Index: /trunk/build.xml
===================================================================
--- /trunk/build.xml	(revision 13522)
+++ /trunk/build.xml	(revision 13523)
@@ -60,4 +60,10 @@
             <isset property="isJava10"/>
         </condition>
+        <!-- Disable jacoco on Java 11+, see https://github.com/jacoco/jacoco/issues/629 -->
+        <condition property="coverageByDefault">
+            <not>
+                <isset property="isJava11"/>
+            </not>
+        </condition>
         <path id="test.classpath">
             <fileset dir="${test.dir}/lib">
@@ -474,5 +480,5 @@
         <attribute name="testfamily"/>
         <attribute name="testITsuffix" default=""/>
-        <attribute name="coverage" default="true"/>
+        <attribute name="coverage" default="${coverageByDefault}"/>
         <sequential>
             <echo message="Running @{testfamily}@{testITsuffix} tests with JUnit"/>