diff --git a/build.xml b/build.xml
index a73d158bbee..ce282e77443 100644
--- a/build.xml
+++ b/build.xml
@@ -130,7 +130,7 @@
     <target name="testlib" depends="compileTestlib">
         <mkdir dir="${output}/test-reports"/>
 
-        <junit printsummary="yes" haltonfailure="no">
+        <junit printsummary="yes" haltonfailure="true" logfailedtests="true">
           <classpath>
               <pathelement location="${kotlin-home}/lib/kotlin-runtime.jar"/>
               <pathelement location="${basedir}/testlib/lib/junit-4.9.jar"/>
@@ -148,7 +148,7 @@
           </test>
 -->
 
-          <batchtest fork="yes" todir="${output}/test-reports">
+          <batchtest fork="yes" todir="${output}/test-reports" haltonerror="true">
             <fileset dir="${output}/classes/testlib">
               <include name="**/*Test.*"/>
             </fileset>