Both QGIS and QGIS server are being tested via all kind of ways.

From build tests (github workflows) and code unit tests to OGC conformance testing.

Github workflows


Unit tests

See Unit testing

OGC Conformance testing

See OGC conformance testing for more information and how to run these tests yourself.

Recent tests output can be found here: For latest WMS 1.3.0 test see and for WFS 1.1.0 see