The TitleKey extension is not compatible with sqlite. The installer ends up with a database error:
00:00:02.815 A database query error has occurred.
00:00:02.816 Query: CREATE TABLE titlekey (
00:00:02.817 tk_page INTEGER NOT NULL,
00:00:02.818 tk_namespace INTEGER NOT NULL,
00:00:02.819 tk_key TEXT NOT NULL,
00:00:02.819 PRIMARY KEY tk_page (tk_page),
00:00:02.820 INDEX name_key (tk_namespace, tk_key)
00:00:02.821 )
00:00:02.822 Function: DatabaseBase::sourceFile( /srv/ssd/jenkins-slave/workspace/mwext-TitleKey-testextensions-master/extensions/TitleKey/titlekey.sql )
00:00:02.823 Error: 1 near "tk_page": syntax error
Version: unspecified
Severity: normal