diff --git a/skimage/exposure/tests/test_unwrap.py b/skimage/exposure/tests/test_unwrap.py
index 9798bba0..bb345b00 100644
--- a/skimage/exposure/tests/test_unwrap.py
+++ b/skimage/exposure/tests/test_unwrap.py
@@ -16,6 +16,7 @@ def test_unwrap2D():
     s = np.round(phi_unwrapped[0,0]/(2*np.pi))
     assert_array_almost_equal(phi, phi_unwrapped - s*2*np.pi)
 
+
 def test_unwrap2D_masked():
     x, y = np.ogrid[:8, :16]
     phi = 2*np.pi*(x*0.2 + y*0.1)
@@ -30,6 +31,7 @@ def test_unwrap2D_masked():
     s = np.round(phi_unwrapped_masked[0,0]/(2*np.pi))
     assert_array_almost_equal(phi + 2*np.pi*s, phi_unwrapped_masked)
 
+
 def test_unwrap3D():
     x, y, z = np.ogrid[:8, :12, :4]
     phi = 2*np.pi*(x*0.2 + y*0.1 + z*0.05)
@@ -39,6 +41,7 @@ def test_unwrap3D():
     s = np.round(phi_unwrapped[0,0]/(2*np.pi))
     assert_array_almost_equal(phi, phi_unwrapped - s*2*np.pi)
 
+
 def test_unwrap3D_masked():
     x, y, z = np.ogrid[:8, :12, :4]
     phi = 2*np.pi*(x*0.2 + y*0.1 + z*0.05)
@@ -124,5 +127,6 @@ def unwrap_plots():
     plt.draw()
     plt.show()
 
+
 if __name__=="__main__":
     run_module_suite()