diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7c9d7b1..98a6044 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -45,6 +45,7 @@ compile_jvm:
       - .scala-build/
 
 test_jvm:
+  image: gumjoe/wacc-ci-scala:x86
   stage: test
   # Use our own runner (not cloud VM or shared) to ensure we have multiple cores.
   tags: [ large ]