Use mockito-core not -all.

build.gradle

@@ -87,7 +87,7 @@ subprojects {
 
     dependencies {
         testCompile group: 'junit', name: 'junit', version: '4.12'
-        testCompile group: 'org.mockito', name: 'mockito-all', version: '1.10.17'
+        testCompile group: 'org.mockito', name: 'mockito-core', version: '1.10.17'
     }
 
     task publishSnapshot(dependsOn: 'publishMavenJavaPublicationToSnapshotsRepository') << {