diff --git a/src/test/java/de/neemann/digital/integration/TestExamples.java b/src/test/java/de/neemann/digital/integration/TestExamples.java
index 4798a1d7d..4891e76c6 100644
--- a/src/test/java/de/neemann/digital/integration/TestExamples.java
+++ b/src/test/java/de/neemann/digital/integration/TestExamples.java
@@ -49,8 +49,8 @@ public class TestExamples extends TestCase {
      */
     public void testTestExamples() throws Exception {
         File examples = new File(Resources.getRoot(), "/dig/test");
-        assertEquals(193, new FileScanner(this::check).scan(examples));
-        assertEquals(181, testCasesInFiles);
+        assertEquals(194, new FileScanner(this::check).scan(examples));
+        assertEquals(182, testCasesInFiles);
     }
 
     /**
diff --git a/src/test/resources/dig/test/virtualTestSignal.dig b/src/test/resources/dig/test/virtualTestSignal.dig
new file mode 100644
index 000000000..292ff467d
--- /dev/null
+++ b/src/test/resources/dig/test/virtualTestSignal.dig
@@ -0,0 +1,147 @@
+<?xml version="1.0" encoding="utf-8"?>
+<circuit>
+  <version>1</version>
+  <attributes/>
+  <visualElements>
+    <visualElement>
+      <elementName>Splitter</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Input Splitting</string>
+          <string>1,1,1</string>
+        </entry>
+        <entry>
+          <string>Output Splitting</string>
+          <string>3</string>
+        </entry>
+      </elementAttributes>
+      <pos x="680" y="20"/>
+    </visualElement>
+    <visualElement>
+      <elementName>In</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>A</string>
+        </entry>
+      </elementAttributes>
+      <pos x="640" y="40"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Out</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>Y</string>
+        </entry>
+        <entry>
+          <string>Bits</string>
+          <int>3</int>
+        </entry>
+      </elementAttributes>
+      <pos x="800" y="20"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Not</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Bits</string>
+          <int>3</int>
+        </entry>
+      </elementAttributes>
+      <pos x="720" y="20"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Testcase</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Testdata</string>
+          <testData>
+            <dataString>A P SP Y
+
+declare SP=(Y&gt;&gt;1)&amp;1;
+
+loop (n,20)
+1 0 0 x
+0 1 1 x
+end loop</dataString>
+          </testData>
+        </entry>
+      </elementAttributes>
+      <pos x="600" y="-80"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Probe</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Label</string>
+          <string>P</string>
+        </entry>
+      </elementAttributes>
+      <pos x="840" y="-40"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Splitter</elementName>
+      <elementAttributes>
+        <entry>
+          <string>Input Splitting</string>
+          <string>3</string>
+        </entry>
+        <entry>
+          <string>Output Splitting</string>
+          <string>1-1</string>
+        </entry>
+      </elementAttributes>
+      <pos x="800" y="-40"/>
+    </visualElement>
+    <visualElement>
+      <elementName>NotConnected</elementName>
+      <elementAttributes/>
+      <pos x="660" y="20"/>
+    </visualElement>
+    <visualElement>
+      <elementName>NotConnected</elementName>
+      <elementAttributes/>
+      <pos x="660" y="60"/>
+    </visualElement>
+  </visualElements>
+  <wires>
+    <wire>
+      <p1 x="700" y="20"/>
+      <p2 x="720" y="20"/>
+    </wire>
+    <wire>
+      <p1 x="760" y="20"/>
+      <p2 x="780" y="20"/>
+    </wire>
+    <wire>
+      <p1 x="660" y="20"/>
+      <p2 x="680" y="20"/>
+    </wire>
+    <wire>
+      <p1 x="780" y="20"/>
+      <p2 x="800" y="20"/>
+    </wire>
+    <wire>
+      <p1 x="780" y="-40"/>
+      <p2 x="800" y="-40"/>
+    </wire>
+    <wire>
+      <p1 x="820" y="-40"/>
+      <p2 x="840" y="-40"/>
+    </wire>
+    <wire>
+      <p1 x="640" y="40"/>
+      <p2 x="680" y="40"/>
+    </wire>
+    <wire>
+      <p1 x="660" y="60"/>
+      <p2 x="680" y="60"/>
+    </wire>
+    <wire>
+      <p1 x="780" y="-40"/>
+      <p2 x="780" y="20"/>
+    </wire>
+  </wires>
+  <measurementOrdering/>
+</circuit>
\ No newline at end of file