diff --git a/gitlab-ci/test.yml b/gitlab-ci/test.yml
index 6053aae..7ef77f2 100644
--- a/gitlab-ci/test.yml
+++ b/gitlab-ci/test.yml
@@ -15,6 +15,6 @@ javascript-tests:
   stage: test
   image: node:lts
   before_script:
-    - npm install
+    - npm ci
   script:
     - npm test
diff --git a/jest.config.js b/jest.config.js
index a9a62f6..0746761 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -168,7 +168,7 @@ module.exports = {
 
   // A map from regular expressions to paths to transformers
   transform: {
-    "^.+\\.[js|jsx]?$": "babel-jest"
+    "^.+\\.j[s|sx]?$": "babel-jest"
   },
 
   // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation