diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 00000000..5374960a
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,14 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.py]
+indent_size = 4
+
+[*.md]
+indent_size = 2
diff --git a/.travis.yml b/.travis.yml
index d7c418a4..89102f4a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ env:
 matrix:
   include:
     - python: 3.8
-      script: 
+      script:
         - 'pip install coverage'
         - 'coverage run --source jedi -m pytest'
         - 'coverage report'
@@ -31,7 +31,7 @@ matrix:
         - 'pip install .[qa]'
       script:
         # Ignore F401, which are unused imports. flake8 is a primitive tool and is sometimes wrong.
-        - 'flake8 --extend-ignore F401 {posargs:jedi}'
+        - 'flake8 --extend-ignore F401 jedi setup.py'
 install:
     - sudo apt-get -y install python3-venv
     - pip install .[testing]
diff --git a/jedi/inference/base_value.py b/jedi/inference/base_value.py
index c0f960d4..c5b2cec0 100644
--- a/jedi/inference/base_value.py
+++ b/jedi/inference/base_value.py
@@ -111,7 +111,7 @@ class HelperValueMixin(object):
                         .py__getattribute__('__anext__').execute_with_values()
                         .py__getattribute__('__await__').execute_with_values()
                         .py__stop_iteration_returns()
-                )  # noqa
+                )  # noqa: E124
             ])
         return self.py__iter__(contextualized_node)
 
diff --git a/jedi/inference/gradual/annotation.py b/jedi/inference/gradual/annotation.py
index fa3aa5ae..eadcfc2e 100644
--- a/jedi/inference/gradual/annotation.py
+++ b/jedi/inference/gradual/annotation.py
@@ -53,8 +53,10 @@ def _infer_annotation_string(context, string, index=None):
     value_set = context.infer_node(node)
     if index is not None:
         value_set = value_set.filter(
-            lambda value: value.array_type == 'tuple'  # noqa
-                            and len(list(value.py__iter__())) >= index
+            lambda value: (
+                value.array_type == 'tuple'
+                and len(list(value.py__iter__())) >= index
+            )
         ).py__simple_getitem__(index)
     return value_set
 
diff --git a/jedi/settings.py b/jedi/settings.py
index 8e6b7bef..c31a474a 100644
--- a/jedi/settings.py
+++ b/jedi/settings.py
@@ -69,8 +69,11 @@ Adds an opening bracket after a function for completions.
 # ----------------
 
 if platform.system().lower() == 'windows':
-    _cache_directory = os.path.join(os.getenv('LOCALAPPDATA') or 
-                                    os.path.expanduser('~'), 'Jedi', 'Jedi')
+    _cache_directory = os.path.join(
+        os.getenv('LOCALAPPDATA') or os.path.expanduser('~'),
+        'Jedi',
+        'Jedi',
+    )
 elif platform.system().lower() == 'darwin':
     _cache_directory = os.path.join('~', 'Library', 'Caches', 'Jedi')
 else:
diff --git a/setup.cfg b/setup.cfg
index 39633dc1..6929ce30 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -13,6 +13,8 @@ ignore =
   E721,
   # Line break before binary operator
   W503,
+  # Single letter loop variables are often fine
+  E741,
 exclude = jedi/third_party/* .tox/*
 
 [pycodestyle]
diff --git a/setup.py b/setup.py
index 044d7d5a..bf9be8c2 100755
--- a/setup.py
+++ b/setup.py
@@ -45,7 +45,7 @@ setup(name='jedi',
               'Django<3.1',  # For now pin this.
           ],
           'qa': [
-              'flake8==3.7.9',
+              'flake8==3.8.3',
           ],
       },
       package_data={'jedi': ['*.pyi', 'third_party/typeshed/LICENSE',
diff --git a/test/test_api/test_call_signatures.py b/test/test_api/test_call_signatures.py
index 59e3a640..664eec86 100644
--- a/test/test_api/test_call_signatures.py
+++ b/test/test_api/test_call_signatures.py
@@ -121,11 +121,8 @@ def test_multiple_signatures(Script):
 
 
 def test_get_signatures_whitespace(Script):
-    s = dedent("""\
-    abs( 
-    def x():
-        pass
-    """)  # noqa
+    # note: trailing space after 'abs'
+    s = 'abs( \ndef x():\n    pass\n'
     assert_signature(Script, s, 'abs', 0, line=1, column=5)