diff --git a/core/src/test/java/io/parsingdata/metal/expression/value/reference/CurrentIterationTest.java b/core/src/test/java/io/parsingdata/metal/expression/value/reference/CurrentIterationTest.java
index fcad3d86..9f7e6e92 100644
--- a/core/src/test/java/io/parsingdata/metal/expression/value/reference/CurrentIterationTest.java
+++ b/core/src/test/java/io/parsingdata/metal/expression/value/reference/CurrentIterationTest.java
@@ -39,6 +39,7 @@
 public class CurrentIterationTest extends ParameterizedParse {
 
     public static final Token VALUE_EQ_ITERATION = def("value", con(1), eq(CURRENT_ITERATION));
+    public static final Token VALUE_NOT_EQ_ITERATION = def("value", con(1), not(eq(CURRENT_ITERATION)));
     public static final Token VALUE_EQ_255 = def("value", con(1), eq(con(255)));
 
     @Parameterized.Parameters(name="{0} ({4})")
@@ -48,8 +49,10 @@ public static Collection<Object[]> data() {
             { "[0, 1, 2, 3] repn=4(CURRENT_ITERATION)", repn(VALUE_EQ_ITERATION, con(4)), stream(0, 1, 2, 3), enc(), true },
             { "[255, 0, 1, 2, 3, 255] def(255), while<3(CURRENT_ITERATION), def (255)", seq(VALUE_EQ_255, whl(VALUE_EQ_ITERATION, not(eq(con(3)))), VALUE_EQ_255), stream(255, 0, 1, 2, 3, 255), enc(), true },
             { "[0, 0, 1, 2, 1, 0, 1, 2] repn=2(CURRENT_ITERATION, repn=3(CURRENT_ITERATION))", repn(seq(VALUE_EQ_ITERATION, repn(VALUE_EQ_ITERATION, con(3))), con(2)), stream(0, 0, 1, 2, 1, 0, 1, 2), enc(), true },
-            { "[0, 0] seq(CURRENT_ITERATION, ...)", seq(VALUE_EQ_ITERATION, VALUE_EQ_ITERATION), stream(0, 0), enc(), false },
-            { "[0] CURRENT_ITERATION", VALUE_EQ_ITERATION, stream(0), enc(), false }
+            { "[0, 1] seq(CURRENT_ITERATION, ...)", seq(VALUE_EQ_ITERATION, VALUE_EQ_ITERATION), stream(0, 1), enc(), false },
+            { "[0] CURRENT_ITERATION", VALUE_EQ_ITERATION, stream(0), enc(), false },
+            { "[0, 1] seq(!CURRENT_ITERATION, ...)", seq(VALUE_NOT_EQ_ITERATION, VALUE_NOT_EQ_ITERATION), stream(0, 1), enc(), true },
+            { "[0] !CURRENT_ITERATION", VALUE_NOT_EQ_ITERATION, stream(0), enc(), true }
         });
     }