Running several imageio tests with jake build from Oct 19, I'm getting exceptions like

java.lang.IllegalArgumentException: <unnamed module ...> is not a named module

The tests are trying to load IIOMetadataFormat and used to pass two weeks ago (definitely after JDK-8081729 closed in June).

RULE "javax/imageio/metadata/IIOMetadataFormat/runMetadataFormatThreadTest.sh" Exception java.lang.IllegalArgumentException: <unnamed module ...> is not a named module
RULE "javax/imageio/metadata/IIOMetadataFormat/UserPluginMetadataFormatTest.java" Exception java.lang.IllegalArgumentException: <unnamed module ...> is not a named module
RULE "javax/imageio/metadata/IIOMetadataFormat/runMetadataFormatTest.sh" Exception java.lang.IllegalArgumentException: <unnamed module ...> is not a named module
RULE "javax/imageio/plugins/external_plugin_tests/TestClassPathPlugin.sh" Exception java.lang.IllegalArgumentException: <unnamed module ...> is not a named module