diff --git a/.travis.yml b/.travis.yml
index 299466a..692453a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,11 +13,16 @@ env:
   - TRAVIS_JDK=1.11.0-3
   - TRAVIS_JDK=openjdk@1.11.0-2
   - TRAVIS_JDK=amazon-corretto@1.11.0-3.7.1
+  # Default JDK of xenial
+  - TRAVIS_JDK=
 
-before_install: curl -Ls https://git.io/jabba | bash && . ~/.jabba/jabba.sh
+before_install: test -z "$TRAVIS_JDK" || (curl -Ls https://git.io/jabba | bash && . ~/.jabba/jabba.sh)
 
 install:
-  - jabba install "$TRAVIS_JDK" && jabba use $_ && java -Xmx32m -version
+  # Only install and use JDK if it is set. If empty, use system JDK.
+  - test -z "$TRAVIS_JDK" || (jabba install "$TRAVIS_JDK" && jabba use $_);
+  # Print the JDK we are going to use.
+  - java -Xmx32m -version
   # due to a bug, dependency resolve will try to resolve reactor projects from subfolders, although
   # excludeReactor=true is set.
   #  - ./mvnw dependency:resolve dependency:resolve-plugins