diff -r b239dfd46ad1 -r a0ff9ed74518 tests/java/build.xml
--- a/tests/java/build.xml	Fri Jun 15 21:52:34 2018 +0100
+++ b/tests/java/build.xml	Wed Jul 25 08:23:35 2018 +0000
@@ -13,6 +13,7 @@
         <mkdir dir="classloader-tests-classes/bin"/>
         <javac srcdir="classloader-tests-classes/src"
                destdir="classloader-tests-classes/bin"
+               encoding="utf-8"
                classpathref="build.classpath"/>
     </target>
     
@@ -24,6 +25,7 @@
             debuglevel="lines,vars,source"
             srcdir="src-tests-INVOKEX"
             destdir="bin-tests-INVOKEX"
+            encoding="utf-8"
             classpathref="build.classpath"/>
 
         <delete>
@@ -38,6 +40,7 @@
             debuglevel="lines,vars,source"
             srcdir="src-tests-INVOKEX-missing-methods"
             destdir="bin-tests-INVOKEX-missing-methods"
+            encoding="utf-8"
             classpathref="build.classpath">
         </javac>
         
@@ -93,4 +96,4 @@
             </batchtest>
         </junit>
     </target>
-</project>
\ No newline at end of file
+</project>