vscode-python: Repeatedly prompts: Test framework pytest is not installed. Install?

Environment data

• VS Code version: Version: 1.27.1 Commit: 5944e81f3c46a3938a82c701f96d7a59b074cfdc Date: 2018-09-06T09:21:47.222Z Electron: 2.0.7 Chrome: 61.0.3163.100 Node.js: 8.9.3 V8: 6.1.534.41 Architecture: x64

• Extension version (available under the Extensions sidebar): 2018.8.0

• OS and version: Linux Ubuntu 16.04

• Python version (& distribution if applicable, e.g. Anaconda): Python 3.5.2

• Type of virtual environment used (N/A | venv | virtualenv | conda | …): pipenv

• Relevant/affected Python packages and their versions: XXX

Actual behavior

VSCode repeatedly asks: Test framework pytest is not installed. Install?

Yes is selected and it used pipenv install --dev pytest to install which succeeds.

Have said yes several times and yet it is still unable to find pytest.

Expected behavior

After installing pytest it should detect pytest and detect test folders.

Steps to reproduce:

1. Instal vscode-python extension into folder that has pytests in “tests” folder.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

No relevent logs can be seen from the extension.

Output from Console under the Developer Tools panel (toggle Developer Tools on under Help)

XXX