diff --git a/.travis.yml b/.travis.yml
index 188db74d62..bf86746bc7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,11 +1,14 @@
 language: java
 jdk: oraclejdk8
 sudo: false
+cache:
+  directories:
+  - $HOME/.gradle
 services:
   - mongodb
   - rabbitmq
   - redis-server
 env:
-  - TERM=dumb SI_FATAL_WHEN_NO_BEANFACTORY=true
+  - TERM=dumb SI_FATAL_WHEN_NO_BEANFACTORY=true NO_REFERENCE_TASK=true
 #script:
-#  - ./gradlew build --parallel
+#  - travis_wait ./gradlew build
diff --git a/build.gradle b/build.gradle
index 042ddef08c..3057b6a10b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -786,6 +786,10 @@ reference {
 
 reference.dependsOn asciidoctor
 
+[asciidoctor, reference, referenceEpub, referenceHtmlMulti, referenceHtmlSingle, referencePdf].each {
+	it.onlyIf { "$System.env.NO_REFERENCE_TASK" != 'true' || project.hasProperty('ignoreEnvToStopReference') }
+}
+
 apply plugin: 'sonar-runner'
 
 sonarRunner {