test readme

tests/README.md

@@ -6,13 +6,7 @@ with a database, so your own postgres installation is not affected at all.
 
 To run the tests, go to the main directory of the project and do
 
-```sh
-export QGIS_TEST_VERSION=latest # See https://hub.docker.com/r/qgis/qgis/tags/
-export GITHUB_WORKSPACE=$PWD # only for local execution
-docker run -v ${GITHUB_WORKSPACE}:/usr/src -w /usr/src opengisch/qgis:${QGIS_TEST_VERSION} sh -c 'xvfb-run pytest-3'
-```
-
 In one line, removing all containers.
 ```sh
-QGIS_TEST_VERSION=latest GITHUB_WORKSPACE=$PWD docker run -v ${GITHUB_WORKSPACE}:/usr/src -w /usr/src opengisch/qgis:${QGIS_TEST_VERSION} sh -c 'xvfb-run pytest-3'
+docker run -v $PWD:/usr/src -w /usr/src opengisch/qgis:latest sh -c 'xvfb-run pytest-3'
 ```