The `AbstractXContentFilteringTestCase#testDotsAndDoubleWildcardInExcludedFieldName` test (all subclasses) is failing. It is no longer failing due to invalid JSON (that was fixed by the upgrade to jackson 2.13.0), but it looks like it is failing to apply exclusions correctly.
libs/x-content/src/test/java/org/elasticsearch/xcontent/support/filtering/AbstractXContentFilteringTestCase.java
public void testSingleFieldObject() throws IOException {
        Builder sample = builder -> builder.startObject().startObject("foo").field("bar", "test").endObject().endObject();
        Builder expected = builder -> builder.startObject().startObject("foo").field("bar", "test").endObject().endObject();
        testFilter(expected, sample, singleton("foo.bar"), emptySet());
        testFilter(expected, sample, emptySet(), singleton("foo.baz"));
        testFilter(expected, sample, singleton("foo"), singleton("foo.baz"));
        expected = builder -> builder.startObject().endObject();
        testFilter(expected, sample, emptySet(), singleton("foo.bar"));
        testFilter(expected, sample, singleton("foo"), singleton("foo.b*"));
    }
    public void testDotInIncludedFieldNameUnconfigured() throws IOException {
        testFilter(
            builder -> builder.startObject().endObject(),
            builder -> builder.startObject().field("foo.bar", "test").endObject(),