tgtName := strings.TrimPrefix(k, envVarPrefix)
			if tgtName != "" {
				if v, ok := filterMap[k]; ok {
					if strings.HasPrefix(envVarPrefix, v) {
						filterMap[k] = envVarPrefix
					}
				} else {
					filterMap[k] = envVarPrefix
				}
			}
		}
	}

	for k, v := range filterMap {
		seen.Add(strings.TrimPrefix(k, v))
	}

	seen.Remove(Default)

    suite.addTest(filterSortedMapSuite());
    suite.addTest(filterNavigableMapSuite());
    return suite;
  }

  static TestSuite filterMapSuite() {
    TestSuite suite = new TestSuite("FilterMap");
    suite.addTest(
        MapTestSuiteBuilder.using(
                new TestStringMapGenerator() {
                  @Override