only preprocess if the preprocessor is enabled

2 files changed, 27 insertions, 5 deletions

diff --git a/sphinx/ext/napoleon/docstring.py b/sphinx/ext/napoleon/docstring.py
index 29799cb06..a629f147f 100644
--- a/sphinx/ext/napoleon/docstring.py
+++ b/sphinx/ext/napoleon/docstring.py
@@ -1104,11 +1104,12 @@ class NumpyDocstring(GoogleDocstring):
             _name, _type = line, ''
         _name, _type = _name.strip(), _type.strip()
         _name = self._escape_args_and_kwargs(_name)
-        _type = _convert_numpy_type_spec(
-            _type,
-            location=self._get_location(),
-            translations=self._config.napoleon_type_aliases or {},
-        )
+        if self._config.napoleon_enable_type_preprocessor:
+            _type = _convert_numpy_type_spec(
+                _type,
+                location=self._get_location(),
+                translations=self._config.napoleon_type_aliases or {},
+            )
 
         if prefer_type and not _type:
             _type, _name = _name, _type
diff --git a/tests/test_ext_napoleon_docstring.py b/tests/test_ext_napoleon_docstring.py
index 7eb908058..06a4a0c1a 100644
--- a/tests/test_ext_napoleon_docstring.py
+++ b/tests/test_ext_napoleon_docstring.py
@@ -1317,6 +1317,27 @@ class NumpyDocstringTest(BaseDocstringTest):
             expected = dedent(expected)
             self.assertEqual(expected, actual)
 
+    def test_type_preprocessor(self):
+        docstring = dedent("""
+        Single line summary
+
+        Parameters
+        ----------
+        arg1:str
+            Extended
+            description of arg1
+        """)
+
+        config = Config(napoleon_preprocess_types=False, napoleon_use_param=False)
+        actual = str(NumpyDocstring(docstring, config))
+        expected = dedent("""
+        Single line summary
+
+        :Parameters: **arg1** (*str*) -- Extended
+                     description of arg1
+        """)
+        self.assertEqual(expected, actual)
+
     def test_parameters_with_class_reference(self):
         docstring = """\
 Parameters