diff --git a/.travis.yml b/.travis.yml
index 88b4b9bf8401ff475b7392600ea90ad62d56be17..4065d1cb15dd8c5d625c7ed43043955d1b7bd8a8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,6 @@ script:
 - export CROMWELL_VERSION=34
 #  - wget https://github.com/broadinstitute/cromwell/releases/download/$CROMWELL_VERSION/womtool-$CROMWELL_VERSION.jar
 - wget https://barmsijs.lumc.nl/womtool-35-a7ae2d8-SNAP.jar
-- for F in *.wdl; do echo $F; java -jar womtool-*.jar validate $F; done
+- for F in `find -name "*.wdl"`; do echo $F; java -jar womtool-*.jar validate $F; done
 - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then git submodule foreach --recursive git checkout $TRAVIS_BRANCH && git submodule foreach --recursive git pull; fi'
 - "git diff --exit-code || (echo ERROR: Git changes detected. Please update submodules && exit 1)"
diff --git a/biopet/seqstat.wdl b/biopet/seqstat.wdl
index 1a1651e5c0837450e954e46e485542a24f50a551..a9c24dc688f03a1fdf00eebfab7c1be779b5c326 100644
--- a/biopet/seqstat.wdl
+++ b/biopet/seqstat.wdl
@@ -2,6 +2,8 @@ version 1.0
 
 # Copyright Sequencing Analysis Support Core - Leiden University Medical Center 2018
 
+import "../common.wdl" as common
+
 task Generate {
     input {
         String? preCommand