Test.

h2/src/test/org/h2/test/synth/TestFuzzOptimizations.java

@@ -40,7 +40,9 @@ public class TestFuzzOptimizations extends TestBase {
     public void test() throws Exception {
         deleteDb("optimizations");
         conn = getConnection("optimizations");
+        if (!config.diskResult) {
             testIn();
+        }
         testGroupSorted();
         testInSelect();
         conn.close();