diff --git a/test/de/inetsoftware/jwebassembly/runtime/AbstractBaseTest.java b/test/de/inetsoftware/jwebassembly/runtime/AbstractBaseTest.java
index 18b527e..5bb0d6a 100644
--- a/test/de/inetsoftware/jwebassembly/runtime/AbstractBaseTest.java
+++ b/test/de/inetsoftware/jwebassembly/runtime/AbstractBaseTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 Volker Berlin (i-net software)
+ * Copyright 2018 - 2019 Volker Berlin (i-net software)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,6 +49,15 @@ public abstract class AbstractBaseTest {
         list.add( new Object[]{script, method, params} );
     }
 
+    /**
+     * Get the ScriptEngine with which the test is running.
+     * 
+     * @return the engine
+     */
+    protected ScriptEngine getScriptEngine() {
+        return script;
+    }
+
     @Test
     public void test() {
         wasm.test( script, method, params );
diff --git a/test/de/inetsoftware/jwebassembly/runtime/ControlFlowOperators.java b/test/de/inetsoftware/jwebassembly/runtime/ControlFlowOperators.java
index ed3e715..93e1937 100644
--- a/test/de/inetsoftware/jwebassembly/runtime/ControlFlowOperators.java
+++ b/test/de/inetsoftware/jwebassembly/runtime/ControlFlowOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2018 Volker Berlin (i-net software)
+ * Copyright 2018 - 2019 Volker Berlin (i-net software)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,10 +15,13 @@
  */
 package de.inetsoftware.jwebassembly.runtime;
 
+import static org.junit.Assume.assumeFalse;
+
 import java.util.ArrayList;
 import java.util.Collection;
 
 import org.junit.ClassRule;
+import org.junit.Test;
 import org.junit.runners.Parameterized.Parameters;
 
 import de.inetsoftware.jwebassembly.ScriptEngine;
@@ -57,6 +60,12 @@ public class ControlFlowOperators extends AbstractBaseTest {
         return list;
     }
 
+    @Test
+    public void test() {
+        assumeFalse( getScriptEngine() == ScriptEngine.SpiderMonkeyWat ); // https://bugzilla.mozilla.org/show_bug.cgi?id=1545755
+        super.test();
+    }
+
     static class TestClass {
 
         @Export