diff --git a/.github/scripts/prepare_coverage_data.sh b/.github/scripts/prepare_coverage_data.sh
index 32d86772f46..99038f01454 100755
--- a/.github/scripts/prepare_coverage_data.sh
+++ b/.github/scripts/prepare_coverage_data.sh
@@ -192,8 +192,8 @@ cd info_files
 git clone https://github.com/linux-test-project/lcov -b v2.3-beta
 PATH="`pwd`/lcov/bin:$PATH"
 
-ls *_toggle.info | xargs printf -- '-a %s\n' | xargs echo | awk '{ print "lcov "$0" --ignore-errors inconsistent --rc lcov_branch_coverage=1 -o coverage_toggle_verilator.info" }' | bash
-ls *_branch.info | xargs printf -- '-a %s\n' | xargs echo | awk '{ print "lcov "$0" --ignore-errors inconsistent --rc lcov_branch_coverage=1 -o coverage_line_verilator.info" }' | bash
+ls *_toggle.info | xargs printf -- '-a %s\n' | xargs echo | awk '{ print "lcov "$0" -j --ignore-errors inconsistent --rc lcov_branch_coverage=1 -o coverage_toggle_verilator.info" }' | bash
+ls *_branch.info | xargs printf -- '-a %s\n' | xargs echo | awk '{ print "lcov "$0" -j --ignore-errors inconsistent --rc lcov_branch_coverage=1 -o coverage_line_verilator.info" }' | bash
 
 cp coverage_toggle_verilator.info ../
 cp coverage_line_verilator.info ../