diff --git build.gradle build.gradle
index 2f4167f..a72905d 100644
--- build.gradle
+++ build.gradle
@@ -272,7 +272,7 @@ project(':core') {
   }
 
   task testJar(type: Jar) {
-    appendix = 'test'
+    classifier = 'test'
     from sourceSets.test.output
   }
 
@@ -283,6 +283,9 @@ project(':core') {
     }
   }
 
+  artifacts {
+    archives testJar
+  }
 }
 
 project(':perf') {
@@ -372,7 +375,7 @@ project(':clients') {
   }
 
   task testJar(type: Jar) {
-    appendix = 'test'
+    classifier = 'test'
     from sourceSets.test.output
   }