Below tests log a warning about ClassCastException being caught:

test.javafx.scene.control.ComboBoxTest
test.javafx.scene.control.TableViewMouseInputTest
test.javafx.scene.control.TreeTableViewMouseInputTest
test.javafx.scene.control.TableViewTest
test.javafx.scene.control.TreeTableViewTest

Nature of log :
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WARNING: Caught 'java.lang.ClassCastException: java.base/java.lang.String cannot be cast to javafx.graphics@10-ea/javafx.scene.paint.Color' while converting value for '-fx-background-color' from rule '*.combo-box-popup>*.list-view' in stylesheet file:/Users/XXX/jfx-dev/rt/build/shims/javafx.controls/com/sun/javafx/scene/control/skin/modena/modena.bss

Action needed :
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Check the validity of the log and correct the test/code