Backport PR #14169: Set instance on singleton configurable when creat… #18

	name: Run Downstream tests

	on:
	push:
	pull_request:
	# Run weekly on Monday at 1:23 UTC
	schedule:
	- cron: '23 1 * * 1'
	workflow_dispatch:

	permissions:
	contents: read

	jobs:
	test:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest]
	python-version: ["3.9"]
	include:
	- os: macos-latest
	python-version: "3.9"

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Update Python installer
	run: \|
	python -m pip install --upgrade pip setuptools wheel
	- name: Install ipykernel
	run: \|
	cd ..
	git clone https://github.com/ipython/ipykernel
	cd ipykernel
	pip install -e .[test]
	cd ..
	- name: Install and update Python dependencies
	run: \|
	python -m pip install --upgrade -e file://$PWD#egg=ipython[test]
	# we must install IPython after ipykernel to get the right versions.
	python -m pip install --upgrade --upgrade-strategy eager flaky ipyparallel
	python -m pip install --upgrade 'pytest<7' 'pytest_asyncio<0.21'
	- name: pytest
	env:
	COLUMNS: 120
	run: \|
	cd ../ipykernel
	pytest

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