diff --git a/.travis.yml b/.travis.yml
index 3448ea6..68a8fa1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,4 +25,4 @@ env:
 
 script:
   # Run the pipeline with the test profile and test remote config
-  - nextflow run nf-core/hlatyping --custom_config_version $TRAVIS_BRANCH -profile test_configs,test,docker
\ No newline at end of file
+  - nextflow run nf-core/hlatyping --custom_config_version ${TRAVIS_BRANCH} -profile test_configs,test,docker
\ No newline at end of file