diff --git a/.travis.yml b/.travis.yml
index f396f23ccd4..ea02b45ddff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -77,6 +77,7 @@ script:
   # fail if generators contain tab '\t'
   - /bin/bash ./bin/utils/detect_tab_in_java_class.sh
   # run integration tests defined in maven pom.xml
+  - mvn clean install
   - mvn -q --batch-mode verify -Psamples
   # Below has been moved to CircleCI
   # docker: build generator image and push to Docker Hub
diff --git a/circle.yml b/circle.yml
index 1fb626bce55..f9aea77a432 100644
--- a/circle.yml
+++ b/circle.yml
@@ -34,13 +34,15 @@ test:
   override:
     ## test with jdk8
     - java -version
-    - mvn -q clean verify -Psamples
+    - mvn clean install
+    - mvn -q verify -Psamples
     # skip the rest if previous mvn task fails
     - if [ $? -ne 0 ]; then exit 1; fi
     ## test with jdk7
     - sudo update-java-alternatives -s java-1.7.0-openjdk-amd64
     - java -version
-    - mvn -q clean verify -Psamples
+    - mvn clean install
+    - mvn -q verify -Psamples
     # skip the rest if previous mvn task fails
     - if [ $? -ne 0 ]; then exit 1; fi
     ## docker: build generator image and push to Docker Hub
diff --git a/shippable.yml b/shippable.yml
index b55496cf569..52206a7ca08 100644
--- a/shippable.yml
+++ b/shippable.yml
@@ -22,6 +22,7 @@ build:
     - mix --version
     # test samples defined in pom.xml
     - cp pom.xml.shippable pom.xml
+    - mvn clean install
     - mvn verify -P samples
     # generate all petstore sampless (client, servers, doc)
     - ./bin/run-all-petstore 2>&1 > run-all-petstore.log