diff --git a/.ci/publish_coverage.sh b/.ci/publish_coverage.sh
index 0189ae770f..1b9ad71ac7 100755
--- a/.ci/publish_coverage.sh
+++ b/.ci/publish_coverage.sh
@@ -49,7 +49,10 @@ for file in `ls $ARTIFACT_FOLDER | grep ".info"`; do
 
 done
 
-lcov $ARGS --output-file /tmp/coverage.info
+lcov $ARGS --output-file /tmp/coverage_temp.info
+
+# filter out unwanted files
+lcov --remove /tmp/coverage_temp.info "*eth_*" --output-file /tmp/coverage.info || echo "$0: coverage tracefile is empty"
 
 genhtml --title "MRS UAV System - Test coverage report" --demangle-cpp --legend --frames --show-details -o /tmp/coverage_html /tmp/coverage.info | tee /tmp/coverage.log
 
diff --git a/.ci/test.sh b/.ci/test.sh
index d61695eedd..c820ce0b8f 100755
--- a/.ci/test.sh
+++ b/.ci/test.sh
@@ -121,8 +121,13 @@ if [[ "$FAILED" -eq 0 ]]; then
 
   echo "$0: storing coverage data"
 
+  # gather all the coverage data from the workspace
   lcov --capture --directory ${WORKSPACE} --output-file /tmp/coverage.original
-  lcov --remove /tmp/coverage.original "*/test/*" "*/*eth_*/*" --output-file /tmp/coverage.removed || echo "$0: coverage tracefile is empty"
+
+  # filter out unwanted files, i.e., test files
+  lcov --remove /tmp/coverage.original "*/test/*" --output-file /tmp/coverage.removed || echo "$0: coverage tracefile is empty"
+
+  # extract coverage data for the source folder of the workspace
   lcov --extract /tmp/coverage.removed "$WORKSPACE/src/*" --output-file $ARTIFACT_FOLDER/$REPOSITORY_NAME.info || echo "$0: coverage tracefile is empty"
 
 fi