Fix tox settings

test-requirements.txt

@@ -1,4 +1,4 @@
 pytest
 pytest-cov
-pytest-pep8
+flake8
 coverage

tox.ini

@@ -7,13 +7,13 @@ usedevelop = True
 basepython = python3
 usedevelop=True
 setenv = COVERAGE_FILE = .coverage
-commands = py.test --cov=pygtktalog --cov-report=term-missing
+commands = py.test --cov=pycatalog --cov-report=term-missing
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 [testenv:pep8]
 usedevelop=True
-commands = py.test --pep8 -m pep8
+commands = flake8
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt