diff --git a/.circleci/config.yml b/.circleci/config.yml
index d580871690..d2d1da6b10 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -11,14 +11,11 @@ executors:
 jobs:
   test:
     executor: golang
-    resource_class: large
 
     steps:
     - checkout
     - run: make promu
-    # 'unused' and 'staticcheck' are skipped because 'go mod tidy' gives different results for Go1.11.3 and Go 1.11.4.
-    # They should be added back once CircleCI updates to 1.11.4.
-    - run: make check_license style build check_assets
+    - run: make check_license style unused staticcheck build check_assets
     - run: git diff --exit-code
     - store_artifacts:
         path: prometheus