Use parametrize instead of TestCase

test/test_api/test_classes.py

@@ -216,35 +216,22 @@ def test_param_endings(Script):
     assert [p.description for p in sig.params] == ['param a', 'param b=5', 'param c=""']
 
 
-class TestIsDefinition(TestCase):
+@pytest.mark.parametrize(
-    @pytest.fixture(autouse=True)
+    'code, index, name, is_definition', [
-    def init(self, environment):
+        ('name', 0, 'name', False),
-        self.environment = environment
+        ('a = f(x)', 0, 'a', True),
-
+        ('a = f(x)', 1, 'f', False),
-    def _def(self, source, index=-1):
+        ('a = f(x)', 2, 'x', False),
-        return names(
+    ]
-            dedent(source),
+)
+def test_is_definition(names, code, index, name, is_definition):
+    d = names(
+        dedent(code),
         references=True,
         all_scopes=True,
-            environment=self.environment
     )[index]
-
+    assert d.name == name
-    def test_name(self):
+    assert d.is_definition() == is_definition
-        d = self._def('name')
-        assert d.name == 'name'
-        assert not d.is_definition()
-
-    def test_stmt(self):
-        src = 'a = f(x)'
-        d = self._def(src, 0)
-        assert d.name == 'a'
-        assert d.is_definition()
-        d = self._def(src, 1)
-        assert d.name == 'f'
-        assert not d.is_definition()
-        d = self._def(src)
-        assert d.name == 'x'
-        assert not d.is_definition()
 
 
 @pytest.mark.parametrize(