diff --git a/test/test_data_table.py b/test/test_data_table.py
index 721fdec88a1522a76d407b36cfa0a6c59f7c6c92..0b3343e51fca990d9a81fa700565f05958133edb 100644
--- a/test/test_data_table.py
+++ b/test/test_data_table.py
@@ -1,6 +1,7 @@
 from __future__ import division
 # data from Wikipedia "join" article
 
+
 def get_dept_table():
     from pytools.datatable import DataTable
     dept_table = DataTable(["id", "name"])
@@ -10,6 +11,7 @@ def get_dept_table():
     dept_table.insert_row((35, "Marketing"))
     return dept_table
 
+
 def get_employee_table():
     from pytools.datatable import DataTable
     employee_table = DataTable(["lastname", "dept"])
@@ -21,13 +23,15 @@ def get_employee_table():
     employee_table.insert_row(("Smith", 34))
     return employee_table
 
+
 def test_len():
     et = get_employee_table()
     assert len(et) == 6
 
+
 def test_iter():
     et = get_employee_table()
-    
+
     count = 0
     for row in et:
         count += 1
@@ -35,20 +39,24 @@ def test_iter():
 
     assert count == 6
 
+
 def test_insert_and_get():
     et = get_employee_table()
     et.insert(dept=33, lastname="Kloeckner")
     assert et.get(lastname="Kloeckner").dept == 33
 
+
 def test_filtered():
     et = get_employee_table()
     assert len(et.filtered(dept=33)) == 2
     assert len(et.filtered(dept=34)) == 2
 
+
 def test_sort():
     et = get_employee_table()
     et.sort(["lastname"])
-    assert et.column_data("dept") == [36,33,31,34,34,33]
+    assert et.column_data("dept") == [36, 33, 31, 34, 34, 33]
+
 
 def test_aggregate():
     et = get_employee_table()
@@ -60,6 +68,7 @@ def test_aggregate():
         for lastname in lastnames:
             assert et.get(lastname=lastname).dept == dept
 
+
 def test_aggregate_2():
     from pytools.datatable import DataTable
     tbl = DataTable(["step", "value"], zip(range(20), range(20)))
@@ -67,6 +76,7 @@ def test_aggregate_2():
     assert agg.column_data("step") == range(20)
     assert agg.column_data("value") == range(20)
 
+
 def test_join():
     et = get_employee_table()
     dt = get_dept_table()
@@ -83,4 +93,3 @@ def test_join():
 
     outer_joined = et.join("dept", "id", dt, outer=True)
     assert len(outer_joined) == len(et)+1
-