diff --git a/ci/buildkite.yml b/ci/buildkite.yml
index f8725e2a4f..7fef0ef747 100644
--- a/ci/buildkite.yml
+++ b/ci/buildkite.yml
@@ -1,5 +1,5 @@
 steps:
-  - command: "ci/coverage.sh || true"
+  - command: "ci/coverage.sh"
     label: "coverage"
     # TODO: Run coverage in a docker image rather than assuming kcov/cargo-kcov
     #       is installed on the build agent...
diff --git a/ci/coverage.sh b/ci/coverage.sh
index b65747997a..46d287772d 100755
--- a/ci/coverage.sh
+++ b/ci/coverage.sh
@@ -14,7 +14,7 @@ cargo-kcov --version
 
 export RUST_BACKTRACE=1
 cargo build
-cargo kcov
+cargo kcov --lib
 
 if [[ -z "$CODECOV_TOKEN" ]]; then
   echo CODECOV_TOKEN undefined