parent.groupId and parent.version missing

[col-panic]

[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] 'parent.groupId' is missing. @ line 5, column 11
[FATAL] 'parent.version' is missing. @ line 5, column 11
 @ 
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]   
[ERROR]   The project [unknown-group-id]:at.medevit.elexis.agenda.reminder.test:[unknown-version] (/Users/marco/Development/elexis-3.8/git/medelexis-3/tests/at.medevit.elexis.agenda.reminder.test/pom.xml) has 2 errors
[ERROR]     'parent.groupId' is missing. @ line 5, column 11
[ERROR]     'parent.version' is missing. @ line 5, column 11
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException

[col-panic]

The direct parent of this test plugin only contains

  <modelVersion>4.0.0</modelVersion>

  <artifactId>medelexis-3.tests</artifactId>
  <name>Medelexis tests</name>
  <packaging>pom</packaging>

so the respective missing values would have to be fetched from the parents parent.