23456, -1, -0.5, 0.0, 0.5, 1.23456, 100.]
-test_values_small = [-10., -1.23456, -1, -0.5, 0.0, 0.5, 1.23456, 10.] # so we don't overflow 32-bit precision
-unit_range_test_values = [-1., -0.75, -0.5, -0.25, 0., 0.25, 0.5, 0.75, 1.]
-
-functions = [('sqrt', sqrt, test_values),
-             ('exp', exp, test_values_small),
-             ('log', log, test_values),
-             ('cos', cos, test_values),
-             ('sin', sin, test_values),
-             ('tan', tan, test_values),
-             ('acos', acos, unit_range_test_values),
-             ('asin', asin, unit_range_test_values),
-             ('atan', atan, test_values),
-             ('ceil', ceil, test_values),
-             ('fabs', fabs, test_values),
-             ('floor', floor, test_values),
-             ('trunc', trunc, test_values),
-             ('radians', radians, test_values),
-             ('degrees', degrees, test_values),
-            ]
+test_values = [-100.0, -1.23456, -1, -0.5, 0.0, 0.5, 1.23456, 100.0]
+test_values_small = [
+    -10.0,
+    -1.23456,
+    -1,
+    -0.5,
+    0.0,
+    0.5,
+    1.23456,
+    10.0,
+]  # so we don't overflow 32-bit precision
+unit_range_test_values = [-1.0, -0.75, -0.5, -0.25, 0.0, 0.25, 0.5, 0.75, 1.0]
+
+functions = [
+    ("sqrt", sqrt, test_values),
+    ("exp", exp, test_values_small),
+    ("log", log, test_values),
+    ("cos", cos, test_values),
+    ("sin", sin, test_values),
+    ("tan", tan, test_values),
+    ("acos", acos, unit_range_test_values),
+    ("asin", asin, unit_range_test_values),
+    ("atan", atan, test_values),
+    ("ceil", ceil, test_values),
+    ("fabs", fabs, test_values),
+    ("floor", floor, test_values),
+    ("trunc", trunc, test_values),
+    ("radians", radians, test_values),
+    ("degrees", degrees, test_values),
+]
 
 for function_name, function, test_vals in functions:
     print(function_name)
@@ -35,9 +45,10 @@ for function_name, function, test_vals in functions:
         except ValueError as e:
             print(str(e))
 
-tuple_functions = [('frexp', frexp, test_values),
-                   ('modf', modf, test_values),
-                  ]
+tuple_functions = [
+    ("frexp", frexp, test_values),
+    ("modf", modf, test_values),
+]
 
 for function_name, function, test_vals in tuple_functions:
     print(function_name)
@@ -45,14 +56,31 @@ for function_name, function, test_vals in tuple_functions:
         x, y = function(value)
         print("{:.5g} {:.5g}".format(x, y))
 
-binary_functions = [('copysign', copysign, [(23., 42.), (-23., 42.), (23., -42.),
-                                (-23., -42.), (1., 0.0), (1., -0.0)]),
-                    ('pow', pow, ((1., 0.), (0., 1.), (2., 0.5), (-3., 5.), (-3., -4.),)),
-                    ('atan2', atan2, ((1., 0.), (0., 1.), (2., 0.5), (-3., 5.), (-3., -4.),)),
-                    ('fmod', fmod, ((1., 1.), (0., 1.), (2., 0.5), (-3., 5.), (-3., -4.),)),
-                    ('ldexp', ldexp, ((1., 0), (0., 1), (2., 2), (3., -2), (-3., -4),)),
-                    ('log', log, ((2., 2.), (3., 2.), (4., 5.), (0., 1.), (1., 0.), (-1., 1.), (1., -1.), (2., 1.))),
-                   ]
+binary_functions = [
+    (
+        "copysign",
+        copysign,
+        [(23.0, 42.0), (-23.0, 42.0), (23.0, -42.0), (-23.0, -42.0), (1.0, 0.0), (1.0, -0.0)],
+    ),
+    ("pow", pow, ((1.0, 0.0), (0.0, 1.0), (2.0, 0.5), (-3.0, 5.0), (-3.0, -4.0),)),
+    ("atan2", atan2, ((1.0, 0.0), (0.0, 1.0), (2.0, 0.5), (-3.0, 5.0), (-3.0, -4.0),)),
+    ("fmod", fmod, ((1.0, 1.0), (0.0, 1.0), (2.0, 0.5), (-3.0, 5.0), (-3.0, -4.0),)),
+    ("ldexp", ldexp, ((1.0, 0), (0.0, 1), (2.0, 2), (3.0, -2), (-3.0, -4),)),
+    (
+        "log",
+        log,
+        (
+            (2.0, 2.0),
+            (3.0, 2.0),
+            (4.0, 5.0),
+            (0.0, 1.0),
+            (1.0, 0.0),
+            (-1.0, 1.0),
+            (1.0, -1.0),
+            (2.0, 1.0),
+        ),
+    ),
+]
 
 for function_name, function, test_vals in binary_functions:
     print(function_name)
diff --git a/tests/float/math_fun_bool.py b/tests/float/math_fun_bool.py
index 30ab14a52..6e9af0dd3 100644
--- a/tests/float/math_fun_bool.py
+++ b/tests/float/math_fun_bool.py
@@ -6,8 +6,7 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-test_values = [1, 0, -1, 1.0, 0.0, -1.0, float('NaN'), float('Inf'), 
-               -float('NaN'), -float('Inf')]
+test_values = [1, 0, -1, 1.0, 0.0, -1.0, float("NaN"), float("Inf"), -float("NaN"), -float("Inf")]
 
 functions = [isfinite, isnan, isinf]
 
diff --git a/tests/float/math_fun_int.py b/tests/float/math_fun_int.py
index 5cadbb1e5..2cabad4e0 100644
--- a/tests/float/math_fun_int.py
+++ b/tests/float/math_fun_int.py
@@ -7,7 +7,7 @@ except ImportError:
     raise SystemExit
 
 for fun in (math.ceil, math.floor, math.trunc):
-    for x in (-1.6, -0.2, 0, 0.6, 1.4, float('inf'), float('nan')):
+    for x in (-1.6, -0.2, 0, 0.6, 1.4, float("inf"), float("nan")):
         try:
             print(fun(x))
         except (ValueError, OverflowError) as e:
diff --git a/tests/float/math_fun_intbig.py b/tests/float/math_fun_intbig.py
index 697ca7a6d..7169b8017 100644
--- a/tests/float/math_fun_intbig.py
+++ b/tests/float/math_fun_intbig.py
@@ -8,4 +8,4 @@ except ImportError:
 
 for fun in (math.ceil, math.floor, math.trunc):
     for x in (-1e25, 1e25):
-        print('%.3g' % fun(x))
+        print("%.3g" % fun(x))
diff --git a/tests/float/math_fun_special.py b/tests/float/math_fun_special.py
index e676a6fc9..c101a7e50 100644
--- a/tests/float/math_fun_special.py
+++ b/tests/float/math_fun_special.py
@@ -2,28 +2,45 @@
 
 try:
     from math import *
+
     erf
 except (ImportError, NameError):
     print("SKIP")
     raise SystemExit
 
-test_values = [-8., -2.5, -1, -0.5, 0.0, 0.5, 2.5, 8.,]
-pos_test_values = [0.001, 0.1, 0.5, 1.0, 1.5, 10.,]
+test_values = [
+    -8.0,
+    -2.5,
+    -1,
+    -0.5,
+    0.0,
+    0.5,
+    2.5,
+    8.0,
+]
+pos_test_values = [
+    0.001,
+    0.1,
+    0.5,
+    1.0,
+    1.5,
+    10.0,
+]
 
 functions = [
-    ('expm1', expm1, test_values),
-    ('log2', log2, test_values),
-    ('log10', log10, test_values),
-    ('cosh', cosh, test_values),
-    ('sinh', sinh, test_values),
-    ('tanh', tanh, [-1e6, -100] + test_values + [100, 1e6]),
-    ('acosh', acosh, [1.0, 5.0, 1.0]),
-    ('asinh', asinh, test_values),
-    ('atanh', atanh, [-0.99, -0.5, 0.0, 0.5, 0.99]),
-    ('erf', erf, test_values),
-    ('erfc', erfc, test_values),
-    ('gamma', gamma, pos_test_values),
-    ('lgamma', lgamma, pos_test_values + [50., 100.,]),
+    ("expm1", expm1, test_values),
+    ("log2", log2, test_values),
+    ("log10", log10, test_values),
+    ("cosh", cosh, test_values),
+    ("sinh", sinh, test_values),
+    ("tanh", tanh, [-1e6, -100] + test_values + [100, 1e6]),
+    ("acosh", acosh, [1.0, 5.0, 1.0]),
+    ("asinh", asinh, test_values),
+    ("atanh", atanh, [-0.99, -0.5, 0.0, 0.5, 0.99]),
+    ("erf", erf, test_values),
+    ("erfc", erfc, test_values),
+    ("gamma", gamma, pos_test_values),
+    ("lgamma", lgamma, pos_test_values + [50.0, 100.0,]),
 ]
 
