diff --git a/colcon-test/action.yaml b/colcon-test/action.yaml
index 49342291..3bb1fb4c 100644
--- a/colcon-test/action.yaml
+++ b/colcon-test/action.yaml
@@ -94,6 +94,7 @@ runs:
 
         colcon lcov-result \
           --verbose \
+          --filter "*/test/*" \
           --packages-above ${{ inputs.target-packages }} || true
 
         colcon coveragepy-result \