diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a85e3c8fb75..0159ac34db3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        name: [py35, py36, py37]
+        name: [py35, py36, py37, py38, py39]
         include:
         - name: py35
           python: 3.5
@@ -19,6 +19,15 @@ jobs:
         - name: py37
           python: 3.7
           docutils: du14
+        - name: py38
+          python: 3.8
+          docutils: du15
+        - name: py39
+          python: 3.9
+          docutils: du16
+          coverage: "--cov ./ --cov-append --cov-config setup.cfg"
+    env:
+      PYTEST_ADDOPTS: ${{ matrix.coverage }}
 
     steps:
     - uses: actions/checkout@v2
@@ -31,9 +40,12 @@ jobs:
     - name: Install graphviz
       run: sudo apt-get install graphviz
     - name: Install dependencies
-      run: pip install -U tox
+      run: pip install -U tox codecov
     - name: Run Tox
       run: tox -e ${{ matrix.docutils }} -- -vv
+    - name: codecov
+      uses: codecov/codecov-action@v1
+      if: matrix.coverage
 
   windows:
     runs-on: windows-latest
diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
new file mode 100644
index 00000000000..d7a7c95f14b
--- /dev/null
+++ b/.github/workflows/nodejs.yml
@@ -0,0 +1,21 @@
+name: CI (node.js)
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      node-version: 10.7
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ env.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ env.node-version }}
+    - run: npm install
+    - name: Run headless test
+      uses: GabrielBB/xvfb-action@v1
+      with:
+        run: npm test
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 4123ba6b59a..00000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,34 +0,0 @@
-os: linux
-dist: xenial
-language: python
-cache: pip
-
-env:
-  global:
-    - PYTHONFAULTHANDLER=x
-    - SKIP_LATEX_BUILD=1
-    - IS_PYTHON=true
-
-jobs:
-  include:
-    - python: '3.8'
-      env:
-        - TOXENV=du15
-        - PYTEST_ADDOPTS="--cov ./ --cov-append --cov-config setup.cfg"
-
-    - language: node_js
-      node_js: '10.7'
-      env: IS_PYTHON=false
-      services: xvfb
-
-install:
-  - "sudo apt-get install graphviz"
-  - if [ $IS_PYTHON = true ]; then pip install -U tox codecov; fi
-  - if [ $IS_PYTHON = false ]; then npm install; fi
-
-script:
-  - if [ $IS_PYTHON = true ]; then tox -- -vv; fi
-  - if [ $IS_PYTHON = false ]; then npm test; fi
-
-after_success:
-  - if [[ -e .coverage ]]; then codecov -e $TOXENV; fi
diff --git a/CHANGES b/CHANGES
index 37cb75a9cfc..55c0a833e52 100644
--- a/CHANGES
+++ b/CHANGES
@@ -26,6 +26,7 @@ Bugs fixed
 ----------
 
 * #7613: autodoc: autodoc does not respect __signature__ of the class
+* #4606: autodoc: the location of the warning is incorrect for inherited method
 * #8105: autodoc: the signature of class constructor is incorrect if the class
   is decorated
 
diff --git a/doc/internals/contributing.rst b/doc/internals/contributing.rst
index 1f4a31013e0..a52e6e72d6d 100644
--- a/doc/internals/contributing.rst
+++ b/doc/internals/contributing.rst
@@ -272,9 +272,9 @@ identifier and put ``sphinx.po`` in there.  Don't forget to update the possible
 values for :confval:`language` in ``doc/usage/configuration.rst``.
 
 The Sphinx core messages can also be translated on `Transifex
-<https://www.transifex.com/sphinx-doc/>`_.  There ``tx`` client tool, which is
-provided by the ``transifex_client`` Python package, can be used to pull
-translations in ``.po`` format from Transifex.  To do this, go to
+<https://www.transifex.com/sphinx-doc/sphinx-1/>`_.  There ``tx`` client tool,
+which is provided by the ``transifex_client`` Python package, can be used to
+pull translations in ``.po`` format from Transifex.  To do this, go to
 ``sphinx/locale`` and then run ``tx pull -f -l LANG`` where ``LANG`` is an
 existing language identifier.  It is good practice to run ``python setup.py
 update_catalog`` afterwards to make sure the ``.po`` file has the canonical
diff --git a/setup.py b/setup.py
index 8505d267972..27bbb3ae038 100644
--- a/setup.py
+++ b/setup.py
@@ -203,6 +203,7 @@ def _run_domain_js(self, domain):
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
         'Framework :: Setuptools Plugin',
diff --git a/sphinx/ext/autodoc/__init__.py b/sphinx/ext/autodoc/__init__.py
index 0d26a4f2cec..92b3ad3e710 100644
--- a/sphinx/ext/autodoc/__init__.py
+++ b/sphinx/ext/autodoc/__init__.py
@@ -543,9 +543,18 @@ def process_doc(self, docstrings: List[List[str]]) -> Iterator[str]:
             yield from docstringlines
 
     def get_sourcename(self) -> str:
+        if (getattr(self.object, '__module__', None) and
+                getattr(self.object, '__qualname__', None)):
+            # Get the correct location of docstring from self.object
+            # to support inherited methods
+            fullname = '%s.%s' % (self.object.__module__, self.object.__qualname__)
+        else:
+            fullname = self.fullname
+
         if self.analyzer:
-            return '%s:docstring of %s' % (self.analyzer.srcname, self.fullname)
-        return 'docstring of %s' % self.fullname
+            return '%s:docstring of %s' % (self.analyzer.srcname, fullname)
+        else:
+            return 'docstring of %s' % fullname
 
     def add_content(self, more_content: Any, no_docstring: bool = False) -> None:
         """Add content from docstrings, attribute documentation and user."""
diff --git a/sphinx/util/inspect.py b/sphinx/util/inspect.py
index 4f8e15c0464..27f478675e1 100644
--- a/sphinx/util/inspect.py
+++ b/sphinx/util/inspect.py
@@ -62,14 +62,6 @@ def getargspec(func: Callable) -> Any:
     methods."""
     warnings.warn('sphinx.ext.inspect.getargspec() is deprecated',
                   RemovedInSphinx50Warning, stacklevel=2)
-    # On 3.5+, signature(int) or similar raises ValueError. On 3.4, it
-    # succeeds with a bogus signature. We want a TypeError uniformly, to
-    # match historical behavior.
-    if (isinstance(func, type) and
-            is_builtin_class_method(func, "__new__") and
-            is_builtin_class_method(func, "__init__")):
-        raise TypeError(
-            "can't compute signature for built-in type {}".format(func))
 
     sig = inspect.signature(func)
 
diff --git a/tox.ini b/tox.ini
index a612999793e..316655d20a0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,7 +26,7 @@ extras =
     test
 setenv =
     PYTHONWARNINGS = all,ignore::ImportWarning:importlib._bootstrap_external,ignore::DeprecationWarning:site,ignore::DeprecationWarning:distutils
-    PYTEST_ADDOPTS = --color yes
+    PYTEST_ADDOPTS = {env:PYTEST_ADDOPTS:} --color yes
 commands=
     pytest --durations 25 {posargs}