 for function_name, function, test_vals in functions:
diff --git a/tests/float/math_isclose.py b/tests/float/math_isclose.py
index 13dfff75f..ef3e20f4f 100644
--- a/tests/float/math_isclose.py
+++ b/tests/float/math_isclose.py
@@ -6,19 +6,22 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
+
 def test(a, b, **kwargs):
     print(isclose(a, b, **kwargs))
 
+
 def test_combinations(a, b, **kwargs):
     test(a, a, **kwargs)
     test(a, b, **kwargs)
     test(b, a, **kwargs)
     test(b, b, **kwargs)
 
+
 # Special numbers
-test_combinations(float('nan'), 1)
-test_combinations(float('inf'), 1)
-test_combinations(float('-inf'), 1)
+test_combinations(float("nan"), 1)
+test_combinations(float("inf"), 1)
+test_combinations(float("-inf"), 1)
 
 # Equality
 test(1.0, 1.0, rel_tol=0.0, abs_tol=0.0)
@@ -40,8 +43,8 @@ test(0.0, 1e-10, abs_tol=0.0, rel_tol=0.1)
 try:
     isclose(0, 0, abs_tol=-1)
 except ValueError:
-    print('ValueError')
+    print("ValueError")
 try:
     isclose(0, 0, rel_tol=-1)
 except ValueError:
-    print('ValueError')
+    print("ValueError")
diff --git a/tests/float/python36.py b/tests/float/python36.py
index 6e8fb1f21..9e64e7a06 100644
--- a/tests/float/python36.py
+++ b/tests/float/python36.py
@@ -2,9 +2,9 @@
 
 # underscores in numeric literals
 print(1_000.1_8)
-print('%.2g' % 1e1_2)
+print("%.2g" % 1e1_2)
 
 # underscore supported by int/float constructors
-print(float('1_2_3'))
-print(float('1_2_3.4'))
-print('%.2g' % float('1e1_3'))
+print(float("1_2_3"))
+print(float("1_2_3.4"))
+print("%.2g" % float("1e1_3"))
diff --git a/tests/float/string_format.py b/tests/float/string_format.py
index 54f127077..13382b903 100644
--- a/tests/float/string_format.py
+++ b/tests/float/string_format.py
@@ -1,5 +1,6 @@
 def test(fmt, *args):
-    print('{:8s}'.format(fmt) + '>' +  fmt.format(*args) + '<')
+    print("{:8s}".format(fmt) + ">" + fmt.format(*args) + "<")
+
 
 test("{:10.4}", 123.456)
 test("{:10.4e}", 123.456)
@@ -24,21 +25,21 @@ test("{:06e}", float("inf"))
 test("{:06e}", float("-inf"))
 test("{:06e}", float("nan"))
 
-test('{:f}', False)
-test('{:f}', True)
+test("{:f}", False)
+test("{:f}", True)
 
 # The following fails right now
-#test("{:10.1}", 0.0)
+# test("{:10.1}", 0.0)
 
 print("%.0f" % (1.750000 % 0.08333333333))
 # Below isn't compatible with single-precision float
-#print("%.1f" % (1.750000 % 0.08333333333))
-#print("%.2f" % (1.750000 % 0.08333333333))
-#print("%.12f" % (1.750000 % 0.08333333333))
+# print("%.1f" % (1.750000 % 0.08333333333))
+# print("%.2f" % (1.750000 % 0.08333333333))
+# print("%.12f" % (1.750000 % 0.08333333333))
 
 # tests for errors in format string
 
 try:
-    '{:10.1b}'.format(0.0)
+    "{:10.1b}".format(0.0)
 except ValueError:
-    print('ValueError')
+    print("ValueError")
diff --git a/tests/float/string_format2.py b/tests/float/string_format2.py
index 269023e7f..7a36f4d2f 100644
--- a/tests/float/string_format2.py
+++ b/tests/float/string_format2.py
@@ -3,15 +3,17 @@
 
 full_tests = False
 
+
 def test(fmt, *args):
-    print('{:8s}'.format(fmt) + '>' +  fmt.format(*args) + '<')
+    print("{:8s}".format(fmt) + ">" + fmt.format(*args) + "<")
+
 
 def test_fmt(conv, fill, alignment, sign, prefix, width, precision, type, arg):
-    fmt = '{'
+    fmt = "{"
     if conv:
-        fmt += '!'
+        fmt += "!"
         fmt += conv
-    fmt += ':'
+    fmt += ":"
     if alignment:
         fmt += fill
         fmt += alignment
@@ -19,88 +21,162 @@ def test_fmt(conv, fill, alignment, sign, prefix, width, precision, type, arg):
     fmt += prefix
     fmt += width
     if precision:
-        fmt += '.'
+        fmt += "."
         fmt += precision
     fmt += type
-    fmt += '}'
-    test(fmt,  arg)
-    if fill == '0' and alignment == '=':
-        fmt = '{:'
+    fmt += "}"
+    test(fmt, arg)
+    if fill == "0" and alignment == "=":
+        fmt = "{:"
         fmt += sign
         fmt += prefix
         fmt += width
         if precision:
-            fmt += '.'
+            fmt += "."
             fmt += precision
         fmt += type
-        fmt += '}'
+        fmt += "}"
         test(fmt, arg)
 
-eg_nums = (0.0, -0.0, 0.1, 1.234, 12.3459, 1.23456789, 123456789.0, -0.0,
-    -0.1, -1.234, -12.3459, 1e4, 1e-4, 1e5, 1e-5, 1e6, 1e-6, 1e10,
-    1e37, -1e37, 1e-37, -1e-37,
-    1.23456e8, 1.23456e7, 1.23456e6, 1.23456e5, 1.23456e4, 1.23456e3, 1.23456e2, 1.23456e1, 1.23456e0,
-    1.23456e-1, 1.23456e-2, 1.23456e-3, 1.23456e-4, 1.23456e-5, 1.23456e-6, 1.23456e-7, 1.23456e-8,
-    -1.23456e8, -1.23456e7, -1.23456e6, -1.23456e5, -1.23456e4, -1.23456e3, -1.23456e2, -1.23456e1, -1.23456e0,
-    -1.23456e-1, -1.23456e-2, -1.23456e-3, -1.23456e-4, -1.23456e-5, -1.23456e-6, -1.23456e-7, -1.23456e-8)
+
+eg_nums = (
+    0.0,
+    -0.0,
+    0.1,
+    1.234,
+    12.3459,
+    1.23456789,
+    123456789.0,
+    -0.0,
+    -0.1,
+    -1.234,
+    -12.3459,
+    1e4,
+    1e-4,
+    1e5,
+    1e-5,
+    1e6,
+    1e-6,
+    1e10,
+    1e37,
+    -1e37,
+    1e-37,
+    -1e-37,
+    1.23456e8,
+    1.23456e7,
+    1.23456e6,
+    1.23456e5,
+    1.23456e4,
+    1.23456e3,
+    1.23456e2,
+    1.23456e1,
+    1.23456e0,
+    1.23456e-1,
+    1.23456e-2,
+    1.23456e-3,
+    1.23456e-4,
+    1.23456e-5,
+    1.23456e-6,
+    1.23456e-7,
+    1.23456e-8,
+    -1.23456e8,
+    -1.23456e7,
+    -1.23456e6,
+    -1.23456e5,
+    -1.23456e4,
+    -1.23456e3,
+    -1.23456e2,
+    -1.23456e1,
+    -1.23456e0,
+    -1.23456e-1,
+    -1.23456e-2,
+    -1.23456e-3,
+    -1.23456e-4,
+    -1.23456e-5,
+    -1.23456e-6,
+    -1.23456e-7,
+    -1.23456e-8,
+)
 
 if full_tests:
-    for type in ('e', 'E', 'g', 'G', 'n'):
-        for width in ('', '4', '6', '8', '10'):
-            for alignment in ('', '<', '>', '=', '^'):
-                for fill in ('', '@', '0', ' '):
-                    for sign in ('', '+', '-', ' '):
-                        for prec in ('', '1', '3', '6'):
+    for type in ("e", "E", "g", "G", "n"):
+        for width in ("", "4", "6", "8", "10"):
+            for alignment in ("", "<", ">", "=", "^"):
+                for fill in ("", "@", "0", " "):
+                    for sign in ("", "+", "-", " "):
+                        for prec in ("", "1", "3", "6"):
                             for num in eg_nums:
-                                test_fmt('', fill, alignment, sign, '', width, prec, type, num)
+                                test_fmt("", fill, alignment, sign, "", width, prec, type, num)
 
