diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9ff874c..5bf4d28 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ test:
     image: docker.io/library/alpine:3.18
     script:
         - apk update
-        - apk add npm
+        - apk add python3 npm
         - npm install --global mocha
         - tools/build --include-tests
         - mocha heimdall-test.mocha.js