javax/swing/plaf/synth/SynthButtonUI/6276188/bug6276188.java fails to compile after JDK-8276058

The following test fails to compile in the JDK18 CI:

javax/swing/plaf/synth/SynthButtonUI/6276188/bug6276188.java

Here's a snippet from the log file:

----------System.out:(0/0)----------
----------System.err:(6/390)----------
/opt/mach5/mesos/work_dir/jib-master/install/jdk-18+25-1619/src.full/open/test/jdk/javax/swing/plaf/synth/SynthButtonUI/6276188/bug6276188.java:83: error: cannot find symbol
            Color color = robot.getPixelColor(p.x - OFFSET_X, p.y - OFFSET_y);
                                                                    ^
  symbol: variable OFFSET_y
  location: class bug6276188
1 error
result: Failed. Compilation failed: Compilation failed