diff --git a/.travis.yml b/.travis.yml
index fea9378..4778562 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,12 @@ install:
 script: coverage run --source=pylast ./test_pylast.py
 after_success:
   coveralls
-after_script: ./check.sh
+after_script:
+- ./check.sh
+- pip install clonedigger
+- clonedigger pylast.py
+- grep "Clones detected" output.html
+- grep "lines are duplicates" output.html
 env:
   global:
   - secure: ivg6II471E9HV8xyqnawLIuP/sZ0J63Y+BC0BQcRVKtLn/K3zmD1ozM3TFL9S549Nxd0FqDKHXJvXsgaTGIDpK8sxE2AMKV5IojyM0iAVuN7YjPK9vwSlRw1u0EysPMFqxOZVQnoDyHrSGIUrP/VMdnhBu6dbUX0FyEkvZshXhY=
diff --git a/test_requirements.txt b/test_requirements.txt
index 83871a2..d304a29 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -1,4 +1,3 @@
-# clonedigger
 coverage
 pep8
 pyyaml