Fixing directory path

Author: bsipocz

tox.ini

@@ -43,8 +43,8 @@ commands =
     pip freeze
 # FIXME: there are too many failures from the docs example gallery ignore docs for now
 # !cov: pytest {toxinidir}/astroquery {toxinidir}/docs {posargs}
-    !cov: pytest {toxinidir}/astroquery {posargs}
-    cov:  pytest {toxinidir}/astroquery --cov {toxinidir}/astroquery {posargs}
+    !cov: pytest --pyargs astroquery {posargs}
+    cov:  pytest --pyargs astroquery --cov astroquery {posargs}
     cov: coverage xml -o {toxinidir}/coverage.xml
 
 [testenv:codestyle]