 # Note: We use 1.23459 rather than 1.2345 because '{:3f}'.format(1.2345)
 #       rounds differently than print("%.3f", 1.2345);
 
-f_nums = (0.0, -0.0, 0.0001, 0.001, 0.01, 0.1, 1.0, 10.0,
-     0.0012,  0.0123,  0.1234,  1.23459,  12.3456,
-    -0.0001, -0.001,  -0.01,   -0.1,      -1.0, -10.0,
-    -0.0012, -0.0123, -0.1234, -1.23459, -12.3456)
+f_nums = (
+    0.0,
+    -0.0,
+    0.0001,
+    0.001,
+    0.01,
+    0.1,
+    1.0,
+    10.0,
+    0.0012,
+    0.0123,
+    0.1234,
+    1.23459,
+    12.3456,
+    -0.0001,
+    -0.001,
+    -0.01,
+    -0.1,
+    -1.0,
+    -10.0,
+    -0.0012,
+    -0.0123,
+    -0.1234,
+    -1.23459,
+    -12.3456,
+)
 
 if full_tests:
-    for type in ('f', 'F'):
-        for width in ('', '4', '6', '8', '10'):
-            for alignment in ('', '<', '>', '=', '^'):
-                for fill in ('', ' ', '0', '@'):
-                    for sign in ('', '+', '-', ' '):
+    for type in ("f", "F"):
+        for width in ("", "4", "6", "8", "10"):
+            for alignment in ("", "<", ">", "=", "^"):
+                for fill in ("", " ", "0", "@"):
+                    for sign in ("", "+", "-", " "):
                         # An empty precision defaults to 6, but when uPy is
                         # configured to use a float, we can only use a
                         # precision of 6 with numbers less than 10 and still
                         # get results that compare to CPython (which uses
                         # long doubles).
-                        for prec in ('1', '2', '3'):
+                        for prec in ("1", "2", "3"):
                             for num in f_nums:
-                                test_fmt('', fill, alignment, sign, '', width, prec, type, num)
+                                test_fmt("", fill, alignment, sign, "", width, prec, type, num)
                         for num in int_nums2:
-                            test_fmt('', fill, alignment, sign, '', width, '', type, num)
+                            test_fmt("", fill, alignment, sign, "", width, "", type, num)
 
 pct_nums1 = (0.1, 0.58, 0.99, -0.1, -0.58, -0.99)
 pct_nums2 = (True, False, 1, 0, -1)
 
 if full_tests:
-    type = '%'
-    for width in ('', '4', '6', '8', '10'):
-        for alignment in ('', '<', '>', '=', '^'):
-            for fill in ('', ' ', '0', '@'):
-                for sign in ('', '+', '-', ' '):
+    type = "%"
+    for width in ("", "4", "6", "8", "10"):
+        for alignment in ("", "<", ">", "=", "^"):
+            for fill in ("", " ", "0", "@"):
+                for sign in ("", "+", "-", " "):
                     # An empty precision defaults to 6, but when uPy is
                     # configured to use a float, we can only use a
                     # precision of 6 with numbers less than 10 and still
                     # get results that compare to CPython (which uses
                     # long doubles).
-                    for prec in ('1', '2', '3'):
+                    for prec in ("1", "2", "3"):
                         for num in pct_nums1:
-                            test_fmt('', fill, alignment, sign, '', width, prec, type, num)
+                            test_fmt("", fill, alignment, sign, "", width, prec, type, num)
                     for num in pct_nums2:
-                        test_fmt('', fill, alignment, sign, '', width, '', type, num)
+                        test_fmt("", fill, alignment, sign, "", width, "", type, num)
 else:
     for num in pct_nums1:
-        test_fmt('', '', '', '', '', '', '1', '%', num)
+        test_fmt("", "", "", "", "", "", "1", "%", num)
 
