testing Step in Model test

from django.test import TestCase
from django.utils import timezone

from .models import Course
from .models import Step

class CourseModelTests(TestCase):
    def test_course_creation(self):
        course = Course.objects.create(
            title="Pyhton Reqular Expressions",
            description="Learn to write regular expressions in Pyhton"
        )

        now = timezone.now()
        self.assertLess(course.created_at, now)

class StepModelTests(TestCase):
    def test_step_creation(self):
        step = Step.objects.create(
            title="Using the shell",
            description="Learn how to use Python's shell to play with the language and help",
            content=['Launch the shell with "python"', 
                     'You can exit the shell by entering "exit" or "quit".', 
                     'You can also exit the shell by pressing CTRL and D.']
            order=0, 
            course=Course()
        )

File "/home/treehouse/workspace/learning_site/courses/tests.py", line 25                       
    order=0,                                                                                     
        ^                                                                                        
SyntaxError: invalid syntax                                                                      


----------------------------------------------------------------------                           
Ran 1 test in 0.001s                                                                             

FAILED (errors=1)                                                                                
Destroying test database for alias 'default'...