Build fails on system without X

The failing test is: testFileContains(org.apache.jackrabbit.core.query.FulltextQueryTest)

caused by:

java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java:53)
at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:96)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at java.awt.Toolkit$2.run(Toolkit.java:821)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:804)
at java.awt.Toolkit.getEventQueue(Toolkit.java:1592)
at java.awt.EventQueue.isDispatchThread(EventQueue.java:666)
at javax.swing.SwingUtilities.isEventDispatchThread(SwingUtilities.java:1270)
at javax.swing.text.StyleContext.reclaim(StyleContext.java:437)
at javax.swing.text.StyleContext.addAttribute(StyleContext.java:294)
at javax.swing.text.StyleContext$NamedStyle.addAttribute(StyleContext.java:1486)
at javax.swing.text.StyleContext$NamedStyle.setName(StyleContext.java:1296)
at javax.swing.text.StyleContext$NamedStyle.<init>(StyleContext.java:1244)
at javax.swing.text.StyleContext.addStyle(StyleContext.java:90)
at javax.swing.text.StyleContext.<init>(StyleContext.java:70)
at javax.swing.text.DefaultStyledDocument.<init>(DefaultStyledDocument.java:88)
at org.apache.tika.parser.rtf.RTFParser.parse(RTFParser.java:42)