diff --git a/src/test/java/de/neemann/digital/fsm/TransitionTableCreatorTest.java b/src/test/java/de/neemann/digital/fsm/TransitionTableCreatorTest.java
index 2cf914c40..5b9897862 100644
--- a/src/test/java/de/neemann/digital/fsm/TransitionTableCreatorTest.java
+++ b/src/test/java/de/neemann/digital/fsm/TransitionTableCreatorTest.java
@@ -28,7 +28,7 @@ public class TransitionTableCreatorTest extends TestCase {
         new MinimizerQuineMcCluskey().minimize(tt.getVars(), tt.getResult(0), "Y", el);
 
         assertEquals(1, el.getResults().size());
-        assertEquals("not(Q0_n)", el.getFirst().toString());
+        assertEquals("not(Q^0_n)", el.getFirst().toString());
     }
 
     public void testBlinkOnOff() throws ExpressionException, FiniteStateMachineException, FormatterException {
@@ -45,7 +45,7 @@ public class TransitionTableCreatorTest extends TestCase {
         new MinimizerQuineMcCluskey().minimize(tt.getVars(), tt.getResult(0), "Y", el);
 
         assertEquals(1, el.getResults().size());
-        assertEquals("or(and(not(Q0_n),Run),and(Q0_n,not(Run)))", el.getFirst().toString());
+        assertEquals("or(and(not(Q^0_n),Run),and(Q^0_n,not(Run)))", el.getFirst().toString());
     }
 
     public void testBlinkResult() throws ExpressionException, FiniteStateMachineException, FormatterException {
@@ -62,13 +62,13 @@ public class TransitionTableCreatorTest extends TestCase {
         new MinimizerQuineMcCluskey().minimize(tt.getVars(), tt.getResult(0), "Y", el);
 
         assertEquals(1, el.getResults().size());
-        assertEquals("not(Q0_n)", el.getFirst().toString());
+        assertEquals("not(Q^0_n)", el.getFirst().toString());
 
         el = new ExpressionListenerStore(null);
         new MinimizerQuineMcCluskey().minimize(tt.getVars(), tt.getResult(1), "Y", el);
 
         assertEquals(1, el.getResults().size());
-        assertEquals("Q0_n", el.getFirst().toString());
+        assertEquals("Q^0_n", el.getFirst().toString());
     }
 
     public void testBlinkNotDeterministic() throws ExpressionException {
@@ -148,13 +148,13 @@ public class TransitionTableCreatorTest extends TestCase {
         new MinimizerQuineMcCluskey().minimize(tt.getVars(), tt.getResult(0), "Y", el);
 
         assertEquals(1, el.getResults().size());
-        assertEquals("and(not(Q0_n),R)", el.getFirst().toString());
+        assertEquals("and(not(Q^0_n),R)", el.getFirst().toString());
 
         el = new ExpressionListenerStore(null);
         new MinimizerQuineMcCluskey().minimize(tt.getVars(), tt.getResult(1), "Y", el);
 
         assertEquals(1, el.getResults().size());
-        assertEquals("and(not(Q0_n),R)", el.getFirst().toString());
+        assertEquals("and(not(Q^0_n),R)", el.getFirst().toString());
 
     }