What am i doing wrong?

I'm trying to design a program that times appending #s vs inserting them. I am able to get the first test to run but after that, nothing. Can anybody help?

import timeit

#Tests for appending in different ranges

def test1A():
    l = []
    for i in range(100):
        l.append(i)
def test2A():
    l = []
    for i in range(1000):
        l.append(i)
def test3A():
    l = []
    for i in range(10000):
        l.append(i)
def test4A():
    l = []
    for i in range(100000):
        l.append(i)
def test5A():
    l = []
    for i in range(1000000):
        l.append(i)
def test6A():
    l = []
    for i in range(1000):
        l.append(i)

#Tests for inserting in different ranges

def test1I():
    l = []
    for i in range(100):
        l.insert(i)
def test2I():
    l = []
    for i in range(1000):
        l.insert(i)
def test3I():
    l = []
    for i in range(10000):
        l.insert(i)
def test4I():
    l = []
    for i in range(100000):
        l.insert(i)
def test5I():
    l = []
    for i in range(1000000):
        l.insert(i)
def test6I():
    l = []
    for i in range(10000000):
        l.insert(i)

#Timers for appending and inserting

def main():
    
    t1a = timeit.Timer("test1A()", "from __main__ import test1A")
    print("Test1A took ", t1a.timeit(number=100), " milliseconds")
    t1i = timeit.Timer("test1I()", "from __main__ import test1I")
    print("Test1I took ", t1i.timeit(number=100), " milliseconds")
    t2a = timeit.Timer("test2A()", "from __main__ import test2A")
    print("Test2A took ", t2a.timeit(number=1000), " milliseconds")
    t2i = timeit.Timer("test2I()", "from __main__ import test2I")
    print("Test2I took ", t2i.timeit(number=1000), " milliseconds")
    t3a = timeit.Timer("test3A()", "from __main__ import test3A")
    print("Test3A took ", t3a.timeit(number=10000), " milliseconds")
    t3i = timeit.Timer("test3I()", "from __main__ import test3I")
    print("Test3I took ", t3i.timeit(number=10000), " milliseconds")
    t4a = timeit.Timer("test4A()", "from __main__ import test4A")
    print("Test4A took ", t4a.timeit(number=100000), " milliseconds")
    t4i = timeit.Timer("test4I()", "from __main__ import test4I")
    print("Test4I took ", t4i.timeit(number=100000), " milliseconds")
    t5a = timeit.Timer("test5A()", "from __main__ import test5A")
    print("Test5A took ", t5a.timeit(number=1000000), " milliseconds")
    t5i = timeit.Timer("test5I()", "from __main__ import test5I")
    print("Test5I took ", t5i.timeit(number=1000000), " milliseconds")
    t6a = timeit.Timer("test6A()", "from __main__ import test6A")
    print("Test6A took ", t6a.timeit(number=10000000), " milliseconds")
    t6i = timeit.Timer("test6I()", "from __main__ import test6I")
    print("Test6I took ", t6i.timeit(number=10000000), " milliseconds")

here is the error i get...

 Test1A took  0.0026590783779719637  milliseconds
Traceback (most recent call last):
  File "<pyshell#14>", line 1, in <module>
    main()
  File "C:/Documents and Settings/delvel/Desktop/lab2.py", line 65, in main
    print("Test1I took ", t1i.timeit(number=100), " milliseconds")
  File "C:\Python33\lib\timeit.py", line 190, in timeit
    timing = self.inner(it, self.timer)
  File "<timeit-src>", line 6, in inner
  File "C:/Documents and Settings/delvel/Desktop/lab2.py", line 36, in test1I
    l.insert(i)
TypeError: insert() takes exactly 2 arguments (1 given)