diff --git a/tests/test_common.py b/tests/test_common.py
index fe174a2..28e5572 100644
--- a/tests/test_common.py
+++ b/tests/test_common.py
@@ -55,6 +55,7 @@ def test_saturation():
     except common.SaturationError as e:
         assert e.args == (max(x),)
 
+
 def test_izip():
     x = range(10)
     y = range(-10, 0)
diff --git a/tests/test_equalizer.py b/tests/test_equalizer.py
index d62a22b..9e31315 100644
--- a/tests/test_equalizer.py
+++ b/tests/test_equalizer.py
@@ -7,6 +7,7 @@ from amodem import equalizer
 from amodem import config
 config = config.fastest()
 
+
 def assert_approx(x, y, e=1e-12):
     assert norm(x - y) < e * norm(x)
 
diff --git a/tests/test_framing.py b/tests/test_framing.py
index 3a13074..04cdcdc 100644
--- a/tests/test_framing.py
+++ b/tests/test_framing.py
@@ -34,16 +34,17 @@ def test_main(data):
     decoded = framing.decode(encoded)
     assert bytearray(decoded) == data
 
+
 def test_fail():
     encoded = list(framing.encode(''))
     encoded[-1] = not encoded[-1]
     with pytest.raises(ValueError):
         list(framing.decode(encoded))
 
+
 def test_missing():
     f = framing.Framer()
     with pytest.raises(ValueError):
         list(f.decode(b'\x00'))
     with pytest.raises(ValueError):
         list(f.decode(b'\x01\x02\x03\x04'))
-