Fix tests

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "test/repos/flask"]
 	path = test/repos/flask
-	url = [email protected]:pallets/flask.git
+	url = [email protected]:sourcegraph/flask.git
 [submodule "test/repos/cpython"]
 	path = test/repos/cpython
 	url = [email protected]:python/cpython.git

.python-version

@@ -0,0 +1 @@
+3.6.4

README.md

@@ -10,8 +10,8 @@ This is a language server for Python that adheres to the [Language Server Protoc
 
 You'll need Python version 3.6 or greater or [pyenv](https://github.com/pyenv/pyenv) installed. You will also need [pipenv](https://github.com/pypa/pipenv) installed:
 
-1. `pipenv install`
-2. `pipenv run python python-langserver.py --mode=tcp --addr=2087`
+1.  `pipenv install`
+2.  `pipenv run python python-langserver.py --mode=tcp --addr=2087`
 
 To try it in [Visual Studio Code](https://code.visualstudio.com), install the [vscode-client](https://github.com/sourcegraph/langserver/tree/master/vscode-client) extension and then open up a `.py` file.
 
@@ -20,3 +20,11 @@ To try it in [Visual Studio Code](https://code.visualstudio.com), install the [v
 Run `make test`.
 
 The tests require `pytest`. Note that some tests may fail if you're using `virtualenv` instead of the system Python.
+
+Ensure you're using the correct Python version for this project (3.6.4). Using an incorrect version may cause local failures for tests related to the Python standard library. Use [`pyenv`](https://github.com/pyenv/pyenv) to easily switch to the correct version:
+
+```
+pyenv install
+pyenv local # should show 3.6.4
+pyenv version # should show 3.6.4 - you're good to go!
+```

test/test_flask.py

@@ -4,7 +4,7 @@
 
 flask_workspace = Harness("repos/flask")
 flask_workspace.initialize(
-    "git://github.com/pallets/flask?" + str(uuid.uuid4()))
+    "git://github.com/sourcegraph/flask?" + str(uuid.uuid4()))
 
 
 def test_x_packages():