 # We don't currently test a type of '' with floats (see the detailed comment
 # in  objstr.c)
diff --git a/tests/float/string_format_fp30.py b/tests/float/string_format_fp30.py
index 77b2a5288..5f0b213da 100644
--- a/tests/float/string_format_fp30.py
+++ b/tests/float/string_format_fp30.py
@@ -1,11 +1,12 @@
 def test(fmt, *args):
-    print('{:8s}'.format(fmt) + '>' +  fmt.format(*args) + '<')
+    print("{:8s}".format(fmt) + ">" + fmt.format(*args) + "<")
+
 
 test("{:10.4}", 123.456)
 test("{:10.4e}", 123.456)
 test("{:10.4e}", -123.456)
-#test("{:10.4f}", 123.456)
-#test("{:10.4f}", -123.456)
+# test("{:10.4f}", 123.456)
+# test("{:10.4f}", -123.456)
 test("{:10.4g}", 123.456)
 test("{:10.4g}", -123.456)
 test("{:10.4n}", 123.456)
@@ -15,8 +16,8 @@ test("{:g}", 300)
 
 test("{:10.4E}", 123.456)
 test("{:10.4E}", -123.456)
-#test("{:10.4F}", 123.456)
-#test("{:10.4F}", -123.456)
+# test("{:10.4F}", 123.456)
+# test("{:10.4F}", -123.456)
 test("{:10.4G}", 123.456)
 test("{:10.4G}", -123.456)
 
@@ -25,17 +26,17 @@ test("{:06e}", float("-inf"))
 test("{:06e}", float("nan"))
 
 # The following fails right now
-#test("{:10.1}", 0.0)
+# test("{:10.1}", 0.0)
 
 print("%.0f" % (1.750000 % 0.08333333333))
 # Below isn't compatible with single-precision float
-#print("%.1f" % (1.750000 % 0.08333333333))
-#print("%.2f" % (1.750000 % 0.08333333333))
-#print("%.12f" % (1.750000 % 0.08333333333))
+# print("%.1f" % (1.750000 % 0.08333333333))
+# print("%.2f" % (1.750000 % 0.08333333333))
+# print("%.12f" % (1.750000 % 0.08333333333))
 
 # tests for errors in format string
 
 try:
-    '{:10.1b}'.format(0.0)
+    "{:10.1b}".format(0.0)
 except ValueError:
-    print('ValueError')
+    print("ValueError")
diff --git a/tests/float/string_format_modulo.py b/tests/float/string_format_modulo.py
index aea534247..094461538 100644
--- a/tests/float/string_format_modulo.py
+++ b/tests/float/string_format_modulo.py
@@ -7,9 +7,9 @@ print("%u" % 1.0)
 
 # these 3 have different behaviour in Python 3.x versions
 # uPy raises a TypeError, following Python 3.5 (earlier versions don't)
-#print("%x" % 18.0)
-#print("%o" % 18.0)
-#print("%X" % 18.0)
+# print("%x" % 18.0)
+# print("%o" % 18.0)
+# print("%X" % 18.0)
 
 print("%e" % 1.23456)
 print("%E" % 1.23456)
@@ -22,28 +22,28 @@ print("%06e" % float("inf"))
 print("%06e" % float("-inf"))
 print("%06e" % float("nan"))
 
-print("%02.3d" % 123) # prec > width
-print("%+f %+f" % (1.23, -1.23)) # float sign
-print("% f % f" % (1.23, -1.23)) # float space sign
-print("%0f" % -1.23) # negative number with 0 padding
+print("%02.3d" % 123)  # prec > width
+print("%+f %+f" % (1.23, -1.23))  # float sign
+print("% f % f" % (1.23, -1.23))  # float space sign
+print("%0f" % -1.23)  # negative number with 0 padding
 
 # numbers with large negative exponents
-print('%f' % 1e-10)
-print('%f' % 1e-20)
-print('%f' % 1e-50)
-print('%f' % 1e-100)
-print('%f' % 1e-300)
+print("%f" % 1e-10)
+print("%f" % 1e-20)
+print("%f" % 1e-50)
+print("%f" % 1e-100)
+print("%f" % 1e-300)
 
 # large decimal precision should be truncated and not overflow buffer
 # the output depends on the FP calculation so only first 2 digits are printed
 # (the 'g' with small e are printed using 'f' style, so need to be checked)
-print(('%.40f' % 1e-300)[:2])
-print(('%.40g' % 1e-1)[:2])
-print(('%.40g' % 1e-2)[:2])
-print(('%.40g' % 1e-3)[:2])
-print(('%.40g' % 1e-4)[:2])
+print(("%.40f" % 1e-300)[:2])
+print(("%.40g" % 1e-1)[:2])
+print(("%.40g" % 1e-2)[:2])
+print(("%.40g" % 1e-3)[:2])
+print(("%.40g" % 1e-4)[:2])
 
-print("%.0g" % 1) # 0 precision 'g'
+print("%.0g" % 1)  # 0 precision 'g'
 
-print('%.1e' % 9.99) # round up with positive exponent
-print('%.1e' % 0.999) # round up with negative exponent
+print("%.1e" % 9.99)  # round up with positive exponent
+print("%.1e" % 0.999)  # round up with negative exponent
diff --git a/tests/float/string_format_modulo2.py b/tests/float/string_format_modulo2.py
index f6b1ae537..b22021c5d 100644
--- a/tests/float/string_format_modulo2.py
+++ b/tests/float/string_format_modulo2.py
@@ -1,24 +1,26 @@
 # test formatting floats with large precision, that it doesn't overflow the buffer
 
+
 def test(num, num_str):
-    if num == float('inf') or num == 0.0 and num_str != '0.0':
+    if num == float("inf") or num == 0.0 and num_str != "0.0":
         # skip numbers that overflow or underflow the FP precision
         return
-    for kind in ('e', 'f', 'g'):
+    for kind in ("e", "f", "g"):
         # check precision either side of the size of the buffer (32 bytes)
         for prec in range(23, 36, 2):
-            fmt = '%.' + '%d' % prec + kind
+            fmt = "%." + "%d" % prec + kind
             s = fmt % num
             check = abs(float(s) - num)
             if num > 1:
                 check /= num
             if check > 1e-6:
-                print('FAIL', num_str, fmt, s, len(s), check)
+                print("FAIL", num_str, fmt, s, len(s), check)
+
 
 # check pure zero
-test(0.0, '0.0')
+test(0.0, "0.0")
 
 # check some powers of 10, making sure to include exponents with 3 digits
 for e in range(-8, 8):
     num = pow(10, e)
-    test(num, '1e%d' % e)
+    test(num, "1e%d" % e)
diff --git a/tests/float/string_format_modulo2_intbig.py b/tests/float/string_format_modulo2_intbig.py
index 9992ba65d..8110bc7f6 100644
--- a/tests/float/string_format_modulo2_intbig.py
+++ b/tests/float/string_format_modulo2_intbig.py
@@ -1,21 +1,23 @@
 # test formatting floats with large precision, that it doesn't overflow the buffer
 
+
 def test(num, num_str):
-    if num == float('inf') or num == 0.0 and num_str != '0.0':
+    if num == float("inf") or num == 0.0 and num_str != "0.0":
         # skip numbers that overflow or underflow the FP precision
         return
-    for kind in ('e', 'f', 'g'):
+    for kind in ("e", "f", "g"):
         # check precision either side of the size of the buffer (32 bytes)
         for prec in range(23, 36, 2):
-            fmt = '%.' + '%d' % prec + kind
+            fmt = "%." + "%d" % prec + kind
             s = fmt % num
             check = abs(float(s) - num)
             if num > 1:
                 check /= num
             if check > 1e-6:
-                print('FAIL', num_str, fmt, s, len(s), check)
+                print("FAIL", num_str, fmt, s, len(s), check)
+
 
 # check most powers of 10, making sure to include exponents with 3 digits
 for e in range(-101, 102):
     num = pow(10, e)
-    test(num, '1e%d' % e)
+    test(num, "1e%d" % e)
diff --git a/tests/float/string_format_modulo3.py b/tests/float/string_format_modulo3.py
index 5d26f2575..f9d9c43cd 100644
--- a/tests/float/string_format_modulo3.py
+++ b/tests/float/string_format_modulo3.py
@@ -1,3 +1,3 @@
 # uPy and CPython outputs differ for the following
-print("%.1g" % -9.9) # round up 'g' with '-' sign
-print("%.2g" % 99.9) # round up
+print("%.1g" % -9.9)  # round up 'g' with '-' sign
+print("%.2g" % 99.9)  # round up
diff --git a/tests/float/true_value.py b/tests/float/true_value.py
index df415f003..4c8d2e5c8 100644
--- a/tests/float/true_value.py
+++ b/tests/float/true_value.py
@@ -3,5 +3,5 @@
 if not 0.0:
     print("float 0")
 
-if not 0+0j:
+if not 0 + 0j:
     print("complex 0")