Use the Script fixture more generally

test/test_api/test_usages.py

@@ -1,6 +1,3 @@
-import jedi
-
-
-def test_import_usage():
-    s = jedi.Script("from .. import foo", line=1, column=18, path="foo.py")
+def test_import_usage(Script):
+    s = Script("from .. import foo", line=1, column=18, path="foo.py")
     assert [usage.line for usage in s.usages()] == [1]