diff --git a/.circleci/config.yml b/.circleci/config.yml
index 87f64b6..462c0c8 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -42,4 +42,7 @@ jobs:
           command: opam install -y ocveralls
       - run:
           name: Upload coverage report
-          command: opam config exec -- ocveralls bisect*.out --send --repo_token $COVERALLS_REPO_TOKEN --git
+          command: |
+            cd _build/default
+            shopt -s globstar
+            opam config exec -- ocveralls **/bisect*.out --send --repo_token $COVERALLS_REPO_TOKEN --git