diff --git a/src/test/java/com/fasterxml/jackson/databind/interop/IllegalTypesCheckTest.java b/src/test/java/com/fasterxml/jackson/databind/interop/IllegalTypesCheckTest.java
index 5ccb0fb783..5c11ec6104 100644
--- a/src/test/java/com/fasterxml/jackson/databind/interop/IllegalTypesCheckTest.java
+++ b/src/test/java/com/fasterxml/jackson/databind/interop/IllegalTypesCheckTest.java
@@ -79,7 +79,11 @@ public void testJDKTypes1737() throws Exception
     public void testJDKTypes1855() throws Exception
     {
         // apparently included by JDK?
+        // 05-Mar-2019, tatu: may or may not be included; but breaks tests for Java 11.
+        //   Also not sure if it ever was widely included so...
+        /*
         _testIllegalType("com.sun.org.apache.bcel.internal.util.ClassLoader");
+        */
 
         // also: we can try some form of testing, even if bit contrived...
         _testIllegalType(BogusPointcutAdvisor.class);