diff --git a/test/externalTests.sh b/test/externalTests.sh
index d872ae450..6cfea5b5c 100755
--- a/test/externalTests.sh
+++ b/test/externalTests.sh
@@ -65,7 +65,7 @@ function test_truffle
       fi
       cd ext
       echo "Current commit hash: `git rev-parse HEAD`"
-      npm install
+      npm ci
       # Replace solc package by v0.5.0
       for d in node_modules node_modules/truffle/node_modules
       do